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ENERGY STAR® for New Homes Standard - Version 12.6

Effective: 22 April 2015

PREFACE

The ENERGY STAR® for New HomesFootnote 1 (ESNH) Standard Version 12 is the first comprehensive national ESNH Standard to be published. Prior to this standard, technical requirements for ESNH have included three revisions of Natural Resources Canada’s (NRCan’s) “Minimum Requirements for ENERGY STAR® Qualified New Homes” and several revisions of technical specifications for Ontario and Saskatchewan.

This edition was developed using an open and transparent process which included the formation of a Committee with a balanced representation of expertise and interest groups, a decision-making process based on the principles of consensus, and public review of the final draft “ENERGY STAR® for New Homes Standard.”

Key changes in the “ENERGY STAR® for New Homes Standard Version 12” include:

  • Using a building code reference house as the baseline. A reference house is based on minimum requirements under the applicable building code. It forms the baseline for determination of the energy target. This ensures that ESNH is complementary to building codes that include energy requirements.
  • Making the energy target more stringent. An ENERGY STAR® qualified home is approximately 20 percent more efficient than a reference house. This level strikes a balance between the premium level of energy efficiency associated with the ENERGY STAR® label and an acceptable incremental cost (relative to a house built to minimum building code requirements).
  • Mandating minimum insulation requirements. All ENERGY STAR® qualified homes, regardless of compliance approach, have minimum prescribed levels of insulation. This ensures a certain level of emphasis is placed on the envelope which reinforces good building science principles as well as provides consistent messaging for all ENERGY STAR® qualified homes.
  • Mandating a minimum amount of electrical savings. All ENERGY STAR® qualified homes, regardless of compliance approach, have a minimum of 400 kilowatt-hours (kWh) of electrical savings relative to houses with non-ENERGY STAR® qualified products. This ensures a certain level of electrical savings in all ESNH qualified homes and provides consistent messaging. Offering a variety of choices provides flexibility to builders.
  • Changes to the prescriptive and performance methodologies. For the prescriptive approach, ESNH uses a ‘core Builder Option Package (BOP) plus options approach’. To meet compliance, a builder must implement all aspects of the core BOP and then choose a minimum number of items from an options list specified for each BOP. For the performance approach, the builder must meet a prescribed energy target in addition to the minimum requirements.
  • Flexible integration of ENERGY STAR qualified products. With the exception for fenestration, there is no longer a blanket requirement for ENERGY STAR® qualified products. Instead, ENERGY STAR® qualified products, such as appliances and lighting, are included on the eligible electrical savings list. The requirement for a certain minimum amount of electrical savings encourages installation of these products yet provides flexibility for builders.

Major changes have also been made to the format of documentation for the program. Previously, there were “Minimum Requirements” (with NRCan approved exemptions), “Compliance Options”, an NRCan-approved Builder Option Package (BOP) for Saskatchewan, and a Technical Specification for Ontario. Moving forward, the minimum requirements and compliance options will all be developed and owned by NRCan and combined into this one document in a format closely following that of official standards. Separate ESNH Administrative Procedures will accompany this Standard.

All comments and inquiries regarding this standard, including requests for interpretation, should be addressed to New Housing, Housing Division, Office of Energy Efficiency, Natural Resources Canada, 930 Carling Ave., Building #1, Ottawa, ON, K1Y 4X2 or e-mail: NewHousingInquiries_nh@NRCan.gc.ca.

Summary of Changes

Section - Technical Change

4.2.1 Clarification. Reference to energy advisor procedures added to clause to provide additional clarity on the appropriate airtightness method, and reference title revised to ensure consistency with published version.
4.2.3 and 6 Addition. Alternate ENERGY STAR specifications for windows added to minimum requirements and builder option packages to reflect new ENERGY STAR window specifications.
4.3.2 Clarification. Footnote added to provide flexibility in accreditation requirements for testing facilities.

TABLE OF CONTENTS

 

  • PREFACE
  • SUMMARY OF CHANGES
    • Next Generation ENERGY STAR® for New Homes Advisory Committee
    • Working Group on Building Envelope
    • Builder Option Package Working Groups
  • INTRODUCTION
  • 1 SCOPE AND APPLICATION
    • 1.1 Scope
    • 1.2 Application
      • 1.2.1 Eligible Housing Types
      • 1.2.2 Climatic Data
        • 1.2.2.1 Determination of number of heating degree days
        • 1.2.2.2 Determination of frostline depth
    • 1.3 Compliance
      • 1.3.1 Minimum Requirements
      • 1.3.2 Compliance Options
      • 1.3.3 Effective Date
  • 2 REFERENCES
    • 2.1 Documents Produced by Natural Resources Canada
    • 2.2 Documents Published by Other Organizations
  • 3 DEFINITIONS AND ABBREVIATED TERMS
  • 4 MINIMUM REQUIREMENTS
  • 5 COMPLIANCE OPTIONS
    • 5.1 Performance Approach
      • 5.1.1 General
      • 5.1.2 Energy Target
      • 5.1.3 Approved Compliance Software
      • 5.1.4 Energy Credits
    • 5.2 Prescriptive Approach
      • 5.2.1 General
      • 5.2.2 Builder Option Packages
      • 5.2.3 Effective Thermal Resistance of Opaque Assemblies
      • 5.2.4 Window to Wall Ratio
  • 6 REGIONAL SPECIFICATIONS
    • 6.1 Alberta
      • 6.1.1 Climate Zones for Alberta
      • 6.1.2 Electrical Savings Options for Alberta
      • 6.1.3 Performance Targets for Alberta
      • 6.1.4 Builder Option Packages for Alberta
    • 6.2 British Columbia
      • 6.2.1 Climate Zones for British Columbia
      • 6.2.2 Electrical Savings Options for British Columbia
      • 6.2.3 Performance Targets for British Columbia
      • 6.2.4 Builder Option Packages for British Columbia
    • 6.3 Manitoba
      • 6.3.1 Climate Zones for Manitoba
      • 6.3.2 Electrical Savings Options for Manitoba
      • 6.3.3 Performance Targets for Manitoba
      • 6.3.4 Builder Option Packages for Manitoba
    • 6.4 New Brunswick
      • 6.4.1 Climate Zones for New Brunswick
      • 6.4.2 Electrical Savings Options for New Brunswick
      • 6.4.3 Performance Targets for New Brunswick
      • 6.4.4 Builder Option Packages for New Brunswick
    • 6.5 Newfoundland and Labrador
      • 6.5.1 Climate Zones for Newfoundland and Labrador
      • 6.5.2 Electrical Savings Options for Newfoundland and Labrador
      • 6.5.3 Performance Targets for Newfoundland and Labrador
      • 6.5.4 Builder Option Packages for Newfoundland and Labrador
    • 6.6 Northwest Territories
      • 6.6.1 Climate Zones for Northwest Territories
      • 6.6.2 Electrical Savings Options for Northwest Territories
      • 6.6.3 Performance Targets for Northwest Territories
      • 6.6.4 Builder Option Packages for Northwest Territories
    • 6.7 Nova Scotia
      • 6.7.1 Climate Zones for Nova Scotia
      • 6.7.2 Electrical Savings Options for Nova Scotia
      • 6.7.3 Performance Targets for Nova Scotia
      • 6.7.4 Builder Option Packages for Nova Scotia
    • 6.8 Nunavut
      • 6.8.1 Climate Zones for Nunavut
      • 6.8.2 Electrical Savings Options for Nunavut
      • 6.8.3 Performance Targets for Nunavut
      • 6.8.4 Builder Option Packages for Nunavut
    • 6.9 Ontario
      • 6.9.1 Climate Zones for Ontario
      • 6.9.2 Electrical Savings From Air Conditioning for Ontario
      • 6.9.3 Performance Targets for Ontario
      • 6.9.4 Builder Option Packages for Ontario
    • 6.10 Prince Edward Island
      • 6.10.1 Climate Zones for Prince Edward Island
      • 6.10.2 Electrical Savings Options for Prince Edward Island
      • 6.10.3 Performance Targets for Prince Edward Island
      • 6.10.4 Builder Option Packages for Prince Edward Island
    • 6.11 Saskatchewan
      • 6.11.1 Climate Zones for Saskatchewan
      • 6.11.2 Electrical Savings Options for Saskatchewan
      • 6.11.3 Performance Targets for Saskatchewan
      • 6.11.4 Builder Option Packages for Saskatchewan
    • 6.12 Yukon
      • 6.12.1 Climate Zones for Yukon
      • 6.12.2 Electrical Savings Options for Yukon
      • 6.12.3 Performance Targets for Yukon
      • 6.12.4 Builder Option Packages for Yukon
  • APPENDIX A: AIRTIGHTNESS METRICS

Next Generation ENERGY STAR® for New Homes Advisory Committee

J. McNally, Ontario Power Authority, Toronto, Ontario, Chair
F. Belle, FM Residential Design & Consulting, Regina, Saskatchewan, Vice-Chair
R. Clarke, R. CLARKE Designs Ltd, Oromocto, New Brunswick
R. de Ruiter, BuyWise Consulting Inc., London, Ontario
P. Duffy, Icynene Inc., Mississauga, Ontario
K. Hanson, Sun Ridge Group, Saskatoon, Saskatchewan
S. Mason, Mason Homes, Concord, Ontario
C. McBurney, EnerQuality Corporation, Toronto, Ontario
A. Oding, Reid’s Heritage Homes, Guelph, Ontario
D. Overholt, BC Hydro Power Smart, Vancouver, British Columbia
R. Pekar, Northridge Development Corporation, (December 2010 – June 2011), PEKARBILT Homes and Commercial, Regina, Saskatchewan, (June 2011 – December 2011)
P. Pettipas, Nova Scotia Home Builders Association, Halifax, Nova Scotia
C. Simmonds, Canadian Home Builders Association-New Brunswick, Fredericton, New Brunswick
F. Walter, Climate Change Central, Calgary, Alberta, (December 2010 – September 2011)

Ex Officio

R. Charron, Canadian Mortgage and Housing Corporation, Ottawa, Ontario
D. Haltrecht, Natural Resources Canada, Ottawa, Ontario, Manager of the Development Process
M. Mihailovic, National Research Council, Ottawa, Ontario
A. Parekh, Natural Resources Canada, Ottawa, Ontario, Technical Advisor
J. Passe, U.S. Environmental Protection Agency, Washington D.C., U.S.A.
L.A. Robertson, Natural Resources Canada, Ottawa, Ontario, Secretary

Working Group on Building Envelope

Committee Members

P. Duffy (Chair)
C. Simmonds
M. Mihailovic
L. A. Robertson (Secretary)

External Experts

D. Boyd, NS HBA
M. Kapuscinski, NAIMA Canada
P. Lip, EnerQuality

Builder Option Package Working Groups

Alberta

G. Cooper – Tierra Diosa Consulting
S. Dahl – Dolce Vita Homes
L. Hagen – Ecological Homes
T. Hermanson – 3 Elements Integrated Design Ltd.
K. Paget – Sterling Group
D. Turnbull – Landmark Homes
L.A. Robertson (Secretary) - NRCan

British Columbia

P. DaDalt – Quadra Homes
D. Dhillon – Oakwood Homes
S. Hargrave – Hargrave Construction Ltd.
D. Larson – Limona Group
C. Sacht – Elemental Energy Advisors Ltd.
W. Smith – Performance Energy Advisors
M. Young – City Green Solutions
D. Overholt (ex oficio) – DL Overholt Management Services
L.A. Robertson (Secretary) - NRCan

New Brunswick and Prince Edward Island

G. Briand - Enercheck
P. Brown – Bayside Builders
S. Costain – Scot-Cor Construction
L. Lipka – EnergyWise Consulting
S. Richard – Kent Homes
D. Robinson – Pro-Woodworking Enterprises Ltd.
J. Waugh – Efficiency NB
C. McLellan (Technical Advisor) - NRCan
L.A. Robertson (Secretary) – NRCan

Newfoundland and Labrador

D. Brushett – ThermalWise: Building Energy Savings
W. Butler – Butler’s Quality Contracting
S. Colbourne – ERCO Homes
G. Cooper – Cooper Quality Construction Ltd.
B. Dunn – Amerispec
J. Parsons – K&P Contracting
L.A. Robertson (Secretary) - NRCan

Nova Scotia

M. Brownlow – Sustainable Housing
G. Hammond – Destiny Homes
C. Howden – Denim Homes
M. Livingston – Cresco
D. Naughler – Hawk-Eye Designs
R. Rhindress – Grandview Homes
C. McLellan (Technical Advisor) - NRCan
L.A. Robertson (Secretary) – NRCan

Ontario

G. Botelho - Empire Communities
G. Cooke - Building Knowledge
J. Van Leuken - Braebury Homes
M. Memme - Mountainview Homes
P. Monkhouse - Monkhouse Homes
S. Desjardins - Minto Communities Inc.
W. Rowbotham - EnerTest Corporation
L. A. Robertson (Secretary) - NRCan

Saskatchewan

F. Belle - FM Residential Design & Consulting
D. Ehrenberg - Ehrenberg Homes
Y. LeBlanc - Streetscape Homes
D. Metcalf - North Ridge Development Corp.
B. Sthamann - Sthamann Homes Inc.
R. Spriggs - Amerispec
L. Walkington - Regina & Region Home Builders’ Association
L.A. Robertson (Secretary) - NRCan

INTRODUCTION

The international ENERGY STAR® program was developed by the U.S. Environmental Protection Agency (EPA) in 1992. The program was designed to encourage energy-efficient practices that help to reduce greenhouse gas emissions. By identifying and promoting energy-saving products, the initiative helps protect the environment and lowers energy bills at the same time. The Office of Energy Efficiency (OEE) of NRCan has promoted the international ENERGY STAR® symbol in Canada and monitored its use since 2001.

The ENERGY STAR® for New Homes (ESNH) initiative promotes energy efficiency guidelines that enable new homes to be approximately 20 percent more energy efficient than those built to the provincial or national building code.Footnote 2 The increased efficiency of these homes translates into reduced energy costs for homeowners.

Overview

An ENERGY STAR® qualified home is a home that has been built by a licensed ENERGY STAR® for New Homes builder who incorporates energy-efficient features into the home so that it can meet the specifications in the ESNH Standard. A sampling of ENERGY STAR® qualified new homes are evaluated on-site by an independent energy advisor (i.e., one not employed by the builder). ESNH energy advisors are recruited, trained and certified by an ESNH service organization that is licensed by NRCan.

Features

Some of the features that builders typically incorporate into ENERGY STAR® qualified new homes include:

  • Heating and cooling systems: More energy efficient space conditioning systems, such as furnaces, air conditioners, and water heaters.
  • Windows, patio doors and skylights: Fenestration products, such as windows, glass doors and skylights, that are ENERGY STAR® qualified. This feature alone may reduce energy costs by more than 10 percent.
  • Walls and ceilings: There is often more insulation in the ceilings and walls of an ENERGY STAR® qualified home than required by the building code.
  • Airtightness: ENERGY STAR® qualified houses must meet specified maximum air leakage limits, which helps save energy for heating and cooling as well as increases comfort.
  • Electrical savings: Each ENERGY STAR® qualified house has a minimum of 400 kilowatt-hours (kWh) of electrical savings measures, such as ENERGY STAR® qualified lighting or appliances, which help reduce electrical loads.

1.0 SCOPE AND APPLICATION

1.1 Scope

The “ENERGY STAR® for New Homes Standard” specifies the technical requirements for a house to be an ENERGY STAR qualified home. It covers topics such as eligibility requirements, pertinent references, and terms and definitions used in the program. It also specifies the minimum requirements common to all ENERGY STAR qualified new homes, outlines the compliance options, and details the prescriptive packages, also known as the Builder Option Packages (BOPs).

1.2 Application

1.2.1 Eligible Housing Types

ENERGY STAR for New Homes (ESNH) applies to new residential buildings that:

  1. are not more than three (3) storeys in building height and not more than 600 m2 in building area,
  2. are on permanent foundations, and
  3. are one of the following types:
    1. detached houses, including houses with secondary suites,
    2. attached houses, which include semi-detached houses, row houses, and attached houses with secondary suites, and,
    3. multi-unit residential buildings (MURBs), which include stacked townhouses, duplexes, triplexes and apartment buildings.

NOTES:

  1. Under ESNH, new residential buildings are considered those that are no more than six (6) months old following the date of first occupancy.
  2. ESNH does not apply to buildings that contain non-residential units.

1.2.2 Climatic Data

1.2.2.1 Determination of number of heating degree days

Where required in this Standard, the number of heating degree days shall be defined based on applicable building code requirements. Where the applicable building code does not define the number of heating degree days, or where no applicable provincial building code exists, NBC 2010 Appendix C shall be used.

1.2.2.2 Determination of frostline depth

The National Building Code of Canada requires that the depth of frost penetration (i.e. the frostline) be established on the basis of local experience. The governmental body responsible for the enforcement of the building code or the official or agency designated by that body to exercise such a function can advise users of this standard as to the frostline in their region.

1.3 Compliance

1.3.1 Minimum Requirements

All ENERGY STAR® qualified homes shall comply with the minimum requirements specified in Section 4.

1.3.2 Compliance Options

All ENERGY STAR® qualified homes shall follow one of the compliance options specified in Section 5.

1.3.3 Effective Date

This Standard comes into effect on April 14, 2014. Houses enrolled as of this date shall comply with this Standard.

2. References

The following referenced documents are required for the application of this Standard.

2.1 Documents Produced by Natural Resources

Title - ESNH Reference

ENERGY STAR® for New Homes Administrative Procedures, Version 12.0 - Preface

Energy Advisor Workshop Manual (December 2005) - 4.2.1

Evaluation Procedures for Low-Rise Multi-Unit Residential and Mixed-Used Buildings - 4.2.1

Climate Zones – ENERGY STAR (Fenestration) - 4.2.3

New Housing Programs’ 2012 Energy Credits - 5.1.4

ENERGY STAR® for New Homes® Tables for Calculating Effective Thermal Resistance of Opaque Assemblies - 5.2.3

These documents may be obtained from:

New Housing
Office of Energy Efficiency
Natural Resources Canada
930 Carling Ave., Building #1
Ottawa, ON K1Y 4X2
NewHousingInquiries_nh@NRCan.gc.ca

2.2 Documents Published by Other Organizations

Issuing
Agency		 Document Number Title of Document ESNH Reference
ANSI/
ASHRAE		 62.1-2010 Ventilation for Acceptable Indoor Air Quality 4.7.1.5
CCBFC NRCC 53301 National Building Code of Canada 2010 1.2.1
1.2.2
CGSB 51-GP-27M-1979 Thermal Insulation, Polystyrene, Loose Fill 4.2.2.2
CGSB CAN/CGSB-51.25-M87 Thermal Insulation, Phenolic, Faced 4.2.2.2
CGSB CAN/CGSB-149.10-M86 Determination of the Airtightness of Building Envelopes by the Fan Depressurization Method 4.2.1
CSA B55.1-12 Test Method for Measuring Efficiency and Pressure Loss of Drain Water Heat Recovery Units 4.4
CSA C828-13 Performance requirements for thermostats used with individual room electric space heating devices 6.4.4
6.7.4
6.10.4
CSA F378.1-11 Glazed and unglazed liquid heating solar collectors - Test methods 4.5
CSA F378-87 (R2004) Solar Collectors 4.5
CSA P.7-10 Test method for Measuring Energy Loss of Gas-Fired Instantaneous Water Heaters 3.1
CSA P.9-11 Test method for determining the performance of combined space and water heating systems (combos) 4.3.2
CSA P.10-07 Performance of Integrated Mechanical Systems for Residential Heating and Ventilation 4.3.1
CSA CAN/CSA-B415.1-10 Performance Testing of Solid-Fuel-Burning Heating Appliances 3.1
4.3.4.2
4.3.4.3
CSA CAN/CSA F326 Residential Mechanical Ventilation Systems Table 3
CSA CAN/CSA F379 Series-09 Packaged Solar Domestic Hot Water Systems (liquid to liquid heat transfer) 4.5
EPA 40 Code of Federal Regulations (CFR) Part 60 Subpart AAA Standards of Performance for New Residential Wood Heaters 4.3.4.2
4.3.4.3
ULC CAN/ULC-S701-05 Thermal Insulation, Polystyrene, Boards and Pipe Covering 4.2.2.2
ULC CAN/ULC-S702-97 Mineral Fibre Thermal Insulation for Buildings 4.2.2.2
ULC CAN/ULC-S703-01 Cellulose Fibre Insulation (CFI) for Buildings 4.2.2.2
ULC CAN/ULC-S704-03 Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced 4.2.2.2
ULC CAN/ULC-S705.1-01 Thermal Insulation – Spray Applied Rigid Polyurethane Foam, Medium Density – Material - Specification 4.2.2.2
ULC CAN/ULC-S706-02 Wood Fibre Thermal Insulation for Buildings 4.2.2.2
ULC CAN/ULC-S712.1-10 Standard for Thermal Insulation – Light Density, Open Cell Spray Applied Semi-Rigid Polyurethane Foam – Material Specification 4.2.2.2
ULC CAN/ULC-S716.1-11 Standard for Exterior Insulation and Finish Systems (EIFS) – Materials and Systems 4.2.2.2

3 Definitions and abbreviated terms

3.1 Definitions

The following terms and definitions, which are italicized throughout, apply for the purposes of this document.

above grade wall area
The above grade wall area is measured on the basis of interior wall dimensions and includes all perimeter boundary walls that are exposed to the exterior or common to another heated unit and perimeter floor framing (i.e., rim joists) extending from the line of finished ground to the ceiling of the uppermost floor.
air changes per hour @50 Pa
The number of times per hour the entire heated volume of air in a house is replaced when the building envelope is subjected to a differential pressure of 50 Pascals with the exterior.
air-source heat pumps
Air-source heat pumps come in two configurations: split system and single package. Split system air-source heat pumps are comprised of a matched condenser coil (outdoor unit comprising a condenser coil, compressor and cooling fan) and indoor coil (typically located with the furnace or air handler). A single package system has all components in one cabinet and is located on the roof or through the wall.

NOTES:

  1. The inclusion of an energy-efficient DC blower motor in the furnace or air handler may be used to determine the energy efficiency rating of the matched split system to qualify as an ENERGY STAR product.
  2. For modelling purposes, energy efficiency ratings for air source heat pumps are listed at: a) Single package: http://oee.nrcan.gc.ca/pml-lmp/index.cfm?action=app.search-recherche&appliance=HP_SP and b) split-system: http://oee.nrcan.gc.ca/pml-lmp/index.cfm?action=app.search-recherche&appliance=HP_SS.
     
apartment building
A multi-unit residential building that has four or more residential units.
approved compliance software
Residential building energy simulation modelling software approved by NRCan, e.g., HOT2000™.
attached house
One residential unit that shares a wall with one or more adjacent dwellings, each with a separate entrance. Alternate names are row house, townhouse, and semi-detached.

NOTE: Attached houses do not include stacked units – stacked units fall under multi-unit residential buildings.

builder option package (BOP)
A set of pre-determined building envelope, mechanical and electrical specifications which have been validated against a representative standard set of house archetypes developed by NRCan to ensure, on average, a specified performance level.
building area
The greatest horizontal area of a building above grade within the outside surface of the exterior walls or within the outside surface of exterior walls and the centre line of firewalls.
building height
Building height is determined in conformity with the National Building Code of Canada, or the provincial or territorial building code in force, or, is the number of storeys fully above the highest point of finished ground with no more than a combination of four full or partial storeys above the lowest point of finished ground.
combined space and water heating system
A system that provides both space heating and domestic hot water using a fuel-fired boiler or a storage-type or tankless water heater. The system may or may not include a secondary storage tank.
detached house
A residential unit with walls, floors, ceilings and roof independent of any other building, as opposed to semi-detached or row house sharing common walls.
direct-vent
A venting system in which all the combustion air is supplied directly from the outdoors and the products of combustion are vented directly to the outdoors via independent, totally enclosed passageways connected directly to the appliance.
duplex
A multi-unit residential building that has 2 stacked units.
effective thermal resistance
Represents the combined resistance to the flow of heat of all the elements of a given assembly, taking into account the various thermal properties of these elements; measured in R-value.
EnerGuide Rating
A standard measure of a home's energy performance using standard operation assumptions; the energy efficiency level is rated on a scale of 0 to 100, with 100 being the most efficient.
energy efficiency ratio (EER)
A measure of energy performance for cooling equipment and heat pump systems. The steady-state rate of heat energy removal (i.e. cooling capacity) by the equipment measured in Btu/h divided by the steady-state rate of energy input to the equipment measured in watts at specified temperatures.
ENERGY STAR ®
A registered trademark identifying an international energy efficiency program developed by the U.S. Environmental Protection Agency (EPA) in 1992; the Office of Energy Efficiency (OEE) of NRCan has promoted the international ENERGY STAR® symbol in Canada and monitored its use since 2001.
ENERGY STAR qualified
ENERGY STAR® qualified products have been tested according to prescribed procedures and been found to meet or exceed higher energy efficiency levels without compromising performance. For ENERGY STAR® qualified categories and products in Canada, see: http://oee.nrcan.gc.ca/residential/10759.
equivalent leakage area
The size of the hole through which would pass the same amount of air that passes through all of the air leakage holes in the building envelope when the pressure across all holes is equal. It is the area of a sharp edged orifice (a sharp round hole cut in a thin plate) that would leak the same amount of air as the building does at a pressure difference of 10 Pascals; expressed in cm2 or in2.
exterior door system
An exterior door system is a door that is exposed to the outdoors, and includes the door slab, frame, and all packaged integrated glazing, transoms and sidelights.
finished grade
The average elevation of finished ground as determined between two points extending from one corner to the next corner along a wall of the building.
finished ground
The elevation of the built and natural environment adjoining the exterior of the building, as determined at any single point.
fixture
A complete lighting unit consisting of a lamp or lamps, housing, and a connection to a source of electrical power. Floor and desk lamps, chandeliers, vanity light bars, pendulum lights and wall sconces are all considered "fixtures". Also known as a luminaire or lamp.
fuel-fired boiler
A self-contained fuel burning appliance with an energy input of less than 300,000 Btu/h, for supplying low-pressure steam or hot water for space heating. The energy efficiency performance over a heating season for a boiler is measured by the annual fuel utilization efficiency (AFUE). Eligible units fall under Canada’s Energy Efficiency Regulations and are listed on NRCan’s equipment database.

NOTE: NRCan’s database for residential equipment is found at: http://oee.nrcan.gc.ca/pml-lmp/index.cfm?action=app.welcome-bienvenue

heating degree days
The summation of the number of Celsius degrees for which the mean daily temperature is below 18°C for a calendar year.
instantaneous (water heater)
Also referred to as a tankless water heater or an on-demand water heater. See water heater for more information.
integrated HRV air handler
A product that provides air circulation and distribution of fresh air as well as ventilation with heat recovery.
integrated mechanical system
A product or set of products that provides all of the following functions: space heating; potable water heating; ventilation with heat recovery; and air circulation and distribution of fresh air.
mechanically-vented
An appliance or piece of equipment and its combustion venting system in which the products of combustion are entirely exhausted to the outdoors by a mechanical device, such as a fan, blower or aspirator, upstream or downstream from the combustion zone of the appliance or equipment, and the portion of the combustion venting system that is downstream of the fan, blower or aspirator is sealed and does not include draft hoods or draft control devices.
multi-unit residential building (MURB)
A MURB is a low-rise building of purely residential occupancy that:
  • consists of a set of separate stacked residential units, with each residential unit having a private entrance either outside the building or from a common hall, lobby, vestibule or stairway inside the building,
  • incorporates a minimum of two vertically stacked residential units and is a minimum of two storeys above finished grade, and
  • contains no more than 32 residential units, including common areas.

Row houses not meeting these requirements are not considered to be MURBs. Houses and houses with secondary suites do not qualify as MURBs.

nominal thermal resistance
Represents the resistance to the flow of heat of the installed insulation of a given assembly; measured in R-value.
normalized leakage area 
The ratio of the equivalent leakage area to the area of the building envelope, where the area of the building envelope is defined as all floors, walls (including doors and windows)and ceilings (flat or sloping) that are correspondingly below, above and adjacent to unheated spaces and spaces heated to less than 10 °C, and are based on interior dimensions; expressed in cm2/m2 or in2/ft2. 
normalized leakage rate at 50 pascals
The quantity of air that leaks into or out of the building per hour, divided by the total envelope surface area (in m2 or ft2) at a differential pressure of 50 Pa, where total envelope surface area is defined as all floors, walls (including doors and windows) and ceilings (flat or sloping), and are based on interior dimensions; expressed in L/s • m2 @50Pa or CFM/ft2 @50 Pa.

NOTE: Walls which are common with another heated unit are included in the total envelope surface area. 

opaque assembly
A building assembly that does not let any light pass through, excluding opaque components of door and window units.
permanent foundation
An assembly that transfers loads from the building to the supporting soil or rock, and renders the building immovable.
principal ventilation capacity
The airflow rate of the ventilation system which is 40% to 60% of the total ventilation capacity.
R-value
The measure of thermal resistance. The higher the R-value, the greater the resistance to heat. When used in this Standard, the metric R-value, denoted as ‘RSI’, will be followed by the imperial R-value in parenthesis, denoted by ‘R’, e.g., RSI 1.76 (R10).The conversion rate is: 1 RSI (m2 °C/W) = 5.678 R (ft2°F/BTU).
residential unit
A building or part of a building operated as a housekeeping unit, used or intended to be used by one or more persons and usually containing cooking, eating, living, sleeping and sanitary facilities.
secondary suite
A self-contained residential unit with a prescribed floor area located in a building or portion of a building of only residential occupancy that contains only one other residential unit and common spaces, and where both residential units constitute a single real estate entity.
seasonal energy efficiency ratio (SEER)
A measure of seasonal energy performance for cooling equipment. The cooling output energy in Btu during a typical cooling season divided by the total electric energy input in watt-hours during the same period.
semi-detached
One of a pair of attached residential buildings divided vertically from each other by a common wall, where each building contains not more than one residential unit and a secondary suite.
 
slab on grade foundation
A foundation where the distance between the slab and ceiling is greater than 1.2 m (4 ft.) with the slab at or within 0.6 m (2 ft.) of finished grade.
 
solid fuel
A biomass fuel (in the context of ESNH). 

NOTE: Consistent with definition in CSA B415.1-10 “Performance Testing of Solid-Fuel-Burning Heating
Appliances”, this includes cordwood, wood chips, sawdust, fire logs, wood, paper, other biomass pellets and briquettes, and kernel corn and other grains.

total ventilation capacity
The minimum rate required, averaged over a 24 hour period, at which the ventilation system shall be capable of supplying outdoor air.
triplex
A multi-unit residential building that has 3 stacked residential units.
water heater
Equipment used to produce potable domestic hot water. Its energy efficiency performance is called the energy factor (EF), thermal efficiency (TE) or standby loss (measured in watts). ESNH eligible units are listed on NRCan’s equipment database and either fall under Canada’s Energy Efficiency Regulations, or, in the case of gas-fired instantaneous units, meet CSA-P.7-10 “Test Method for Measuring Energy Loss of Gas-Fired Instantaneous Water Heaters”.

NOTE: NRCan’s database for residential equipment is found at:
http://oee.nrcan.gc.ca/pml-lmp/index.cfm?action=app.welcome-bienvenue

3.2 Abbreviated Terms

ACH - air changes per hour
AFUE - annual fuel utilization efficiency
BOP - Builder Option Package
BTU - British thermal unit
CCBFC - Canadian Commission on Building and Fire Codes
CFL - compact fluorescent light bulb
CFM - cubic feet per minute
CSA - Canadian Standards Association
DWHR - drain water heat recovery
EER - energy efficiency ratio
EF - energy factor
ELA - equivalent leakage area
EPA - Environmental Protection Agency (U.S.) ERV - energy (or enthalpy) recovery ventilator
ESNH - ENERGY STAR® for New Homes
GJ - gigajoule
HRV - heat recovery ventilator
HVI - Home Ventilating Institute
ICF - insulated concrete form
IMS - integrated mechanical system
kWh - kilowatt hour
LPM - litres per minute
MURB - multi-unit residential building
NBC - National Building Code of Canada
NLA - normalized leakage area
NLR50 - normalized leakage rate at 50 pascals
NRCan - Natural Resources Canada
OBC - Ontario Building Code
OSB - oriented strand board
Pa - pascal
SDHW - solar domestic hot water
SEER - seasonal energy efficiency ratio
SIP - structural insulated panel
SL – standby loss
SRE - sensible heat recovery efficiency
TPF – thermal performance factor
ULC - Underwriters Laboratories of Canada
W – watts

4 MINIMUM REQUIREMENTS

4.1 Applicable Regulations

4.1.1 Building Codes and Regulations

The “ENERGY STAR® for New Homes Standard” is not a substitute for local building codes or regulations. It is an additional set of requirements that may be more stringent in the area of energy efficiency. Where a conflict may be present, all local building codes and regulations take precedence over the measures outlined in this Standard. Where building code requirements or regulations exceed those of ESNH, or vice versa, the more stringent requirement shall apply.

4.1.2 Energy Efficiency Regulations

Equipment and products that are regulated in Canada under Canada’s “Energy Efficiency Act” and installed in ESNH housing shall comply with Canada’s “Energy Efficiency Regulations.”

NOTES:

  1. The intent of this requirement is to ensure that all equipment and products installed in ESNH housing meet the CSA standards specified in Canada’s “Energy Efficiency Regulations.”
  2. For more information on Canada’s “Energy Efficiency Regulations”, refer to:  http://oee.nrcan.gc.ca/regulations/17311

4.2 Building Envelope

4.2.1 Airtightness

The house shall be constructed sufficiently airtight such that the whole house air leakage is less than or equal to one of the airtightness targets specified in Table 1, when measured in accordance with the as-operated method based on CAN/CGSB 149.10-M86 “Determination of the Airtightness of Building Envelopes by the Fan Depressurization Method”, as outlined in EnerGuide for Houses: Energy Advisor Workshop Manual (December 2005).

Table 1
Airtightness Targets
Forming Part of 4.2.1
Building Type ACH@50Pa NLA@10 Pa NLR@50 Pa
cm2/m2 in2/100 ft2 L/s/m2 cfm50/ft2
Attached 3.0 2.12 3.06 1.32 0.26
Detached 2.5 1.26 1.81 0.93 0.18

NOTES:

  1. Refer to the “Energy Advisor Workshop Manual (December 2005)” for details on the test method.
  2. MURBs may be considered attached or detached, depending on their configuration. For example, a duplex is considered a detached building, whereas duplexes in a row configuration are considered an attached building. For more information on MURBs, refer to the “Evaluation Procedures for Low-Rise Multi-Unit Residential and Mixed-Used Buildings.”

4.2.2 Opaque Assemblies

4.2.2.1 Minimum Effective Thermal Resistance of Opaque Assemblies

Effective thermal resistance of opaque assemblies shall not be less than those specified in Table 2.

Table 2
Minimum Effective Thermal Resistance of Opaque Assemblies1
Forming Part of 4.2.2.1
Building Assembly Heating Degree Days2
RSI(R)
<3000 3000 - 3999 4000-4999 5000-5999 6000-6999 ≥7000
Ceilings below attics 6.91
(39.2)		 8.67
(49.2)		 8.67
(49.2)		 10.43
(59.2)		 10.43
(59.2)		 10.43
(59.2)
Cathedral ceilings and flat roofs 4.67
(26.5)		 4.67
(26.5)		 4.67
(26.5)		 5.02
(28.5)		 5.02
(28.5)		 5.02
(28.5)
Walls above grade3 2.78
(15.8)		 3.08
(17.5)		 3.08
(17.5)		 3.08
(17.5)		 3.85
(21.9)		 3.85
(21.9)
Floors over unheated spaces 4.67
(26.5)		 4.67
(26.5)		 4.67
(26.5)		 5.02
(28.5)		 5.02
(28.5)		 5.02
(28.5)
Foundation walls below or in contact with the ground 1.99
(11.3)		 2.98
(16.9)		 2.98
(16.9)		 3.46
(19.6)		 3.46
(19.6)		 3.97
(22.5)
Unheated floors below frost line - - - - - -
Unheated floors on ground above frost line4,5,6 1.96
(11.1)		 1.96
(11.1)		 1.96
(11.1)		 1.96
(11.1)		 1.96
(11.1)		 1.96
(11.1)
Heated or unheated floors on ground on permafrost5 - - - - 4.44
(25.2)		 4.44
(25.2)
Heated floors on ground5 2.32
(13.2)		 2.32
(13.2)		 2.32
(13.2)		 2.85
(16.2)		 2.85
(16.2)		 2.85
(16.2)
Slabs on grade with integral footing4,7,8 1.96
(11.1)		 1.96
(11.1)		 1.96
(11.1)		 3.72
(21.1)		 3.72
(21.1)		 4.59
(26.1)

NOTES:

  1. Where local building code values are greater, the local code requirements take precedence, per 4.1.1.
  2. Heating degree days as determined by 1.2.2.1.
  3. Applies to walls that are not common to another heated unit; equally applicable to all references for ‘walls above grade’ requirements found throughout this Standard.
  4. A nominal RSI 1.76 (R10) will meet the RSI 1.96 (R11.1) requirement and a nominal RSI 3.52 (R20) will meet the RSI 3.72 (R 21.1) requirement. 
  5. Applies to the entire area.
  6. Includes non-structural slab on grade.
  7. Except where prohibited by structural requirements of the building code in effect, insulation requirements apply to under the entire slab, and to a 900 mm (3 ft.) skirt of the same nominal value.
  8. Where a slab on grade is also a heated floor, the higher insulation value shall apply.
4.2.2.2 Eligible Insulation Materials
  1. Except as permitted in 4.2.2.2 (b), thermal characteristics of eligible insulation materials shall conform to the requirements of:
    • CAN/CGSB-51.25-M87 “Thermal Insulation, Phenolic, Faced”
    • CGSB 51-GP-27M-1979 “Thermal Insulation, Polystyrene, Loose Fill”
    • CAN/ULC-S701-05 “Thermal Insulation, Polystyrene, Boards and Pipe Covering”
    • CAN/ULC-S702-97 “Mineral Fibre Thermal Insulation for Buildings”
    • CAN/ULC-S703-01 “Cellulose Fibre Insulation (CFI) for Buildings”
    • CAN/ULC-S704-03 “Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced”
    • CAN/ULC-S705.1-01 “Thermal Insulation – Spray Applied Rigid Polyurethane Foam, Medium Density – Material - Specification”
    • CAN/ULC-S706-02 “Wood Fibre Thermal Insulation for Buildings”
    • CAN/ULC-S712.1-10 “Standard for Thermal Insulation – Light Density, Open Cell Spray Applied Semi-Rigid Polyurethane Foam – Material Specification, or
    • CAN/ULC-S716.1-11 “Standard for Exterior Insulation and Finish Systems (EIFS) – Materials and Systems”
  2. For a specific insulation product not conforming to the standards listed in 4.2.2.2 (a), the thermal resistance, or long term thermal resistance values where applicable, are permitted to be used as reported by the Canadian Construction Materials Centre (CCMC) in the evaluation of such a product.
4.2.2.3 Wall and Floor Assemblies Below or in Contact With the Ground
  1. Where the distance between the top of a foundation wall and the line of the finished grade is more than 600 mm (2 ft.), the effective thermal resistance for the above-ground portion of the foundation wall shall be not less than that required for the thermal resistance for walls above grade per 4.2.2.1.
  2. Except as permitted in 4.2.2.3.(c), the below ground portion of insulation required for foundation walls below or in contact with ground shall extend down to the level of the top of the floor that comprises part of the heated boundary.
  3. A gap of not greater than 150 mm (6”) is permitted between the bottom edge of the interior foundation wall insulation and the floor where insulation is provided on the interior face of a foundation wall below or in contact with ground, and where the top of the floor in contact with the ground that comprises part of the heated boundary is equal to or greater than 1.2 m (4 ft.) below finished grade.
  4. The foundation wall insulation is permitted to be split into interior and exterior portions provided the interior and exterior portions each have an effective thermal resistance not less than is required in 4.2.2.1, and they are overlapped a distance of not less than four times the distance separating the planes of insulation. 
  5. Except where prohibited by structural requirements of the building code in effect, or, where there is insulation on the exterior of the foundation wall down to the footing, basement floor assemblies where sub-slab insulation has been installed shall have a thermal break between the basement floor slab and foundation walls with a thermal resistance, at a minimum, equivalent to the sub-slab insulation installed.
4.2.2.4 Ceilings Below Attics

For ceilings below attics under sloped roofs, the thermal resistance shall be continuous to the outermost edge of the exterior wall.

4.2.2.5 Rim Joists

Rim joists shall have a thermal resistance not less than that of walls above grade.

4.2.3 Fenestration and Door SystemsFootnote 3

4.2.3.1 Fenestration
  1. With the exception of 4.2.3.1(b) and (c), windows and skylights, including tubular skylights, shall be ENERGY STAR® qualified for the climate zone in which they are installed.
    NOTE: Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to: http://nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  2. Windows in walls below or in contact with the ground, where the distance from the top of the floor in contact with the ground below the window and the line of the finished ground is equal to or greater than 1.2 m (4 ft.), need not comply with 4.2.3.1(a) but shall meet the following requirements, at a minimum:
    1. double-glazed with low-e glass,
    2. inert gas-filled,
    3. have an insulated spacer, and
    4. if the frame or sash is made from metal, it shall be thermally broken.
  3. Houses enrolled before 1 April 2016 may use one climate zone lower (e.g. Zone 1 is allowed in lieu of Zone B); after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Decorative windows, including side lights, integrated glazing in doors, half-circle windows, leaded windows, transoms and other specialty glazing products, need not comply with 4.2.3.1 (a) provided that the total glazing area of such decorative glazing does not exceed 1.85 m2 (20 ft2).
    NOTE: Fenestration in door systems, e.g., integrated glazing, sidelights and transoms, applies only to the door system not covered under 4.2.3.2 (b).
4.2.3.2 Door Systems
  1. With the exception of 4.2.3.2(b) and (c), exterior door systems shall be ENERGY STAR® qualified for the climate zone in which they are installed.
    NOTE: Climate zones for ENERGY STAR® doors are defined in “Climate Zones – ENERGY STAR®,” refer to: http://nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  2. A maximum of one exterior door system (to a maximum of one single or one double door) that does not comply with 4.2.3.2(a) is permitted per house.
  3. Doors to unheated enclosed spaces shall have an insulated core and be installed with weatherstripping. 
    NOTE: This requirement includes, but is not limited to, doors to cold cellars and doors to attached garages.

4.3 Space Heating and Cooling Equipment

4.3.1 Integrated Mechanical Systems

Where installed, an integrated mechanical system (IMS) shall be:

  1. of the condensing type, and
  2. tested according to CSA P.10-07 “Performance of Integrated Mechanical Systems for Residential Heating and Ventilation” and meet or exceed the Standard's premium performance requirements.

4.3.2 Combined Space and Water Heating Systems

Where installed, a combined space and water heating system shall be:

  1. of the condensing type, and
  2. tested by a third party accredited by the Standards Council of CanadaFootnote 4 according to CSA P.9-11 “Test method for determining the performance of combined space and water heating systems (combos)” (applies to forced-air space heating systems only).

NOTES:

  1. CSA P.9-tested systems are listed at: http://oee.nrcan.gc.ca/pml-lmp/index.cfm?action=app.search-recherche&appliance=P9COMBO.

4.3.3 Natural Gas or Propane Fireplaces

Where installed, natural gas or propane fireplaces shall be direct-vent with spark ignition (also referred to as “intermittent” or “on-demand”).

NOTES:

  1. For eligible products, refer to: http://oee.nrcan.gc.ca/residential/business/manufacturers/search/fireplace-search.cfm
  2. Standing pilot light types may be used in the performance approach, but the pilot light usage must be accounted for.

4.3.4 Solid-Fuel-Burning Appliances

NOTES:

  1. Coal products are not permitted.
  2. When used for primary heating purposes, appliances under 4.3.4 must be modelled by following the performance approach.
4.3.4.1 Indoor Automatically-Fuelled Appliances

Where installed, automatically-fuelled appliances, including pellet stoves, central pellet furnaces and boilers, and pellet fireplaces, shall have:

  1. a flue/vent that has a minimum vertical rise of 1.5 m (5 ft.), measured from the appliance flue collar to the exterior termination centre line of the flue/vent, and
  2. no barometric dampers.
4.3.4.2 Indoor Manually-Fuelled Appliances

Where installed, indoor manually-fuelled appliances, including stoves, fireplaces, fireplace inserts, and central furnaces and boilers, shall:

  1. be certified to:
    1. CAN/CSA-B415.1-10 “Performance testing of solid-fuel-burning heating appliances”, or
    2. U.S. Environmental Protection Agency (EPA) 40 Code of Federal Regulations (CFR) Part 60 Subpart AAA - Standards of Performance for New Residential Wood Heaters, and have no barometric dampers.
  2. have no barometric dampers.
4.3.4.3 Outdoor Central Heating Appliances

Where installed, outdoor central heating appliances, such as hydronic heaters and furnaces, shall be certified to:

  1. CAN/CSA-B415.1-10 “Performance testing of solid-fuel-burning heating appliances”, or
  2. U.S. Environmental Protection Agency (EPA) 40 Code of Federal Regulations (CFR) Part 60 Subpart AAA - Standards of Performance for New Residential Wood Heaters, or
  3. Phase 2 EPA Hydronic Heater Program (White tag)Footnote 5
4.3.4.4 Masonry Heaters

Where installed, masonry heaters shall be constructed with:

  1. tight-fitting fuel loading doors that are closed during the burn cycle,
  2. combustion air control providing high-fire burn only,
  3. a minimum mass of 800 kg (1760 lbs),
  4. a firebox and heat exchange channels built from refractory components with an overall average wall thickness not exceeding 250 mm (10”),
  5. a gas path through the internal heat exchange channels downstream of the firebox with at least one 180-degree change in flow direction before entering the chimney, and
  6. the length of the shortest single path from the firebox exit to the chimney entrance at least twice the largest firebox dimension.

NOTE: Site-built fireplaces, with the exception of masonry heaters as specified in 4.3.4.4, are not permitted in ESNH houses.

4.4 Drain Water Heat Recovery

Where installed, drain water heat recovery (DWHR) units shall:

  1. be installed according to the manufacturer’s instructions,
  2. recover heat from at least one shower stack, and
  3. be listed on NRCan’s website at: http://oee.nrcan.gc.ca/pml-lmp/index.cfm?action=app.search-recherche&appliance=DWHR

4.5 Solar Domestic Hot Water

Where installed, solar domestic hot water (SDHW) units shall be certified to:

  1. CSA F379 Series-09 “Packaged Solar Domestic Hot Water Systems”, and
  2. CSA F378.1-11 “Glazed and unglazed liquid heating solar collectors - Test methods”.

NOTES:

  1. The CSA F378.1-11 Standard applies to: (a) glazed flat plate liquid heating solar collectors; (b) glazed vacuum tube or vacuum envelope liquid heating solar collectors; (c) unglazed flat plate liquid heating solar collectors; (d) integral collector storage (ICS) systems with time constants of less than 30 minutes; and (e) concentrating collectors with an acceptance angle greater than 60°.
  2. Products that met CAN/CSA F378-87 (R2004) “Solar Collectors” are also permitted; refer to: http://directories.csa-international.org/cert_rec_srch.asp?sort=name&txtDir=*&Submit=Search&txtCustomer=&txtProvState=&txtCountry=&txtFile=&txtMajorClass=8854&txtMinorClass=01
  3. A performance directory of solar domestic hot water systems certified to CSA F379 can be found at: http://www.nrcan.gc.ca/energy/renewable-electricity/solar-thermal/7337
  4. MURBs do not need to comply with (a).

4.6 Venting and Combustion Air Supply of Fuel-Fired Equipment

4.6.1 Natural Gas-Fired and Propane-Fired Equipment

Where installed, natural gas-fired and propane-fired space and water heating equipment shall be:

  1. equipped with electronic ignition, and
  2. independently vented with a sealed vent connected to a:
    1. direct-vent system, or
    2. mechanically-vented system.

NOTE: The intent of this requirement is to reduce the possibility for combustion spillage, thereby reducing health and safety risk to the occupants. Naturally-aspirated appliances or appliances with standing pilot lights do not meet this requirement.

4.6.2 Oil-Fired Equipment

Where installed, oil-fired space and water heating equipment shall be independently vented with a sealed-vent connected to a: 

  1. direct-vent system,
  2. forced-draft system, or
  3. terminally mounted induced-draft power venter. 

NOTE: The intent of this requirement is to reduce the possibility for combustion spillage, thereby reducing health and safety risk to the occupants. Naturally-aspirated appliances or barometric dampers do not meet these requirements.

4.6.3 Combustion Air Supply

  1. Combustion air supply ducts and damper systems shall serve no more than one piece of equipment.
  2. Combustion air supply for space or water heating equipment terminating in conditioned space shall be equipped with an approved device to control unintended air leakage when air is not required for combustion.

NOTE: This requirement does not apply to natural gas-fired or propane-fired water heating equipment.

4.7 Ventilation and Distribution Systems

4.7.1 Ventilation Systems

4.7.1.1 Principal Ventilation Capacity

The principal ventilation capacity for residential units shall be achieved through either a heat recovery ventilator (HRV), an energy recovery ventilator (ERV), or integrated mechanical system (IMS).

4.7.1.2 HRV/ERV Requirements

(a) The HRV/ERV shall be:

  1. certified by the Home Ventilating Institute (HVI) as an HRV or ERV, or be ENERGY STAR qualified,
  2. tested at 0 °C and -25 °C, and
  3. installed such that the supply and exhaust flows are measured and balanced within 10% at high speed, with a label attached to the equipment indicating the installing company and the measured flow rates.

(b) The sensible heat recovery efficiency (i.e. that which is either modelled under the Performance Approach or selected from a BOP table under the Prescriptive Approach) shall be taken at an airflow rate greater than or equal to the airflow rate indicated in Table 3.

NOTE: The applicable SRE corresponding to the airflow rate indicated in Table 3 can also be determined by interpolating between two airflow rates. Extrapolation of SRE values beyond those reported in the HVI Directory is not allowed.

Table 3
Minimum Airflow Rates
Forming Part of 4.7.1.2 (b)
Number of Bedrooms Minimum Airflow Rate
(at 0 °C)
L/s CFM
1 16 34
2 18 38
3 22 47
4 26 55
5 30 64
> 5 As per good practice such as that described in CAN/CSA-F326-M91 (R2010) “Residential Mechanical Ventilation Systems”

NOTES:

  1. The applicable airflow rate is determined by the number of bedrooms that was used in the design of the ventilation system.
  2. For a listing of products, refer to Section 3 in the HVI “Certified Home Ventilating Products Directory”, available at: http://hvi.org/proddirectory/index.cfm.
  3. For a listing of ENERGY STAR® qualified equipment, refer to: http://www.nrcan.gc.ca/energy/products/energystar/why-buy/13631.
4.7.1.3 IMS Requirements

The IMS ventilation energy recovery module shall be installed such that the supply and exhaust flows are measured and balanced within 10% at high speed, with a label attached to the equipment indicating the installing company and the measured flow rates.

4.7.1.4 Integrated HRV Air Handler Requirements

Integrated HRV air handlers shall:

  1. be tested to Section 8 of CSA P.10-07 “Performance of Integrated Mechanical Systems for Residential Heating and Ventilation”, and
  2. have a defrost mechanism.
4.7.1.5 Ventilation of Public Corridors in MURBs

Public corridors that serve more than one residential unit shall:

  1. have a ventilation rate not less than 0.3 L/s/m2 (0.06 cfm/ft2), with ventilation air supplied by one or more HRV/ERVs with an SRE at the design flow rate that is not less than that which is required for the HRV/ERV in an individual residential unit, and
  2. have airtight gaskets or weatherstripping on doors between each residential unit and the corridor.

NOTE: The ventilation rate is consistent with ASHRAE 62.1-2010 “Ventilation for Acceptable Indoor Air Quality.” 

4.7.2 Distribution Systems

4.7.2.1 Interconnection to Forced-Air Distribution System

Where a central forced air system is utilized either fully or in part to distribute ventilation air, the principal exhaust fan control shall be interconnected with the forced air distribution system such that switching on the principal exhaust fan operates the forced air distribution fan.

4.7.2.2 Duct Location

All ducts for heating, ventilation and air conditioning shall be located within the heated boundary, where the heated boundary shall have a thermal resistance not less than that provided in Table 2.

NOTES:

  1. The intent of this requirement is to ensure that there is full insulation between the duct and the exterior surface of the opaque assembly.
  2. This requirement does not pertain to exhaust-only ventilation.
4.7.2.3 Duct Sealing
  1. Except for 4.7.2.3(d), heating and cooling system ducts shall be sealed as follows:
    1. seal all supply transverse joints, branch take-offs, branch supply joints and manufactured beaded joints on round perimeter pipes located on all floors.
    2. for common return ducts, the more stringent of (1) or (2) shall apply:
      1. The drop to the furnace and at least one horizontal metre of return duct(s) measured from the furnace/air handler connection must be sealed with tape or mastic approved for the application; or
      2. Within a framed or closed mechanical room, all the return ducts, including joist returns, must be sealed with tape or mastic approved for the application.
    NOTE: See Figure 1 for an illustration of these requirements.
  2. HRV/ERV, integrated HRV air handlers, and IMS connections to the outdoor vent hoods must be sealed and insulated.
  3. For dedicated fully ducted ventilation ductwork (e.g., HRV/ERV ducts), all manufactured and site assembled joints must be sealed.
  4. The following joints are exempt from additional sealing: self-sealing manufactured pipe, take-offs, and fittings (with manufactured seal or incorporated gaskets); snap lock and folded seam longitudinal duct joints; and knurled adjustable joints on manufactured elbows.

Figure 1: Duct Sealing Requirements

Duct Sealing Requirements

Forming Part of 4.7.2.3 (a) (ii)

Text version

Figure 1: Duct Sealing Requirements

This is a picture of a furnace/air handler in a mechanical room. The furnace/air handler supply air flows up into the rectangular supply-air trunk ductwork which has four round branch line take offs. The rectangular return trunk duct horizontally enters the mechanical room from the right about half way up the wall then turns and drops vertically down very close to the furnace/air handler where it is attached to the bottom of the furnace/air handler.

There are two arrows pointing at the branch line take-offs and joints. The caption reads: “Branch line take-offs and joints”. There are three arrows pointing at the joints on the rectangular supply-air trunk ductwork, the joint around the top furnace/air handler to plenum connection and a joint along the return trunk duct. The caption reads: “Transverse joints (e.g. S and drive cleat joints) in trunks and all joints on plenum”.

There are two representational lines (labelled 1 and 2) on the floor starting beside the furnace/air handler and running parallel to the return trunk duct. Line 1 measures one horizontal metre of return trunk duct that includes the drop section beside the furnace/air handler. Line 2 measures the entire horizontal length of return trunk duct within the mechanical room, traveling the distance from the furnace/air handler connection to the inside edge of the wall from which the return ducts enters.

 
4.7.2.4 Solar Hot Water System Distribution

Where distribution piping for solar hot water systems is located in an unconditioned space, they shall be thermally insulated to the greater of:

  1. the manufacturer’s installation specifications, or
  2. RSI 0.5 (R3)

4.8 Electrical Savings

All ENERGY STAR qualified homes must have new equipment or products installed that provide a minimum of 400 kWh/yr, per residential unit, of electrical savings using measures specified in Table 4.

Table 4

Eligible Electrical Savings
Forming Part of 4.8
Measure kWh/yr
Air Conditioning1
Options per climate zone See relevant tables in Section 6
Appliances2
ENERGY STAR® qualified dishwasher 20
ENERGY STAR® qualified clothes washer 25
ENERGY STAR® qualified freezer 40
ENERGY STAR® qualified refrigerator 50
Lighting – ENERGY STAR® qualified fixtures or light bulbs3
Individual Rooms Kitchen 70
Dining 70
Living room 40
Family room 60
Main hallway and bathroom 50
Bedrooms4 15
Basement 5
75% of the entire house5 295
Entire house5 420
Ventilation
ENERGY STAR® qualified bathroom fan6 10 to 89 cfm 5
≥90 cfm 10
ENERGY STAR® qualified range hood 30
HRV/ERV fan efficacy
  SRE <75% @0 °C ≥0.57 L/s/W (1.2 cfm/W)7 110
  SRE ≥75% @0 °C ≥0.38 to <0.47 L/s/W (≥0.8 cfm/W to <1.0 cfm/W)7 30
≥0.47 L/s/W (1.0 cfm/W) 140

NOTES:

  1. Room air conditioners, including through-the-wall units, window-mounted units, and portable units are not eligible for electrical savings.
  2. Savings are limited to one appliance per appliance type.
  3. Where applied, builders must choose from either individual rooms, or 75% of the entire house, or the entire house.
  4. All bedrooms in the house must comply in order to qualify.
  5. Applies to all lighting in the house, including decorative, stair and exterior lighting.
  6. All bathrooms must comply in order to qualify. Where there are fans at both cfm levels, the higher level shall apply.
  7. Fan efficacy levels are equivalent to Version 1.0, Tier 2 ENERGY STAR specifications.

5 Compliance Options

5.1 Performance Approach

5.1.1 General

ENERGY STAR® qualified homes built following the performance approach shall comply with 5.1.2 and 5.1.4 in addition to meeting the minimum requirements laid out in Section 4.

5.1.2 Energy Target

ENERGY STAR® qualified homes built following the performance approach shall comply with the performance targets that apply to the relevant climate zone and region, as provided in Section 6.

NOTES:

  1. The evaluation conducted under the Performance Approach is limited to the specific house that is modelled and labelled.
  2. Performance targets for additional regions are under development and will be added to Section 6 once they are completed.

5.1.3 Approved Compliance Software

The energy target in 5.1.2 shall be assessed using HOT2000 Version 10.51, unless otherwise specified in Section 6.

5.1.4 Energy Credits

Where applicable, ENERGY STAR® qualified homes following the performance approach shall apply energy credits per NRCan’s “New Housing Programs’ 2012 Energy Credits.”

5.2 Prescriptive Approach

5.2.1 General

ENERGY STAR® qualified homes built following the prescriptive approach shall comply with 5.2.2 to 5.2.4 in addition to meeting the minimum requirements laid out in Section 4.

NOTES:

  1. The Prescriptive Approach allows a builder to choose a Builder Option Package (BOP) that has been pre-determined to meet, on average, the energy performance specifications for an ENERGY STAR® qualified new home. No modelling is required under this approach.
  2. Refer to Section 6 for BOP details. BOPs for additional provinces and territories are under development and will be added to Section 6 once they are completed.

5.2.2 Builder Option Packages

  1. ENERGY STAR qualified homes shall comply with the Builder Option Packages (BOP) for the relevant region and climate zone per Section 6.
  2. The lowest level of the following, installed in a building or a unit of a building shall be applied for the purpose of compliance:
    1. thermal resistance of an opaque assembly,
    2. ENERGY STAR climate zone for windows and doors, and
    3. Efficiency of mechanical equipment
  3. For airtightness in MURBs, the following shall apply:
    1. For MURBs with one to three zones:
      1. Level 2, 3, 4 or 5, per Appendix A, can be applied if the ACH threshold is met using one of the methods described in the MURBs ProceduresFootnote 6, or
      2. Level 2, 3, 4 or 5, per Appendix A, can be applied if the NLA or NLR threshold for whole building or when performing blower door tests per the MURB Procedures for one, two or three zones. Note that pressure is required to be taken in all zones during the test.
    2. For MURBs with four or more zones:
      1. Level 2, 3, 4 or 5, per Appendix A, can be applied if the ACH threshold is met using the method described in the MURBs Procedures, or,
      2. Level 2, per Appendix A, can be applied if the NLA or NLR threshold for Level 2 is met.

NOTES:

  1. BOPs are applied on a per building basis. In cases where measures in MURBs, such as attic insulation, can only be applied in some units, these measures may be used for meeting compliance for the whole building. Measures that normally apply to each unit, such as windows or mechanical equipment (e.g. space heating/cooling, domestic water heaters, ventilation) are to be applied to all units.
  2. Refer to the BOP Options tables for special conditions that apply to certain measures including HRVs, SDHW and DWHR.

5.2.3 Effective Thermal Resistance of Opaque Assemblies

  1. Opaque assemblies shall be constructed to achieve the applicable effective thermal resistance levels specified in the applicable BOP, as calculated by following the procedures provided in ”ENERGY STAR® for New Homes Tables for Calculating Effective Thermal Resistance of Opaque Assemblies, Effective December 2012” to achieve the effective thermal resistance levels in the applicable BOP.
  2. Where a component of the building envelope is protected by an enclosed unconditioned space, such as a sun porch, enclosed veranda, vestibule or attached garage, the thermal buffering effect of said space shall be considered to be RSI 0.16 (R 0.9).

NOTES:

  1. For the purposes of this clause, enclosed unconditioned spaces also include heated garages.
  2. When calculating the overall thermal resistance of an opaque assembly for demonstrating compliance with Section 6, the thermal buffering effect of the enclosed unconditioned space can be considered as a continuous material with a thermal resistance of RSI 0.16 (R 0.9), provided this is in accordance with local building codes and regulations.

5.2.4 Window to Wall Ratio

The total area of all windows, sliding glass doors and skylights is limited to a maximum of 20% of the above grade wall area. Exceeding the applicable limit precludes use of the prescriptive approach.

NOTE: The total area referred to is the sum of all the areas of the structural rough openings for the windows, sliding glass doors and skylights, as well as transoms and sidelights.

6 Regional Specifications

6.1 Alberta

6.1.1 Climate Zones for Alberta

The climate zones for 6.1.2, 6.1.3 and 6.1.4 are defined by Table 5.

Table 5
ESNH Climate Zones for Alberta
Forming Part of 6.1.1
Region Heating Degree Days1
ESNH AB Zone 1 <5000
ESNH AB Zone 2 5000-5999
ESNH AB Zone 3 ≥6000

NOTE:

  1. As determined by 1.2.2.1.

6.1.2 Electrical Savings Options for Alberta

Table 6 shall be used to determine electrical savings from air conditioning for Alberta for determining compliance to 4.8.

Table 6
Electrical Savings from Air Conditioning for Alberta
Forming Part of 4.8 and 6.1.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH AB Zone 1 36 70
ESNH AB Zone 2 16 30
ESNH AB Zone 3 25 45

6.1.3 Performance Targets for Alberta

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 7.

Table 7
Minimum EnerGuide Rating under the Performance Approach for Alberta
Forming Part of 6.1.3
House Type HOT2000 version Minimum ERS Target
ESNH AB Zone 1 ESNH AB Zone 2 ESNH AB Zone 3
All 10.51 82 82 82

6.1.4 Builder Option Packages for Alberta

Apply all BOP elements for the applicable climate zone, per Table 8.

Table 81,2
Alberta Core BOP
Forming Part of 6.1.4
Item ESNH AB
Zone 1		 ESNH AB
Zone 2		 ESNH AB
Zone 3
RSI (R) RSI (R) RSI (R)
Ceilings below attics 8.67 (49.2) 10.43 (59.2) 10.43 (59.2)
Cathedral ceilings and flat roofs 4.67 (26.5) 5.02 (28.5) 5.02 (28.5)
Walls above grade 3.08 (17.5) 3.08 (17.5) 3.85 (21.9)
Floors over unheated spaces 4.67 (26.5) 5.02 (28.5) 5.02 (28.5)
Foundation walls below or in contact with the ground 2.98 (16.9) 3.46 (19.6) 3.46 (19.6)
Unheated floors on ground above frost line 1.96 (11.1) 1.96 (11.1) 1.96 (11.1)
Heated or unheated floors on ground on permafrost n/a n/a 4.44 (25.2)
Heated floors on ground 2.32 (13.2) 2.85 (16.2) 2.85 (16.2)
Slab on grade with integral footing 1.96 (11.1) 3.72 (21.1) 3.72 (21.1)
Fenestration3 ENERGY STAR
Zone B or Zone 1		 ENERGY STAR
Zone B or Zone 1		 ENERGY STAR Zone C or Zone 2
Space heating 95% AFUE ENERGY STAR furnace or boiler4
Air-source heat pump (ASHP), or
Ground-source heat pump (GSHP)
Water heating Fuel-fired: 0.67 EF4
Ventilation5 60% SRE @ 0 °C; 55% SRE @ -25 °C
Electrical savings6 400 kWh/yr
Option points required7 2.0 2.1 1.9

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values.
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it.
  3. Climate zones for ENERGY STAR fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Cannot be used in combined space and water heating configurations.
  5. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  6. Select a minimum of 400 kWh/yr of measures from Table 4 or Table 6.
  7. Select options from Table 9 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 91
Alberta BOP Options
Forming Part of 6.1.4
Category Item ESNH AB Zone 1 ESNH AB Zone 2 ESNH AB Zone 3
Ceilings2 Ceilings Below Attic (100%) R 52 (nominal) at heel w/ R60 (nominal) 0.1 n/a n/a
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.1 n/a n/a
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 Attic-R 60 (nominal); flat/cathedral-R 40 (nominal) 0.1 n/a n/a
Walls Above Grade   RSI 3.41 (R 19.4) 0.5 0.6 n/a
RSI 3.59 (R 20.4) 0.6 0.7 n/a
RSI 3.78 (R 21.5) 0.9 1.0 n/a
RSI 3.90 (R 22.1) 1.0 1.1 0.1
RSI 4.03 (R 22.9) 1.0 1.2 0.2
RSI 4.48 (R 25.4) 1.4 1.5 0.6
RSI 4.79 (R 27.2) 1.6 1.8 0.8
Foundation Walls RSI 3.67 (R 20.8) 0.3 0.1 0.1
RSI 3.94 (R 22.4) 0.5 0.3 0.3
RSI 4.19 (R 23.8) 0.5 0.3 0.3
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.1 0.3 0.3
RSI 1.76 (R 10.0) full slab 0.2 0.4 0.3
Fenestration5 ENERGY STAR® Zone C or Zone 2 0.1 0.2 n/a
ENERGY STAR® Zone D or Zone 3 0.3 0.4 0.3
Airtightness6 Level 2 0.4 0.4 0.4
Level 3 0.7 0.8 0.9
Level 4 1.1 1.2 1.3
Airtightness +
HRV/ERV6,7		 Level 4+ ≥84% SRE @ 0 °C 1.8 1.9 2.0
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C max. 1.8 max. 1.9 max. 2.0
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1 0.1 n/a
≥75 to <84% SRE @ 0 °C 0.3 0.3 0.2
≥84% SRE @ 0 °C 0.4 0.4 0.4
HRV/ERV – MURBs7,8   65 to <75% SRE @ 0 °C max. 0.1 max. 0.1 n/a
≥75 to <84% SRE @ 0 °C max. 0.3 max. 0.3 max. 0.2
≥84% SRE @ 0 °C max. 0.4 max. 0.4 max. 0.4
Domestic Water Heating9 Instantaneous min. EF 0.82 0.6 0.5 0.5
Instantaneous condensing min. EF 0.90 0.8 0.7 0.7
Instantaneous condensing min. EF 0.95 0.9 0.8 0.8
Tank condensing min. EF 0.80 0.7 0.7 0.7
Tank condensing min. TE 90% 0.7 0.7 0.7
Tank condensing min. TE 94% 0.8 0.7 0.7
SDHW Attached/Detached: ≥6000 MJ/yr 1.0 0.9 0.7
MURBs: ≥3000 MJ/yr/unit10 1.0 0.9 0.7
DWHR11 30 to <42% steady state – one shower 0.4 0.4 0.4
30 to <42% steady state – two showers 0.8 0.8 0.7
≥42% steady state – one shower 0.6 0.5 0.5
≥42% steady state – two showers 1.1 1.0 0.9
DWHR – MURBs12 30.0 to <42.0% steady state – one shower 0.1 or max. 0.4 0.1 or max. 0.4 0.1 or max. 0.4
≥ 42.0% steady state – one shower 0.1 or max. 0.6 0.1 or max. 0.5 0.1 or max. 0.5
Electrical Savings 150 kWh/yr 0.1 0.1 0.1

  NOTES:

  1. Thermal resistance requirements are listed in effective values, unless otherwise indicated with (nominal) for nominal value. An ‘n/a’ indicates that an upgrade is not possible, likely due to a higher core BOP requirement.
  2. Only one of the three sub-categories under Ceilings may be chosen.
  3. Where both ceilings below attics and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level.
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. BOP points are calculated as follows: [(max. points) / (# MURB units in building)] * [# HRVs].
  9. This option applies only to stand-alone water heaters and not those that form part of a combined space and water heating system.
  10. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  11. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception,: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all showers in the house. The maximum allowable amount is two showers.
  12. BOP points are calculated as follows: 0.1 or [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater.

6.2 British Columbia

6.2.1 Climate Zones for British Columbia

The climate zones for 6.2.2, 6.2.3 and 6.2.4 are defined by Table 10.

Table 10
ESNH Climate Zones for British Columbia
Forming Part of 6.2.1
Region Heating Degree Days1
ESNH BC Zone 1 2999
ESNH BC Zone 2 3000-3999
ESNH BC Zone 3 4000-4999
ESNH BC Zone 4 5000-5999
ESNG BC Zone 5 ≥6000

NOTE:

  1. As determined by 1.2.2.1.

6.2.2 Electrical Savings Options for British Columbia

Table 11 shall be used to determine electrical savings from air conditioning for British Columbia for determining compliance to 4.8.

Table 11
Electrical Savings from Air Conditioning for British Columbia
Forming Part of 4.8 and 6.2.2

Climate Zone		 ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH BC Zone 1 17 32
ESNH BC Zone 2 80 150
ESNH BC Zone 3 15 30
ESNH BC Zone 4 26 48
ESNH BC Zone 5 16 29

6.2.3 Performance Targets for British Columbia

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 12.

Table 12
Minimum EnerGuide Rating under the Performance Approach for British Columbia
House Type HOT2000 version Minimum ERS Target
ESNH BC Zone 1 ESNH BC Zone 2 ESNH BC Zone 3 ESNH BC Zone 4 ESNH BC Zone
5
All 10.51 81 81 81 81 81

6.2.4 Builder Option Packages for British Columbia

Apply all BOP elements for the applicable climate zone, per Table 13.

Table 131,2
British Columbia Core BOP
Forming Part of 6.2.4
Item ESNH BC Zone 1 ESNH BC Zone 2 ESNH BC Zone 3 ESNH BC Zone 4 ESNH BC Zone 5
RSI (R) RSI (R) RSI (R) RSI (R) RSI (R)
Ceilings below attics 6.91 (39.2) 8.67 (49.2) 8.67 (49.2) 10.43 (59.2) 10.43 (59.2)
Cathedral ceilings and flat roofs 4.67 (26.5) 4.67 (26.5) 4.67 (26.5) 5.02 (28.5) 5.02 (28.5)
Walls above grade 2.78 (15.8) 3.08 (17.5) 3.08 (17.5) 3.08 (17.5) 3.85 (21.9)
Floors over unheated spaces 4.67 (26.5) 4.67 (26.5) 4.67 (26.5) 5.02 (28.5) 5.02 (28.5)
Foundation walls below or in contact with the ground 1.99 (11.3) 2.98 (16.9) 2.98 (16.9) 3.46 (19.6) 3.46 (19.6)
Unheated floors on ground above frost line 1.96 (11.1) 1.96 (11.1) 1.96 (11.1) 1.96 (11.1) 1.96 (11.1)
Heated or unheated floors on ground or permafrost n/a n/a n/a n/a 4.44 (25.2)
Heated floors on ground 2.32 (13.2) 2.32 (13.2) 2.32 (13.2) 2.85 (16.2) 2.85 (16.2)
Slab on grade with integral footing 1.96 (11.1) 1.96 (11.1) 1.96 (11.1) 3.72 (21.1) 3.72 (21.1)
Fenestration3 ENERGY STAR® Zone A or Zone 1 ENERGY STAR® Zone A or Zone 1 ENERGY STAR® Zone B or Zone 1 ENERGY STAR® Zone B or Zone 1 ENERGY STAR® Zone C or Zone 2
Space Heating
  • Electric resistance heater with line voltage thermostat4,
  • 92% AFUE furnace or boiler,
  • Air-source heat pump,
  • Ground-source heat pump
Domestic Water Heating5 Electric:
  • 50L- 270L, bottom inlet, max. SL ≤ 66 W
  • 50L- 270L, top inlet, max. SL ≤61W
  • >270L-454L, bottom inlet, max. SL ≤ 89 W + heat trap (on outlet only) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)
  • >270L-454L, top inlet, max. SL ≤ 84 W + heat trap (on both inlet and outlet) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)
Fuel-fired: 0.67 EF
Combined Space and Water Heating TPF 0.85 TPF 0.86 TPF 0.86 TPF 0.87 TPF 0.87
92% AFUE boiler6
Ventilation7 60% SRE @ 0°C; 55% SRE @ -25°C
Electrical savings8 400 kWh/yr
Option points required9 2.5 2.6 2.5 2.6 2.6

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values.
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it.
  3. Climate zones for ENERGY STAR fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications.13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B) however Zone A fenestration will continue as Zone 1 fenestration.
  4. Line voltage thermostat shall be certified to C828-13 “Performance requirements for thermostats used with individual room electric space heating devices”.
  5. Cannot be used in combined space and water heating configurations.
  6. Can only be used where the distribution system is one hundred percent (100%) hydronic.
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. Select a minimum of 400 kWh/yr of measures from Table 4 or 11.
  9. Select options from Table 14 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 141

British Columbia BOP Options
Forming Part of 6.2.4

Category Item ESNH BC Zone 1 ESNH BC Zone 2 ESNH BC Zone 3 ESNH BC Zone 4 ESNH BC Zone 4
Ceilings2 Ceilings Below Attic (100%) R 42 (nominal) at heel n/a 0.1 n/a n/a n/a
R 60 (nominal) 0.3 0.1 0.1 n/a n/a
R 52 (nominal) at heel w/ R 60 (nominal) 0.3 0.2 0.2 0.1 0.1
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.3 0.1 0.1 n/a n/a
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 R 42 (nominal) at heel 0.3 0.1 0.1 n/a n/a
Attic-R 60 (nominal); flat/cathedral-R 40 (nominal) 0.3 0.1 0.1 n/a n/a
R 52 (nominal) at heel w/R 60 (nominal) in attic; flat/cathedral-R40 (nominal) 0.3 0.2 0.2 0.1 0.1
Walls Above Grade RSI 3.41 (R 19.4) 1.0 0.6 0.6 0.6 n/a
RSI 3.59 (R 20.4) 1.0 0.6 0.7 0.7 n/a
RSI 3.78 (R 21.5) 1.3 0.9 1.0 1.0 n/a
RSI 3.90 (R 22.1) 1.3 0.9 1.0 1.1 0.1
RSI 4.03 (R 22.9) 1.4 1.4 1.1 1.2 0.2
RSI 4.48 (R 25.4) 1.7 1.3 1.4 1.6 0.6
RSI 4.79 (R 27.2) 1.9 1.6 1.7 1.8 0.8
Foundation Walls RSI 3.67 (R 20.8) 0.7 1.3 0.3 0.1 0.1
RSI 3.94 (R 22.4) 0.9 0.5 0.5 0.3 0.3
RSI 4.19 (R 23.8) 0.9 0.5 0.5 0.3 0.3
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.2 0.1 0.1 0.3 0.3
RSI 1.76 (R 10.0) full slab 0.3 0.2 0.2 0.4 0.4
Fenestration5 ENERGY STAR® Zone B or Zone 1 0.9 1.0 n/a n/a n/a
ENERGY STAR® Zone C or Zone 2 1.0 1.1 0.2 0.2 n/a
ENERGY STAR® Zone D or Zone 3 1.2 1.4 0.5 0.5 0.4
Airtightness6 Level 2 0.3 0.3 0.3 0.4 0.4
Level 3 0.5 0.6 0.7 0.7 0.9
Level 4 0.7 0.8 1.0 1.1 1.3
Level 5 1.0 1.1 1.3 1.5 1.8
Airtightness +
HRV/ERV6,7		 Level 4 or 5 + ≥84% SRE @ 0 °C 1.3 1.7 1.8 2.0 2.2
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C max. 1.3 max. 1.7 max. 1.8 max. 2.0 max. 2.2
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1 0.2 0.1 0.1 0.1
≥75 to <84% SRE @ 0 °C 0.3 0.4 0.4 0.4 0.3
≥84% SRE @ 0 °C 0.5 0.7 0.7 0.6 0.6
HRV/ERV – MURBs7,8 65 to <75% SRE @ 0 °C max. 0.1 max. 0.2 max. 0.1 max. 0.1 max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.3 max. 0.4 max. 0.4 max. 0.4 max. 0.3
≥84% SRE @ 0 °C max. 0.5 max. 0.7 max. 0.7 max. 0.6 max. 0.6
Domestic
Water Heating10		 Heat trap and pipe insulation (3m w/ RSI 0.70 (R4))9 0.1 0.1 0.1 n/a n/a
ENERGY STAR qualified heat pump water heater 1.2 1.2 1.1 1.0 0.9
Instantaneous min. EF 0.82 0.6 0.6 0.5 0.5 0.6
Instantaneous condensing min. EF 0.90 0.8 0.8 0.7 0.7 0.7
Instantaneous condensing min. EF 0.95 0.9 0.9 0.8 0.8 0.8
Tank condensing min. EF 0.80 0.8 0.7 0.7 0.7 0.8
Tank condensing min. TE 90% 0.7 0.6 0.7 0.7 0.7
Tank condensing min. TE 94% 0.8 0.7 0.7 0.7 0.8
Combined Space and Water Heating System11 TPF 0.92 0.6 0.8 0.7 0.8 0.8
SDHW Attached/Detached: ≥6000 MJ/yr 1.2 1.3 1.1 1.0 1.0
MURBs: ≥3000 MJ/yr/unit12 1.2 1.3 1.1 1.0 1.0
DWHR13 30.0 to <42.0% steady state – one shower 0.5 0.6 0.5 0.4 0.4
30.0 to <42.0% steady state – two showers 1.1 1.0 0.9 0.8 0.8
≥42.0 to <55.0% steady state – one shower 0.7 0.7 0.6 0.6 0.5
≥42.0 to <55.0% steady state – two showers 1.4 1.3 1.2 1.1 1.0
≥55.0% steady state – one shower 0.9 0.9 0.8 0.7 0.7
≥55.0% steady state – two showers 1.8 1.7 1.5 1.5 1.3
DWHR – MURBs14 30.0 to <42.0% steady state – one shower 0.1 or max. 0.5 0.1 or max. 0.6 0.1 or max. 0.5 0.1 or max. 0.4 0.1 or max. 0.4
≥ 42.0 to <55.0% steady state – one shower 0.1 or max. 0.7 0.1 or max. 0.7 0.1 or max. 0.6 0.1 or max. 0.6 0.1 or max. 0.5
≥55.0% steady state – one shower 0.1 or max. 0.9 0.1 or max. 0.9 0.1 or max. 0.8 0.1 or max. 0.7 0.1 or max. 0.7
Electrical Savings 150 kWh/yr 0.2 0.2 0.1 0.1 0.1

NOTES:

  1. Thermal resistance requirements are listed in effective valus, unless otherwise indicated with (nominal) for nominal value. An ‘n/a’ indicates that an option is not possible, likely due to a higher core BOP requirement.
  2. Only one of the three sub-categories under Ceilings may be chosen.
  3. Where both attics below ceilings and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level.
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0° C.
  8. BOP points are calculated as follows: [(max. points) / (# MURB units in building)] * [# HRVs]
  9. Applies only to 50-270 L electric tanks. Heat trap required on both inlet and outlet for top inlet types, and outlet only for bottom inlet types.
  10. This option applies only to stand-alone water heaters and not those that form part of a combined space and water heating system.
  11. This option cannot be used in conjunction with domestic water heater options.
  12. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  13. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all showers in the house. The maximum allowable amount is two showers.
  14. BOP points are calculated as follows: 0.1 or [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater.

6.3 Manitoba

6.3.1 Climate Zones for Manitoba

The climate zones for 6.3.2, 6.3.3 and 6.3.4 are defined by Table 15.

Table 15
ESNH Climate Zones for Manitoba
Forming Part of 6.3.1
Region Zone Delineation Heating Degree Days1
ESNH MB Zone 1 South of 53rd Parallel ≤6499
ESNH MB Zone 2 On or north of 53rd Parallel ≥6500

NOTE:

  1. As determined by 1.2.2.1.

6.3.2 Electrical Savings Options for Manitoba

Table 16 shall be used to determine electrical savings from air conditioning for Manitoba for determining compliance to 4.8.

Table 16
Electrical Savings from Air Conditioning for Manitoba
Forming Part of 4.8 and 6.3.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH MB Zone 1 45 85
ESNH MB Zone 2 22 40

6.3.3 Performance Targets for Manitoba

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 17.

Table 17
Minimum EnerGuide Rating under the Performance Approach for Manitoba
Forming Part of 6.3.3
House Type HOT2000 version Minimum ERS Target
ESNH MB Zone 1 ESNH MB Zone 2
All 10.51 80 80

6.3.4 Builder Option Packages for Manitoba

Apply all BOP elements for the applicable climate zone, per Table 18.

Table 18

Manitoba Core BOP
Forming Part of 6.3.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

Table 19

Manitoba BOP Options
Forming Part of 6.3.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

6.4 New Brunswick

6.4.1 Climate Zones for New Brunswick

The climate zones for 6.4.2, 6.4.3 and 6.4.4 are defined by Table 20.

Table 20
ESNH Climate Zones for New Brunswick
Forming Part of 6.4.
Region Heating Degree Days1
ESNH NB Zone 1 <5000
ESNH NB Zone 2 ≥5000

NOTE:

  1. As determined by 1.2.2.1.

6.4.2 Electrical Savings Options for New Brunswick

Table 21 shall be used to determine electrical savings from air conditioning for New Brunswick for determining compliance to 4.8.

Table 21
Electrical Savings from Air Conditioning for New Brunswick
Forming Part of 4.8 and 6.4.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH NB Zone 1 37 70
ESNH NB Zone 2 22 42

6.4.3 Performance Targets for New Brunswick

For ENERGY STAR qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 22.

Table 22
Minimum EnerGuide Rating under the Performance Approach for New Brunswick
Forming Part of 6.4.3
House
Type		 HOT2000
version		 Minimum ERS Target
ESNH NB Zone 1 ESNH NB Zone 2
All 10.51 81 81

6.4.4 Builder Option Packages for New Brunswick

Apply all BOP elements for the applicable climate zone, per Table 23.

Table 231,2
New Brunswick Core BOP
Forming Part of 6.4.4
Item Zone 1
(4000-4999 DD)
RSI (R)		 Zone 2
(>5000 DD)
RSI (R)
Ceilings below attics 8.67 (49.2) 10.43 (59.2)
Cathedral ceilings and flat roofs 4.67 (26.5) 5.02 (28.5)
Walls above grade 3.08 (17.5) 3.08 (17.5)
Floors over unheated spaces 4.67 (26.5) 5.02 (28.5)
Foundation walls below or in contact with the ground 2.98 (16.9) 3.46 (19.6)
Unheated floors on ground above frost line 1.96 (11.1) 1.96 (11.1)
Heated floors on ground 2.32 (13.2) 2.85 (16.2)
Slab on grade with integral footing 1.96 (11.1) 3.72 (21.1)
Fenestration3 ENERGY STAR® Zone B or Zone 1
Space Heating
  • Electric resistance convection heater with line voltage thermostat4,
  • Electric furnace or boiler,
  • 85% AFUE ENERGY STAR® oil-fired furnace or boiler,
  • 75% thermal efficiency solid-fuel,,
  • Air-source heat pump (ASHP),
  • Ground-source heat pump (GSHP) ,
  • Dual system: Electric resistance with 75% thermal efficiency solid-fuel,
  • Dual system: Electric resistance with ASHP or GSHP, or
  • 90% AFUE furnace or boiler
Domestic Water Heating5 Electric:
  • 50L- 270L, bottom inlet, max. SL ≤ 66 W
  • 50L- 270L, top inlet, max. SL ≤61W
  • >270L-454L, bottom inlet, max. SL ≤ 89 W + heat trap (on outlet only) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)
  • >270L-454L, top inlet, max. SL ≤ 84 W + heat trap (on both inlet and outlet) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)

Fuel-fired: 0.67 EF
Ventilation6 60% SRE @ 0°C; 55% SRE @ -25°C
Electrical savings7 400 kWh/yr
Option points required8 2.6 3.0

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values. 
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it. 
  3. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Line voltage thermostat shall be certified to C828-13 “Performance requirements for thermostats used with individual room electric space heating devices”.
  5. Cannot be used in combined space and water heating configurations.
  6. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.  
  7. Select a minimum of 400 kWh/yr of measures from Table 4 or 21.
  8. Select options from Table 24 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.

 

Table 241
New Brunswick Core BOP
Forming Part of 6.4.4

Category

 Item
ESNH
NB
Zone 1		 ESNH
NB
Zone 2
Ceilings2 Ceilings Below Attic (100%) R 60 (nominal) 0.1 n/a
R 52 (nominal) at heel w/ R 60 (nominal) 0.2 n/a
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.1 n/a
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 Attic–R 60 (nominal); flat/cathedral–R 40 (nominal) 0.1 n/a
R 52 (nominal) at heel w/ R 60 (nominal) in attic; flat/cathedral–R 40 (nominal) 0.2 n/a
Walls Above Grade RSI 3.41 (R 19.4) 0.6 0.7
RSI 3.59 (R 20.4) 0.8 0.7
RSI 3.78 (R 21.5) 1.0 1.1
RSI 3.90 (R 22.1) 1.1 1.2
RSI 4.03 (R 22.9) 1.2 1.3
RSI 4.48 (R 25.4) 1.5 1.7
RSI 4.79 (R 27.2) 1.8 1.9
Foundation Walls RSI 3.67 (R 20.8) 0.3 0.1
RSI 3.94 (R 22.4) 0.5 0.3
RSI 4.19 (R 23.8) 0.6 0.4
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.1 0.3
RSI 1.76 (R 10.0) full slab 0.2 0.4
Fenestration5 ENERGY STAR® Zone C or Zone 2 0.2 0.2
ENERGY STAR® Zone D or Zone 2 0.4 0.4
Airtightness6 Level 1 0.4 0.4
Level 2 0.8 0.9
Level 3 1.1 1.3
Airtightness + HRV/ERV6,7 Level 4+ ≥84% SRE @ 0 °C 2.0 2.2
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C 2.0 2.2
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1 0.1
≥75 to <84% SRE @ 0 °C 0.4 0.4
≥84% SRE @ 0 °C 0.6 0.6
HRV/ERV – MURBs7,8 65 to <75% SRE @ 0 °C max. 0.1 max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.4 max. 0.4
≥84% SRE @ 0 °C max. 0.6 max. 0.6
Domestic Water Heating10 Heat trap and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)9 0.1 n/a
Instantaneous min. EF 0.82 0.6 0.5
Instantaneous condensing min. EF 0.90 0.8 0.8
Instantaneous condensing min. EF 0.95 0.8 0.8
Tank condensing min. TE 90% 0.7 0.7
Tank condensing min. TE 94% 0.8 0.8
SDHW ≥6000 MJ/yr11 1.1 1.1
DWHR12 30 to <42% steady state – one shower 0.5 0.5
30 to <42% steady state – two showers 0.9 0.9
≥42% steady state – one shower 0.6 0.6
≥42% steady state – two showers 1.2 1.2
DWHR – MURBs13 30.0 to <42.0% steady state – one shower 0.1 or max. 0.5 0.1 or max. 0.5
≥42.0% steady state – one shower 0.1 or max. 0.6 0.1 or max. 0.6
Electrical Savings Additional 150 kWh/yr 0.1 0.1

NOTES:

  1. Thermal resistance requirements are listed in effective values, unless otherwise indicated with (nominal) for nominal value. An ‘n/a’ indicates that an option is not possible, likely due to a higher core BOP requirement.
  2. Only one of the three sub-categories under Ceilings may be chosen.
  3. Where both ceilings below attics and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to:http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level. 
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. BOP points are calculated as follows: [(max. points) / (# MURB units in building)] * [# HRVs]
  9. Applies only to 50-270 L tanks. Heat trap required on both inlet and outlet for top inlet types, and outlet only for bottom inlet types.
  10. This option applies only to stand-alone water heaters and not those that form part of a combined space and water heating system.
  11. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  12. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all the showers in the house. The maximum allowable amount is two showers.
  13. BOP points are calculated as follows: 0.1 or [(max. points) / (#MURB units in building)] * [# DWHR units], whichever is greater.

6.5 Newfoundland and Labrador

6.5.1 Climate Zones for Newfoundland and Labrador

The climate zones for 6.5.2, 6.5.3 and 6.5.4 are defined by Table 25.

Table 25
ESNH Climate Zones for Newfoundland and Labrador
Forming Part of 6.5.1
Region Heating Degree Days1
ESNH NL Zone 1 <5000
ESNH NL Zone 2 5000-5999
ESNH NL Zone 3 ≥6000

NOTE:

  1. As determined by 1.2.2.1.

6.5.2 Electrical Savings Options for Newfoundland and Labrador

Table 26 shall be used to determine electrical savings from air conditioning for Newfoundland and Labrador for determining compliance to 4.8.

Table 26
Electrical Savings from Air Conditioning for Newfoundland and Labrador
Forming Part of 4.8 and 6.5.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH NL Zone 1 5 10
ESNH NL Zone 2 10 18
ESNH NL Zone 3 10 20

6.5.3 Performance Targets for Newfoundland and Labrador

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 27.

Table 27
Minimum EnerGuide Rating under the Performance Approach for Newfoundland and Labrador
Forming Part of 6.5.3
House
Type		 HOT2000
version		 Minimum ERS Target
ESNH NL Zone 1 ESNH NL Zone 2 ESNH NL Zone 3
All 10.51 80 81 81

6.5.4 Builder Option Packages for Newfoundland and Labrador

Apply all BOP elements for the applicable climate zone, per Table 28.

Table 281,2
Newfoundland and Labrador Core BOP
Forming Part of 6.5.4
Item ESNH NL Zone 1 ESNH NL Zone 2 ESNH NL Zone 3
RSI (R) RSI (R) RSI (R)
Ceilings below attics 8.67 (49.2) 10.43 (59.2) 10.43 (59.2)
Cathedral ceilings and flat roofs 4.67 (26.5) 5.02 (28.5) 5.02 (28.5)
Walls above grade 3.08 (17.5) 3.08 (17.5) 3.85 (21.9)
Floors over unheated spaces 4.67 (26.5) 5.02 (28.5) 5.02 (28.5)
Foundation walls below or in contact with the ground 2.98 (16.9) 3.46 (19.6) 3.46 (19.6)
Unheated floors on ground above frost line 1.96 (11.1) 1.96 (11.1) 1.96 (11.1)
Heated or unheated floors on ground on permafrost n/a n/a 4.44 (25.2)
Heated floors on ground 2.32 (13.2) 2.85 (16.2) 2.85 (16.2)
Slab on grade with integral footing 1.96 (11.1) 3.72 (21.1) 3.72 (21.1)
Fenestration3 ENERGY STAR
Zone B or Zone 1		 ENERGY STAR
Zone B or Zone 1		 ENERGY STAR Zone C or Zone 2
Space heating Electric resistance heater with line voltage thermostat4
Solid-fuel, 75% thermal efficiency
Air-source heat pump
Ground-source heat pump
Water heating5 Electric:
50L – 270L, bottom inlet, max. SL ≤ 66 W
50L – 270L, top inlet, max. SL ≤ 61
>270L-454L, bottom inlet, max. SL ≤ W 89 W + heat trap and pipe insulation (3 m with R4)
>270L-454L, top inlet, max. SL ≤ 84 W + heat trap and pipe insulation (3 m with R4)
Fuel-fired:
0.67 EF5
Ventilation6 60% SRE @ 0 °C;  55% SRE @ -25 °C
Electrical savings7 400 kWh/yr
Option points required8 2.6 2.8 2.9

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) calues.
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP option from the BOP Options table in order to get credit for it.
  3. Climate zones for ENERGY STAR fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Line voltage thermostat shall be certified to C828-13 “Performance requirements for thermostats used with individual room electric space heating devices”.
  5.  Cannot be used in combined space and water heating configurations.
  6. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  7. Select a minimum of 400 kWh/yr of measures from Table 4 or 26.
  8. Select options from Table 29 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 291
Newfoundland and Labrador BOP Options
Forming Part of 6.5.4
Category Item ESNH NL Zone 1 ESNH NL Zone 2 ESNH NL Zone 3
Ceilings2 Ceilings Below Attic (100%) R 60 (nominal) 0.1 n/a n/a
R 52 (nominal) at heel w/ R60 (nominal) 0.2 n/a n/a
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.1 n/a n/a
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 Attic-R 60 (nominal); flat/cathedral-R 40 (nominal) 0.2 n/a n/a
R 52 (nominal) at heel w/ R 60 (nominal) in attic; flat/cathedral-R 40 (nominal) 0.2 n/a n/a
Walls Above Grade   RSI 3.41 (R 19.4) 0.7 0.6 n/a
RSI 3.59 (R 20.4) 0.7 0.8 n/a
RSI 3.78 (R 21.5) 1.1 1.1 n/a
RSI 3.90 (R 22.1) 1.2 1.1 0.1
RSI 4.03 (R 22.9) 1.2 1.3 0.2
RSI 4.48 (R 25.4) 1.6 1.6 0.6
RSI 4.79 (R 27.2) 1.9 1.9 0.9
Foundation Walls RSI 3.67 (R 20.8) 0.3 0.1 0.1
RSI 3.94 (R 22.4) 0.6 0.3 0.3
RSI 4.19 (R 23.8) 0.6 0.3 0.4
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.2 0.3 0.3
RSI 1.76 (R 10.0) full slab 0.2 0.4 0.4
Fenestration5 ENERGY STAR® Zone C or Zone 2 0.2 0.2 n/a
ENERGY STAR® Zone D or Zone 3 0.4 0.4 0.4
Airtightness6 Level 2 0.5 0.5 0.5
Level 3 1.0 0.9 1.0
Level 4 1.4 1.4 1.6
Level 5 1.9 1.8 2.1
Airtightness +
HRV/ERV6,7		 Level 4+ ≥84% SRE @ 0 °C 2.2 2.2 2.5
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C max. 2.2 max. 2.2 max. 2.5
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1 0.1 0.1
≥75 to <84% SRE @ 0 °C 0.3 0.3 0.3
≥84% SRE @ 0 °C 0.4 0.5 0.5
HRV/ERV – MURBs7,8   65 to <75% SRE @ 0 °C max. 0.1 max. 0.1 max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.3 max. 0.3 max. 0.3
≥84% SRE @ 0 °C max. 0.4 max. 0.5 max. 0.5
Domestic
Water Heating9		 ENERGY STAR qualified heat pump water heater 0.9 0.9 0.8
Instantaneous min. EF 0.82 0.6 0.6 0.6
Instantaneous condensing min. EF 0.90 0.8 0.7 0.7
Instantaneous condensing min. EF 0.95 0.8 0.8 0.8
Tank condensing min. EF 0.80 0.8 0.8 0.8
Tank condensing min. TE 90% 0.8 0.8 0.8
Tank condensing min. TE 94% 0.8 0.8 0.8
SDHW Attached/Detached: ≥6000 MJ/yr 1.0 1.0 0.9
MURBs: ≥3000 MJ/yr/unit10 1.0 1.0 0.9
DWHR11 30.0 to <42.0% steady state – one shower 0.5 0.4 0.4
30.0 to <42.0% steady state – two showers 0.9 0.9 0.8
≥42.0 to <55.0 steady state – one shower 0.6 0.6 0.5
≥42.0 to <55.0% steady state – two showers 1.2 1.1 1.0
≥55.0% steady state – one shower 0.8 0.8 0.7
≥55.0% steady state – two showers 1.6 1.5 1.3
DWHR – MURBs12 30.0 to <42.0% steady state – one shower 0.1 or max. 0.5 0.1 or max. 0.4 0.1 or max. 0.4
≥42.0 to <55.0% steady state – one shower 0.1 or max. 0.6 0.1 or max. 0.6 0.1 or max. 0.5
≥55.0% steady state – one shower 0.1 or max. 0.8 0.1 or max. 0.8 0.1 or max. 0.7
Electrical Savings 150 kWh/yr 0.1 0.1 0.1

NOTES:

  1. Thermal resistance requirements are listed in effective values, unless otherwise indicated with (nominal) for nominal value. An ‘n/a’ indicates that an option is not possible, likely due to a higher core BOP requirement.
  2. Only one of the three sub-categories under Ceilings may be chosen.
  3. Where both attics below ceilings and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level.
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. BOP points are calculated as follows: [(max. points) / (#MURB units in building)] * [# HRVs]
  9. This option applies only to stand-alone water heaters and not those that form part of a combined space wand water heating system.
  10. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  11. This option is based on the numbers of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all the showers in the house. The maximum allowable amount is two showers.
  12. BOP points are calculated as follows: 0.1 or [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater.

6.6 Northwest Territories

6.6.1 Climate Zones for Northwest Territories

The climate zones for 6.6.2, 6.6.3 and 6.6.4 are defined by Table 30.

Table 30
ESNH Climate Zones for Northwest Territories
Forming Part of 6.6.1
Region Heating Degree Days1
ESNH NT Zone 1 ≥7000

NOTE:

  1. As determined by 1.2.2.1.

6.6.2 Electrical Savings Options for Northwest Territories

Table 31 shall be used to determine electrical savings from air conditioning for Northwest Territories for determining compliance to 4.8.

Table 31
Electrical Savings from Air Conditioning for Northwest Territories
Forming Part of 4.8 and 6.6.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH NT Zone 1 15 27

6.6.3 Performance Targets for Northwest Territories

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 32.

Table 32
Minimum EnerGuide Rating under the Performance Approach for Northwest Territories
Forming Part of 6.6.3
House Type HOT2000 version Minimum ERS Target
ESNH NT Zone 1
All 10.51 83

6.6.4 Builder Option Packages for Northwest Territories

Apply all BOP elements for the applicable climate zone, per Table 33.

Table 33

Northwest Territories Core BOP
Forming Part of 6.6.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

Table 34

Northwest Territories BOP Options
Forming Part of 6.6.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

6.7 Nova Scotia

6.7.1 Climate Zones for Nova Scotia

The climate zones for 6.7.2, 6.7.3 and 6.7.4 are defined by Table 35.

Table 35
ESNH Climate Zones for Nova Scotia
Forming Part of 6.7.1
Region Heating Degree Days 1
ESNH NS Zone 1 <5000

NOTE:

  1. As determined by 1.2.2.1.

Electrical Savings Options for Nova Scotia

Table 36 shall be used to determine electrical savings from air conditioning for Nova Scotia for determining compliance to 4.8.

Table 36
Electrical Savings from Air Conditioning for Nova Scotia
Forming Part of 4.8 and 6.7.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH NS Zone 1 20 37

6.7.3 Performance Targets for Nova Scotia

For ENERGY STAR qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 37.

Table 37
Minimum EnerGuide Rating under the Performance Approach for Nova Scotia
Forming Part of 6.7.3
House Type HOT2000 version Minimum ERS Target
ESNH NS Zone 1
All 10.51 83

6.7.4 Builder Option Packages for Nova Scotia

Apply all BOP elements for the applicable climate zone, per Table 38.

Table 381,2
Nova Scotia Core BOP
Forming Part of 6.7.4
Item Zone 1
(<5000 HDD)
RSI (R)
Ceilings below attics 8.67 (49.2)
Cathedral ceilings and flat roofs 4.67 (26.5)
Walls above grade 3.08 (17.5)
Floors over unheated spaces 4.67 (26.5)
Foundation walls below or in contact with the ground 2.98 (16.9)
Unheated floors on ground above frost line 1.96 (11.1)
Heated floors on ground 2.32 (13.2)
Slab on grade with integral footing 1.96 (11.1)
Fenestration3 ENERGY STAR® Zone B or Zone 1
Space Heating
  • Electric resistance convection heater with line voltage thermostat4,
  • Electric furnace or boiler,
  • 85% AFUE ENERGY STAR® qualified oil-fired furnace or boiler,
  • 75% thermal efficiency solid fuel,
  • 90% AFUE furnace or boiler,
  • Air-source heat pump, or
  • Ground-source heat pump
Domestic Water Heating5 Electric:
  • 50L- 270L, bottom inlet, max. SL ≤ 66 W
  • 50L- 270L, top inlet, max. SL ≤ 61W
  • >270L-454L, bottom inlet, max. SL ≤ 89 W + heat trap (on outlet only) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)
  • >270L-454L, top inlet, max. SL ≤ 84 W + heat trap (on both inlet and outlet) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)
Fuel-fired: 0.67 EF
Ventilation6 60% SRE @ 0°C; 55% SRE @ -25°C
Electrical savings7 400 kWh/yr
Option points required8 4.9

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values. 
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it. 
  3. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Line voltage thermostat shall be certified to C828-13 “Performance requirements for thermostats used with individual room electric space heating devices”.
  5. Cannot be used in combined space and water heating configurations.
  6. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.  
  7. Select a minimum of 400 kWh/yr of measures from Table 4 or 36.
  8. Select options from Table 39 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 391
New Brunswick BOP Options
Forming Part of 6.7.4

Category

 Item
ESNH
NB
Zone 1
Ceilings2 Ceilings Below Attic (100%) R 60 (nominal) 0.1
R 52 (nominal) at heel w/ R 60 (nominal) 0.2
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.1
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 Attic–R 60 (nominal); flat/cathedral–R 40 (nominal) 0.1
R 52 (nominal) at heel w/ R 60 (nominal) in attic; flat/cathedral–R 40 (nominal) 0.2
Walls Above Grade RSI 3.41 (R 19.4) 0.6
RSI 3.59 (R 20.4) 0.7
RSI 3.78 (R 21.5) 1.0
RSI 3.90 (R 22.1) 1.1
RSI 4.03 (R 22.9) 1.2
RSI 4.48 (R 25.4) 1.5
RSI 4.79 (R 27.2) 1.8
Foundation Walls RSI 3.67 (R 20.8) 0.3
RSI 3.94 (R 22.4) 0.5
RSI 4.19 (R 23.8) 0.6
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.1
RSI 1.76 (R 10.0) full slab 0.2
Fenestration5 ENERGY STAR® Zone C or Zone 2 0.1
ENERGY STAR® Zone D or Zone 3 0.3
Airtightness6
Level 2 0.4
Level 3 0.8
Level 4 1.1
Airtightness + HRV/ERV6,7 Level 4+ ≥84% SRE @ 0 °C 2.0
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C max. 2.0
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1
≥75 to <84% SRE @ 0 °C 0.4
≥84% SRE @ 0 °C 0.6
HRV/ERV – MURBs7,8 65 to <75% SRE @ 0 °C max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.4
≥84% SRE @ 0 °C max. 0.6
Domestic Water Heating Heat trap and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)9 0.1
SDHW ≥6000 MJ/yr10 1.0
DWHR11 30 to <42% steady state – one shower 0.5
30 to <42% steady state – two showers 1.0
≥42% steady state – one shower 0.7
≥42% steady state – two showers 1.3
DWHR – MURBs12 30.0 to <42.0% steady state – one shower 0.1 or max. 0.5
≥42.0% steady state – one shower 0.1 or max. 0.7
Electrical Savings Additional 150 kWh/yr 0.1

NOTES:

  1.  Thermal resistance requirements are listed in effective values, unless otherwise indicated with (nominal) for nominal value.
  2. Only one of the three sub-categories under Ceilings may be chosen.
  3. Where both attics below ceilings and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to:http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level. 
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. BOP points are calculated are calculated as follows: [(max. points) / (# MURB units in bulding)] * [# HRVs]
  9. Applies only to 50-270 L tanks. Heat trap required on both inlet and outlet for top inlet types, and outlet only for bottom inlet types.
  10. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  11. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all the showers in the house. The maximum allowable amount is two showers.
  12. BOP points are calculated as follows: 0.1 or [(max.points) / (# MURB units in building)] * [DWHR units], whichever is greater.

6.8 Nunavut

6.8.1 Climate Zones for Nunavut

The climate zones for 6.8.2, 6.8.3 and 6.8.4 are defined by Table 40.

Table 40
ESNH Climate Zones for Nunavut
Forming Part of 6.8.1
Region Heating Degree Days 1
ESNH NU Zone 1 ≥7000

NOTE:

  1. As determined by 1.2.2.1.

6.8.2 Electrical Savings Options for Nunavut

Table 41 shall be used to determine electrical savings from air conditioning for Nunavut for determining compliance to 4.8.

Table 41
Electrical Savings from Air Conditioning for Nunavut
Forming Part of 4.8 and 6.8.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH NU Zone 1 n/a n/a

6.8.3 Performance Targets for Nunavut

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 42.

Table 42
Minimum EnerGuide Rating under the Performance Approach for Nunavut
Forming Part of 6.8.3
House Type HOT2000 version Minimum ERS Target
ESNH NU Zone 1
All 10.51 80

6.8.4 Builder Option Packages for Nunavut

Apply all BOP elements for the applicable climate zone, per Table 43.

Table 43

Nunavut Core BOP
Forming Part of 6.8.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

Table 44

Nunavut BOP Options
Forming Part of 6.8.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

6.9 Ontario

6.9.1 Climate Zones for Ontario

The climate zones for 6.9.2, 6.9.3 and 6.9.4 are defined by Table 45. 

Table 45
ESNH Climate Zones for Ontario
Forming Part of 6.9.1
Climate Zone Heating Degree Days1
ESNH ON Zone 1 <5000
ESNH ON Zone 2 ≥5000

NOTE:

  1. As determined by 1.2.2.1.

6.9.2 Electrical Savings From Air Conditioning for Ontario

Table 46 shall be used to determine electrical savings from air conditioning for Ontario for determining compliance to 4.8. 

Table 46
Electrical Savings from Air Conditioning for Ontario
Forming Part of 4.8 and 6.9.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH ON Zone 1 65 125
ESNH ON Zone 2 30 55

6.9.3 Performance Targets for Ontario

For ENERGY STAR® qualified homes following the performance approach, the energy targets and approved compliance software shall comply with Table 47.

Table 47
Minimum EnerGuide Rating under the Performance Approach for Ontario
Forming Part of 6.9.3
House Type HOT2000 version Minimum ERS Target
ESNH ON Zone 1 ESNH ON Zone 2
Attached, Detached 9.34c 83 83
MURBs 10.51 81 81

6.9.4 Builder Option Packages for Ontario

Apply all BOP elements for the applicable climate zone, per Table 48.

Table 481,2
Ontario Core BOP
Forming Part of 6.9.4
Item ESNH ON Zone 1 ESNH ON Zone 2
RSI R RSI R
Ceilings below attics 8.67 49.2 10.43 59.2
Cathedral ceilings and flat roofs 4.87 27.7 5.02 28.5
Walls above grade 3.08 17.5 3.08 17.5
Floors over unheated spaces 4.873 27.73 5.02 28.5
Foundation walls below or in contact with the ground 2.98 16.9 3.46 19.6
Unheated floors on ground above frost line 1.96 11.1 1.96 11.1
Heated or unheated floors on ground on permafrost n/a n/a 4.443 25.23
Heated floors on ground 2.32 13.2 2.85 16.2
Slabs on grade with integral footing 1.96 11.1 3.72 21.1
Fenestration4 ENERGY STAR Zone B or Zone 1
Space heating 95% AFUE ENERGY STAR furnace5 or boiler
Air-source heat pump
Ground-source heat pump
Domestic water heating EF 0.676,7
Combined space and water heating TPF 0.89
Combined space and water heating – attached houses and MURBs8 TPF 0.79
Ventilation9 60% SRE @0 °C and 55% SRE @ -25 °C
Electrical savings10 400 kWh/yr
Minimum BOP options (per Table 49)11 2.4 2.5

 NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values. 
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it.
  3. Applies to ≥6000 HDD only, per Table 2.
  4. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  5. Furnaces shall be either ENERGY STAR® qualified or have a 95% AFUE and a furnace fan efficiency ≤ 2.0%
  6. Cannot be used for meeting combined space and water heating configurations.
  7. An electric water heater may be used in lieu of the EF 0.67 water heater only when used in conjunction with the air source heat pump or ground source heat pump options.
  8. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  9. Excluding semi-detached houses.
  10. Select a minimum of 400 kWh/yr of measures from Table 4 or Table 46.
  11. Select options from Table 49 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 491
Ontario BOP Options
Forming Part of 6.9.4
Category Item ESNH ON Zone 1 ESNH ON Zone 2
Ceilings2 Ceilings Below Attic (100%) R 42 (nominal) at heel 0.1 n/a
R 60 (nominal) 0.1 n/a
R 52 (nominal) at heel w/ R 60 (nominal) 0.2 n/a
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.1 n/a
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 R 42 (nominal) at heel 0.1 n/a
Attic–R 60 (nominal); flat/cathedral–R 40 (nominal) 0.1 n/a
R 52 (nominal) at heel w/ R 60 (nominal) in attic; flat/cathedral–R 40 (nominal) 0.2 n/a
Walls Above Grade RSI 3.41 (R 19.4) 0.7 0.7
RSI 3.59 (R 20.4) 0.8 0.8
RSI 3.78 (R 21.5) 1.0 1.1
RSI 3.90 (R 22.1) 1.1 1.2
RSI 4.03 (R 22.9) 1.2 1.3
RSI 4.48 (R 25.4) 1.5 1.6
RSI 4.79 (R 27.2) 1.7 1.9
Foundation Walls RSI 3.67 (R 20.8) 0.2 n/a
RSI 3.94 (R 22.4) 0.4 n/a
RSI 4.19 (R 23.8) 0.4 0.1
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.1 0.1
RSI 1.76 (R 10.0) full slab 0.3 0.2
Fenestration5 ENERGY STAR® Zone C or Zone 2 0.1 0.1
ENERGY STAR® Zone D or Zone 3 0.4 0.3
Airtightness6 Level 2 0.3 0.4
Level 3 0.7 0.8
Level 4 1.0 1.2
Airtightness +
HRV/ERV6,7		 Level 4+ ≥84% SRE @ 0 °C 1.7 1.9
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C max. 1.7 max. 1.9
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1 0.1
≥75 to <84% SRE @ 0 °C 0.3 0.2
≥84% SRE @ 0 °C 0.5 0.4
HRV/ERV – MURBs7,8 65 to <75% SRE @ 0 °C max. 0.1 max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.3 max. 0.2
≥84% SRE @ 0 °C max. 0.5 max. 0.4
Domestic Water Heating9 Instantaneous min. EF 0.82 0.6 0.6
Instantaneous condensing min. EF 0.90 0.8 0.7
Instantaneous condensing min. EF 0.95 0.9 0.8
Tank condensing. EF 0.80 0.7 0.7
Tank condensing min. TE 90% 0.7 0.7
Tank condensing min. TE 94% 0.8 0.8
Combined Space and Water Heating10 TPF 0.90 0.2 n/a
TPF 0.91 0.4 n/a
TPF 0.92 0.5 n/a
TPF 0.93 0.6 n/a
TPF 0.94 0.7 n/a
TPF 0.95 0.9 0.8
Combined Space and Water Heating – Attached houses and MURBs10,11 TPF 0.79 0.4 n/a
TPF 0.80 0.6 n/a
TPF 0.82 0.8 n/a
TPF 0.84 0.9 n/a
TPF 0.86 1.1 n/a
TPF 0.88 1.3 n/a
TPF 0.90 1.6 n/a
TPF 0.92 1.8 n/a
SDHW ≥6000 MJ/yr 1.0 0.9
MURBs: ≥3000 MJ/yr/unit12 1.0 0.9
DWHR13 30 to <42% steady state – one shower 0.5 0.4
30 to <42% steady state – two showers 1.0 0.8
≥42% steady state – one shower 0.7 0.5
≥42% steady state – two showers 1.3 1.0
DWHR – MURBs14 30.0 to <42.0% stead state – one shower 0.1 or max. 0.5 0.1 or max. 0.4
≥42.0% steady state – one shower 0.1 or max. 0.7 0.1 or max. 0.5
Electrical Savings Additional 150 kWh/yr 0.1 0.1

NOTES:

  1. Thermal resistance requirements are listed in effective values, unless otherwise indicated with (nominal) for nominal value. An ‘n/a’ indicates that an upgrade is not possible, likely due to a higher core BOP requirement. 
  2. Only one of the three sub-categories under Ceilings may be chosen.
  3. Where both ceilings below attics and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to:http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level.
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. BOP points are calculated as follows: [(max. points) / (# MURB units in building)] * [#HRVs] 
  9. This option applies only to stand-alone water heaters and not those that form part of a combined space and water heating system.
  10. This option cannot be used in conjunction with domestic water heater options.
  11. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  12. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all the showers in the house. The maximum allowable amount is two showers.
  13. BOP points are calculated as follows: 0.1 or [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater.
  14. BOP points are calculated as follows: [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater.

6.10 Prince Edward Island

6.10.1 Climate Zones for Prince Edward Island

The climate zones for 6.10.2, 6.10.3 and 6.10.4 are defined by Table 50.

Table 50
ESNH Climate Zones for Prince Edward Island
Forming Part of 6.10.1
Region Heating Degree Days 1
ESNH PE Zone 1 <5000

NOTE:

  1. As determined by 1.2.2.1

6.10.2 Electrical Savings Options for Prince Edward Island

Table 51 shall be used to determine electrical savings from air conditioning for Prince Edward Island for determining compliance to 4.8.

Table 51
Electrical Savings from Air Conditioning for Prince Edward Island
Forming Part of 4.8 and 6.10.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH PE Zone 1 37 70

6.10.3 Performance Targets for Prince Edward Island

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 52.

Table 52
Minimum EnerGuide Rating under the Performance Approach for Prince Edward Island
Forming Part of 6.10.3
House Type HOT2000 version Minimum ERS Target
ESNH PE Zone 1
All 10.51 81

6.10.4 Builder Option Packages for Prince Edward Island

Apply all BOP elements for the applicable climate zone, per Table 53.

Table 531,2
 Prince Edward Island BOP Options
Forming Part of 6.10.4
Item Zone 1
(4000-4999 DD)
RSI (R)
Ceilings below attics 8.67 (49.2)
Cathedral ceilings and flat roofs 4.67 (26.5)
Walls above grade 3.08 (17.5)
Floors over unheated spaces 4.67 (26.5)
Foundation walls below or in contact with the ground 2.98 (16.9)
Unheated floors on ground above frost line 1.96 (11.1)
Heated floors on ground 2.32 (13.2)
Slab on grade with integral footing 1.96 (11.1)
Fenestration3 ENERGY STAR® Zone B or Zone 1
Space Heating
  • Electric resistance convection heater with line voltage thermostat4,
  • Electric furnace or boiler,
  • 85% AFUE ENERGY STAR® oil-fired furnace or boiler,
  • 75% thermal efficiency solid-fuel,,
  • Air-source heat pump (ASHP),
  • Ground-source heat pump (GSHP),
  • Dual system: Electric resistance with 75% thermal efficiency solid-fuel,
  • Dual system: Electric resistance with ASHP or GSHP, or
  • 90% AFUE furnace or boiler
Domestic Water Heating5 Electric:
  • 50L- 270L, bottom inlet, max. SL ≤ 66 W
  • 50L- 270L, top inlet, max. SL ≤ 61W
  • >270L-454L, bottom inlet, max. SL ≤ 89 W + heat trap (on outlet only) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)
  • >270L-454L, top inlet, max. SL ≤ 84 W + heat trap (on both inlet and outlet) and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)

Fuel-fired: 0.67 EF
Ventilation6 60% SRE @ 0°C; 55% SRE @ -25°C
Electrical savings7 400 kWh/yr
Option points required8 2.6

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values. 
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it. 
  3. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Line voltage thermostat shall be certified to C828-13 “Performance requirements for thermostats used with individual room electric space heating devices”.
  5. Cannot be used in combined space and water heating configurations.
  6. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.  
  7. Select a minimum of 400 kWh/yr of measures from Table 4 or 51.
  8. Select options from Table 54 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 541
Prince Edward Island BOP Options
Forming Part of 6.10.4
Category Item ESNH PEI Zone 1
Ceilings2 Ceilings Below Attic (100%) R 60 (nominal) 0.1
R 52 (nominal) at heel w/ R 60 (nominal) 0.2
Cathedral Ceilings and Flat Roofs (100%) R 40 (nominal) 0.1
Ceilings Below Attic and Cathedral Ceilings/Flat Roofs3 Attic–R 60 (nominal); flat/cathedral–R 40 (nominal) 0.1
R 52 (nominal) at heel w/ R 60 (nominal) in attic; flat/cathedral–R 40 (nominal) 0.2
Walls Above Grade   RSI 3.41 (R 19.4) 0.6
RSI 3.59 (R 20.4) 0.8
RSI 3.78 (R 21.5) 1.0
RSI 3.90 (R 22.1) 1.1
RSI 4.03 (R 22.9) 1.2
RSI 4.48 (R 25.4) 1.5
RSI 4.79 (R 27.2) 1.8
Foundation Walls RSI 3.67 (R 20.8) 0.3
RSI 3.94 (R 22.4) 0.5
RSI 4.19 (R 23.8) 0.6
Unheated Floors Below Frost Line4 RSI 0.88 (R 5.0) full slab 0.1
RSI 1.76 (R 10.0) full slab 0.2
Fenestration5 ENERGY STAR® Zone C or Zone 2 0.2
ENERGY STAR® Zone D or Zone 3 0.4
Airtightness6 Level 2 0.4
Level 3 0.8
Level 4 1.1
Airtightness +
HRV/ERV6,7 		Level 4+ ≥84% SRE @ 0 °C 2.0
Airtightness + HRV/ERV – MURBs6,7,8 Level 4+ ≥84% SRE @ 0 °C max. 2.0
HRV/ERV7 65 to <75% SRE @ 0 °C 0.1
≥75 to <84% SRE @ 0 °C 0.4
≥84% SRE @ 0 °C 0.6
HRV/ERV7,8 65 to <75% SRE @ 0 °C max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.4
≥84% SRE @ 0 °C max. 0.6
Domestic Water Heating10 Heat trap and pipe insulation (3 m with RSI 0.70 (R 4) or 1.2 m with RSI 1.41 (R 8)9 0.1
Instantaneous min. EF 0.82 0.6
Instantaneous condensing min. EF 0.90 0.8
Instantaneous condensing min. EF 0.95 0.8
Tank condensing min. TE 90% 0.7
Tank condensing min. TE 94% 0.8
SDHW ≥6000 MJ/yr 1.1
MURBs: ≥3000 MJ/yr/unit11 1.1
DWHR12 30 to <42% steady state – one shower 0.5
30 to <42% steady state – two showers 0.9
≥42% steady state – one shower 0.6
≥42% steady state – two showers 1.2
DWHR – MURBs13 30.0 to <42.0% steady state – one shower 0.1 or max. 0.5
≥42.0% steady state – one shower 0.1 or max. 0.6
Electrical Savings Additional 150 kWh/yr 0.1

NOTES:

  1. Thermal resistance requirements are listed in effective values, unless otherwise indicated with (nominal) for nominal value.
  2. Only one of the three sub-categories under Ceilings may be chosen. Where both attics below ceilings and cathedral or flat roofs are present, both options must be applied.
  3. Where both ceilings below attics and cathedral or flat roofs are present, both options must be applied.
  4. Full slab thermal resistance values do not apply to slab on grade foundations.
  5. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to:http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.
  6. See Appendix A for ACH, NLA and NLR values for each level. 
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.  
  8. BOP points are calculated as follows: [(max. points) / (# MURB units in building)] * [# HRVs]
  9. Applies only to 50-270 L tanks. Heat trap required on both inlet and outlet for top inlet types, and outlet only for bottom inlet types.
  10. This option applies only to stand-alone water heaters and not those that form part of a combined space and water heating system.
  11. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  12. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all the showers in the house. The maximum allowable amount is two showers.
  13. BOP points are calculated as follows: 0.1 or [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater.

6.11 Saskatchewan

6.11.1 Climate Zones for Saskatchewan

The climate zones for 6.11.2, 6.11.3 and 6.11.4 are defined by Table 55.

Table 55
ESNH Climate Zones for Saskatchewan
Forming Part of 6.11.1
Region Heating Degree Days 1
ESNH SK Zone 1 <6000
ESNH SK Zone 2 ≥6000

NOTE:

  1. As determined by 1.2.2.1.

6.11.2 Electrical Savings Options for Saskatchewan

Table 56 shall be used to determine electrical savings from air conditioning for Saskatchewan for determining compliance to 4.8.

Table 56
Electrical Savings from Air Conditioning for Saskatchewan
Forming Part of 4.8 and 6.11.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH SK Zone 1 30 55
ESNH SK Zone 2 20 40

6.11.3 Performance Targets for Saskatchewan

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 57.

Table 57
Minimum EnerGuide Rating under the Performance Approach for Saskatchewan
Forming Part of 6.11.3
House Type HOT2000 version Minimum ERS Target
ESNH SK Zone 1 ESNH SK Zone 2
All 10.51 81 82

6.11.4 Builder Option Packages for Saskatchewan

Apply all core BOP elements for the applicable climate zone, per Table 58.

Table 581, 2
Saskatchewan Core BOP
Forming Part of 6.11.4
Item ESNH SK Zone 1 ESNH SK Zone 2
RSI R RSI R
Ceilings below attics 10.43 59.2 10.43 59.2
Cathedral ceilings and flat roofs 5.02 28.5 5.02 28.5
Walls above grade 3.08 17.5 3.85 21.9
Floors over unheated spaces 5.02 28.5 5.02 28.5
Foundation walls below or in contact with the ground 3.46 19.6 3.46 19.6
Unheated floors on ground above frost line 1.96 11.1 1.96 11.1
Heated or unheated floors on ground on permafrost n/a n/a 4.44 25.2
Heated floors on ground 2.85 16.2 2.85 16.2
Slabs on grade with integral footing 3.72 21.1 3.72 21.1
Fenestration3 ENERGY STAR
Zone B or Zone 1		 ENERGY STAR
Zone C or Zone 2
Space heating 95% AFUE ENERGY STAR furnace4 or boiler
Air-source heat pump
Ground-source heat pump
Domestic water heating EF 0.675,6
Combined space and water heating TPF 0.90
Ventilation7 60% SRE @0 °C and 55% SRE @ -25 °C
Electrical savings8 400 kWh/yr
Minimum BOP options (per Table 59)9 2.2 2.1

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values. 
  2. Some thermal resistance requirements will need to be increased in order to comply with Table 2; in these cases, the builder may choose the appropriate option from the BOP Options table in order to get credit for it. 
  3. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR,” refer to: http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720. Zone 1 or 2 fenestration, whichever is applicable, is allowed for houses enrolled before 1 April 2016; after this date the requirements will increase by one climate zone (e.g. Zone 2 will be required in lieu of Zone B).
  4. Furnaces shall be either ENERGY STAR® qualified or have a 95% AFUE and a furnace fan efficiency ≤ 2.0%
  5. Cannot be used for meeting combined space and water heating configurations.
  6. An electric water heater may be used in lieu of the EF 0.67 water heater only when used in conjunction with the air source heat pump or ground source heat pump options.
  7. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  8. Select a minimum of 400 kWh/yr of measures from Table 4 or 56.
  9. Select options from Table 14 such that the points assigned total not less than the amount of points indicated in this table for the applicable climate zone.
Table 591
Saskatchewan BOP Options
Forming Part of 6.11.4
Category Item ESNH SK Zone 1 ESNH SK Zone 2
Ceilings Below Attic R52 (nominal) at heel n/a 0.1
Walls Above Grade RSI 3.41 (R 19.4) 0.7 n/a
RSI 3.59 (R 20.4) 0.8 n/a
RSI 3.78 (R 21.5) 1.1 n/a
RSI 3.90 (R 22.1) 1.2 n/a
RSI 4.03 (R 22.9) 1.3 n/a
RSI 4.48 (R 25.4) 1.6 0.5
RSI 4.79 (R 27.2) 1.9 0.7
Foundation Walls RSI 4.19 (R 23.8) 0.1 0.1
Unheated Floors Below Frost Line2 RSI 0.88 (R 5.0) full slab 0.1 0.1
RSI 1.76 (R 10.0) full slab 0.2 0.2
Fenestration3 ENERGY STAR® Zone C or Zone 2 0.1 n/a
ENERGY STAR® Zone D or Zone 3 0.3 0.3
Airtightness4 Level 2 0.4 0.5
Level 3 0.9 0.9
Level 4 1.4 1.3
Airtightness+ HRV/ERV4,5 Level 4 + ≥84% SRE @ 0 °C 2.0 2.1
Airtightness + HRV/ERV – MURBs4,5,6 Level 4 + ≥84% SRE @ 0 °C max. 2.0 max. 2.1
HRV/ERV5 65 to <75% SRE @ 0 °C 0.1 0.1
≥75 to <84% SRE @ 0 °C 0.2 0.3
≥84% SRE @ 0°C 0.3 0.4
HRV/ERV – MURBs5,6 65 to <75% SRE @ 0 °C max. 0.1 max. 0.1
≥75 to <84% SRE @ 0 °C max. 0.2 max. 0.3
≥84% SRE @ 0°C max. 0.3 max. 0.4
Domestic Water Heating7 Instantaneous min. EF 0.82 0.6 0.6
Instantaneous condensing min. EF 0.90 0.8 0.8
Instantaneous condensing min. EF 0.95 0.9 0.8
Tank condensing min. EF 0.80 0.8 0.7
Tank condensing min. TE 90% 0.7 0.7
Tank condensing min. TE 94% 0.8 0.8
Combined Space and Water Heating8 TPF 0.95 0.8 0.8
SDHW ≥6000 MJ/yr< 0.9 0.8
MURBs: ≥3000MJ/yr/unit9 0.9 0.9
DWHR10 30 to <42% steady state – one shower 0.4 0.4
30 to <42% steady state – two showers 0.8 0.7
≥42% steady state – one shower 0.5 0.5
≥42% steady state – two showers 1.0 1.0
DWHR – MURBs11 30.0 to <42.0% steady state – one shower 0.1 or max. 0.4 0.1 or max. 0.4
≥42.0% steady state – one shower 0.1 or max. 0.5 0.1 or max. 0.5
Electrical Savings Additional 150 kWh/yr 0.1 0.1

NOTES:

  1. Thermal resistance requirements are listed in effective RSI (R) values, unless otherwise indicated with (nominal) for nominal value. An ‘n/a’ indicates that an option is not possible, likely due to a higher core BP requirement. 
  2. Full slab thermal resistance values do not apply to slab on grade foundations.
  3. Climate zones for ENERGY STAR® fenestration products are defined in “Climate Zones – ENERGY STAR®,” refer to:http://www.nrcan.gc.ca/energy/products/for-participants/specifications/13720.  
  4. See appendix A for ACH, NLA and NLR values for each level.
  5. Refer to 4.7.1.2(b) for how to determine the SRE @ 0 °C.
  6. BOP points are calculated as follows [(max. points) / (# MURB units in building)] * [# HRVs]
  7. This option applies only to stand-alone water heaters and not those that form part of a combined space and water heating system.
  8. These options cannot be used in conjunction with domestic water heater options.
  9. The minimum of 3000 MJ/yr/unit must be met for all units in the building.
  10. This option is based on the number of shower stacks from which heat is being recovered, not the number of DWHR units, with one exception: houses with a total of one shower may claim the points for two showers since the DWHR unit is recovering heat from all the showers in the house. The maximum allowable amount is two showers.
  11. BOP points are calculated as follows: 0.1 or [(max. points) / (# MURB units in building)] * [# DWHR units], whichever is greater. 

6.12 Yukon

6.12.1 Climate Zones for Yukon

The climate zones for 6.12.2, 6.12.3 and 6.12.4 are defined by Table 60.

Table 60
ESNH Climate Zones for Yukon
Forming Part of 6.12.1
Region Heating Degree Days 1
ESNH YK Zone 1 ≥7000

NOTE:

  1. As determined by 1.2.2.1.

6.12.2 Electrical Savings Options for Yukon

Table 61 shall be used to determine electrical savings from air conditioning for Yukon for determining compliance to 4.8.

Table 61
Electrical Savings from Air Conditioning for Yukon
Forming Part of 4.8 and 6.12.2
Climate Zone ENERGY STAR® Qualified Air Conditioner
(kWh/yr)
SEER 14.5 SEER 16
ESNH YK Zone 1 9 18

6.12.3 Performance Targets for Yukon

For ENERGY STAR® qualified homes following the Performance Approach, the energy targets and approved compliance software shall comply with Table 62.

Table 62
Minimum EnerGuide Rating under the Performance Approach for Yukon
Forming Part of 6.12.3
House Type HOT2000 version Minimum ERS Target
ESNH YK Zone 1
All 10.51 85

6.12.4 Builder Option Packages for Yukon

Apply all BOP elements for the applicable climate zone, per Table 63.

Table 63

Yukon Core BOP
Forming Part of 6.12.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

Table 64

Yukon BOP Options
Forming Part of 6.12.4

This section is currently under development while we are regionally customizing the ENERGY STAR® program. The information will be produced shortly.

APPENDIX A: AIRTIGHTNESS METRICS

Table A-1

Airtightness Metrics for Attached Buildings
Level ACH NLA NLR
cm2/m2 in2/100 ft2 L/s/m2 cfm50/ft2
11 3.0 2.12 3.06 1.32 0.26
2 2.5 1.66 2.39 1.02 0.20
3 2.0 1.18 1.70 0.78 0.15
4 1.5 0.72 1.04 0.54 0.11
5 0.6 0.45 0.65 0.26 0.05

NOTE:

  1. Level 1 represents the core BOP requirement.

Table A-2

Airtightness Metrics for Detached Buildings
Level ACH NLA NLR
cm2/m2 in2/100 ft2 L/s/m2 cfm50/ft2
11 2.5 1.26 1.81 0.93 0.18
2 2.0 1.00 1.44 0.75 0.15
3 1.5 0.75 1.08 0.57 0.11
4 1.0 0.49 0.71 0.38 0.07
5 0.6 0.30 0.43 0.24 0.05

NOTE:

  1. Level 1 represents the core BOP requirement.

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