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Gas-fired instantaneous water heaters - commercial

Energy Efficiency Regulations

Regulatory definition

Commercial gas-fired instantaneous water heater  means a flow-activated water heater that uses natural gas or propane for fuel, has an input rate greater than 58.56 kW (200,000 Btu/h), has a Vr greater than 7.6 L (2 US gallons) and is designed to provide hot water at a temperature greater than 82°C (180°F).

For the purpose of these Regulations, a gas-fired instantaneous water heater is one of the following types:

  • (a) household, if it has an input rate of less than 58.56 kW (200,000 Btu/h), has a Vr of no greater than 7.6 L (2 US gallons) and is designed to provide hot water at a temperature no greater than 82°C (180°F); or
  • (b) commercial, if it is not described in paragraph (a).

Compliance date

Manufactured on or after July 1, 2023.

Testing standard

10 C.F.R Appendix C

Energy efficiency regulations by province

Some provinces also have their own energy efficiency regulations for many of the federally regulated products – find out which ones!

Energy efficiency standard

Energy performance standard for
commercial gas-fired instantaneous water heaters

Energy-using product

Energy efficiency standard

Manufacturing period

Commercial gas-fired instantaneous water heaters

Thermal Efficiency factor ≥ 94%

On or after
July 1, 2023

L = Litres
Vr = the rated nominal volume, typically used in marketing material

Energy efficiency report requirements

  • name of product
  • brand name
  • model number
  • manufacturer
  • name of the certification body or province whose verification mark will be on the product or its package
  • whether a mathematical model as defined in the Regulations was used to generate any of the information provided below
  • fuel type
  • Vr, in litres
  • input rate, in kW (Btu/h)
  • maximum flow rate (litres/minute)
  • thermal efficiency

Download the energy efficiency reporting template.

This document does not constitute part of the Energy Efficiency Act (Act) or its associated regulations.  This document is an administrative document that is intended to facilitate compliance by the regulated party with the Act and its associated regulations.  This document is not intended to provide legal advice regarding the interpretation of the Act or its associated regulations. If a regulated party has questions about their legal obligations or responsibilities under the Act or its associated regulations, they should seek the advice of legal counsel.

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