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Internal water-loop heat pumps

Energy Efficiency Regulations

Regulatory definition

Internal water loop heat pump, a water-source single package or split-system heat pump that is factory-built, is intended for installation in an internal water loop systems and has a cooling or heating capacity of not more than 40 kilowatts (135 000 Btu/h)

Compliance date

Manufactured on or after February 3, 1995

For models manufactured prior, refer to the Regulations

Testing standard


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 internal water loop heat pumps
Product type Mininum COP
Cooling COPc Heating COPh
November 2006
Cooling capacity
< 5 kW
≥ 3.28°C with 30°C inlet water ≥ 4.2°C with 20°C inlet water
Cooling capacity
≥ 5 kW and ≤ 40 kW
≥ 3.52°C with 30°C inlet water ≥ 4.2°C with 20°C inlet water


COP = Coefficient of performance – a ratio for both the cooling COPc and heating COPh modes calculated by dividing the capacity expressed in watts by the power input in watts, excluding any supplementary heat
kW = kilowatts

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
  • voltage
  • cooling capacity; in kW (Btu/h)
  • heating capacity; in kW (Btu/h)
  • Air-Conditioning and Refrigeration Institute (ARI) classification
  • cooling coefficient of performance with 30°C inlet water
  • heating coefficient of performance with 20°C inlet water

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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