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Gas-fired instantaneous water heaters

Energy Efficiency Regulations

Regulatory definition

Household gas-fired instantaneous water heater means a flow-activated water heater that uses natural gas or propane for fuel, that 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).

Compliance date

Manufactured on or after January 1, 2020

Testing standard

CAN/CSA-P.3-15

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
household gas-fired instantaneous water heaters
Energy-using product Energy efficiency standard Manufacturing period
Household gas-fired instantaneous water heaters that have a maximum flow rate of < 6.4 L/min Uniform energy factor ≥ 0.86 On or after
January 1, 2020
Household gas-fired instantaneous water heaters that have a maximum flow rate of ≥ 6.4 L/min Uniform energy factor ≥ 0.87 On or after
January 1, 2020

UEF = Uniform Energy Factor

Energy efficiency report requirements

  • name of product
  • brand name
  • model number
  • manufacturer
  • the 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
  • uniform energy factor
  • Vr
  • the type of fuel used
  • input rate, in kW (Btu/h)
  • maximum flow rate

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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