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Electric water heaters - household

Energy Efficiency Regulations

Regulatory definition

Household electric water heater, a stationary electric storage tank water heater that is intended for use on a pressurized water system and that has an input rate of less than 12 kW (40,982 Bth/h) and has a Vr of at least 50L (13.21 US gallons).

Compliance date

Manufactured on or after February 3, 1995

For models manufactured prior, refer to the Regulations

Compliant product models

Electric water heaters - household - household as listed on NRCan’s searchable database

Testing standard

CAN/CSA-C191-04

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 electric water heaters
Product type Standby loss, in W
Bottom inlet *
Vr of ≥ 50 L but ≤ 270 L ≤ 40 + 0.2 Vr
Vr of > 270 L but ≤ 454 L ≤ 0.472 Vr - 33.5
Top inlet
Vr of ≥ 50 L but ≤ 270 L ≤ 35 + 0.2 Vr
Vr of > 270 L but ≤ 454 L ≤ 0.472 Vr - 38.5

Vr = rated nominal storage capacity in litres
W = Watts

* supply pipe external to tank and connection near the bottom.

Standby loss as defined in the CSA test procedure.

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
  • rated input upper/lower elements in watts
  • standby loss in watts
  • cold water inlet configuration, namely, top inlet or bottom inlet
  • Vr, in litres

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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