Electric water heaters

Energy Efficiency Regulations

Regulatory definition

Electric water heater, a stationary electric storage tank water heater that is intended for use on a pressurized water system and has a capacity of at least 50 litres (11 imperial gallons) but not more than 454 litres (100 imperial gallons).

Compliance date

Manufactured on or after February 3, 1995

Compliant product models

Electric water heaters 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 electric water heaters
Product type Maximum allowable standby loss
September 2004
(W)
Bottom inlet *
50 to 270 litres
(11 to 59 Imperial gallons)
40 + (0.20V)
270 to 454 litres (60 to 100 Imperial gallons)--> > 270 to 454 litres
(60 to 100 Imperial gallons)
(0.472V) – 33.5
Top inlet
50 to 270 litres
(11 to 59 Imperial gallons)
35 + (0.20V)
270 to 454 litres (60 to 100 Imperial gallons)--> > 270 to 454 litres
(60 to 100 Imperial gallons)
(0.472V) – 38.5

Where V = rated 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
  • rated input upper/lower elements in watts
  • standby loss in watts
  • type of cold water inlet: top or bottom

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.