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Most Efficient Criteria For Windows And Sliding Glass Doors

Feb 4, 2023 | NRC

Content courtesy of Natural Resources Canada 

Most Efficient Criteria For Windows And Sliding Glass Doors

Natural Resources Canada (NRCan) recognition criteria for residential windows and sliding glass doors sold in Canada 2023

Scope

Windows that meet Version 5 of the ENERGY STAR technical specification for residential windows, doors and skylights sold in Canada.

A window is defined as an assembled unit consisting of a frame/sash component holding one or more pieces of glazing functioning to admit light and/or air into an enclosure and designed for a vertical installation in an external wall of a residential building. This definition also includes all transoms greater than 700 mm (27 in.) in height.

A sliding glass door is defined as a door that contains one or more manually operated panels that slide horizontally within a common frame.

Criteria
The window or sliding glass door must:

* be manufactured by an ENERGY STAR Canada Participant
* be sold in Canada, registered with NRCan as ENERGY STAR certified and posted on the Canada/NRCan website
* meet the labelling section of the Requirements for the labelling and promotion of ENERGY STAR certified fenestration products sold in Canada
* meet the following specific criteria:
* A U-factor of 1.05 W/m2·K (0.18 Btu/h·ft.2·°F) or lower
OR
* An Energy Rating (ER) of 40 (unitless) or higher

Recognition
Most Efficient models will be made available on the NRCan website through the searchable products list for ENERGY STAR certified windows or sliding glass doors. The Most Efficient logo will be available upon request to qualifying manufacturers and their dealers. The 2023 Most Efficient designation may be used in association with window and sliding glass door products recognized during this period for as long as the model remains on the market. The 2022 Most Efficient logo must not be applied directly to the window or sliding glass door as a label.

*The ENERGY STAR name and symbol are trademarks registered in Canada by the United States Environmental Protection Agency and are administered and promoted by Natural Resources Canada.

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