Here’s an example of a label with the ENERGY STAR® symbol indicating the zones for which the product is certified.
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Find Out Your Climate Zone
ENERGY STAR® certified windows and patio doors sold in Canada meet precise energy efficiency criteria for three climate zones (1, 2 or 3). Québec covers two of them: zones 2 and 3. Find out which zone your nearest city or town is in.
Products receive ENERGY STAR® certification based on their energy rating (ER). The higher the ER, the more energy-efficient the product. Once you’ve found out which climate zone you live in, choose a product with an appropriate ER value. For example, if you live in Zone 2, choose a product with an ER of at least 29.
Climat zone 2 : Minimum ER required 29
Climat zone 3 : Minimum ER required 34
The ER also makes comparison shopping easier. The ER value is calculated using a formula that balances a product’s rate of heat transfer with its potential solar heat gain coefficient and its airtightness.
Have windows and patio doors installed by a specialist to prevent heat loss and air leakage around the frames. Some retailers offer installation services.
