If you've shivered next to a window in January, you already know most heat loss in a Canadian home escapes through glass and poorly sealed frames. Here's what genuinely helps.
1. Go triple-pane in cold-winter cities
In cities with deep freezes — think Edmonton or Ottawa — triple-pane windows with two low-E coatings and argon or krypton gas fill noticeably reduce cold-glass discomfort and condensation.
2. Look for the ENERGY STAR mark for your zone
ENERGY STAR rates windows by climate zone. Buying a unit rated for your zone is the simplest way to guarantee the glass package suits your winters.
3. Installation quality beats the spec sheet
A top-tier window installed with gaps still leaks. Air-sealing, proper insulation around the frame, and a careful installer matter as much as the product — which is why we only feature vetted local pros. Find installers in your city.
4. Stack the rebates
Federal and provincial efficiency rebates frequently apply to ENERGY STAR windows and doors. See the local guide on each city page — for example, rebate notes for Toronto — and ask your installer what's current before you sign.