energy

Does it matter which direction my windows face for energy efficiency?

How do I read all those numbers on the energy label sticker on new windows?

What the heck is solar heat gain coefficient and why should I care?

Does the spacer bar between the panes actually matter for energy efficiency?

If I upgrade all my windows will I need to resize my furnace?

Should I get different window specs for my south-facing windows versus north-facing?

I keep seeing ER rating and U-factor - what's the difference and which matters more?

Everyone keeps trying to upsell me on warm edge spacers - are they actually worth it?

Do quad-pane windows exist and would they even make sense in Ottawa?