Hello there. I am a builder of high-performance homes in Minneapolis area. I have developed 5 Passive homes in the last 3 years and used Access Windows out of Canada. they are uPVC and are build of the Rehau Geno Profile. https://www.rehau.com/us-en/windows   I am now working on developing my 6-10 passive homes i am now looking at other manufactures. Not b/c the windows were not good but as a step of due diligence to see what the market has to offer in terms of price features and durability. .  Has Anyone used Oknoplast windows.  https://oknoplast.us/