I'm building a new home in northern New York, climate zone 4 and wish to get the most energy efficient windows I can afford. It appears I need windows with a U-factor of less than 0.2, so these should be triple-pane. I have looked at Marvin, Pella, and Loewen. Any comments would be appreciated.
Also, I understand that the SHGC must be less than .4 to get an Energy Star rating, but blogs on passive house say that the SHGC rating (for South-facing windows) should be greater.
This is my first posting on this forum and I hope it's the right one. I got to it by joining GardenWeb, and most forums here are garden-related.