Building Green: High performance windows
Building Green is efficient use of Energy and high performance windows are key. We are a strong believer in Gerkin windows and never anything less than a Low E - argon gas filled double pane window with an air infiltration rating of .04 cfm/ft for their 6'x5' vinyl slider. You can get as low as .02 cfm/ft with their casement window. Watch this video for an understanding of how important air infiltration is. Gerkin is located in Nebraska. You may not see their advertising all over the place, but we've researched and found them to be the best windows for us to provide an Energy Star home. Build Green!
Gerkin Windows & Doors - Air Infiltration Video