I have all my windows from Jack, installed on my a...

I have all my windows from Jack, installed on my almost zero energy house. The windows are performing great and the energy savings claimed by the manufacturer are real (low E.and so on..) so I have huge energy savings and the windows contribute to that in a big %. Get high quality windows from Jack cause they know how to get you good quality at affordable/competitive prices. Would highly recomend to others, and would get more windows from Jack for my next project.