We have the double pane windows. Huge difference in the ability to keep the inside cool when it 110 in the shade. We shall see how well it works this fall/winter when we try and keep it warm. So far, I wouldn't be without them.
2014 Dodge 3500HD Cummins Crew Cab, Dually, Aisin, 3.73, 4x4, Long bed, Curt Q20. Appliance White!
2015 Jayco Eagle 339 FLQS