I have a JAYCO Eagle and I would recommend getting the double pane windows. I bought mine after Hurricane Michael destroyed my house and we lived in it for 2 years. We couldn't keep the RV cool in the summer even with blackout shades on all the windows, extra insulation in the pantry and closets, and foam covers in the vents. We ran both A/C units and they would kick on early in the morning and run constantly until well after dark. Inside temperatures would get into the mid 80s on sunny days.