Originally Posted by yardsale
Regarding condensation. We use our 17b a total of 9 weeks last winter in temps as low as -23 degrees F. With heat and the top vent open about 1" there was no condensation on the walls. Moderate condensation formed on both the double pane and single pane windows once temps fell below, say 25 degrees. The worse condensation (frost) occured on the metal window frames as they are apparently an effecient thermal bridge to the outside. We have covered all the window frames with insulating tape to mitigate this in the future. Our solution to the condensation is wait until the frost melted in the morning and then wipe the wet surfaces down. Bit of a chore but no big deal.
I have tried several solutions and the frame insulation has been discussed before. My latest, and most successful, is the use of "Warm Window Fabric" sewn into insulated curtain material. If I had left the shades in place these would go all the way around the window, but since we replaced the shades with warm window curtains which cover both the top and the bottom of the window, we only needed to do the sides. I have attached several pics. They are held in place by velcro. The velcro on the windows is "high temp" velcro and the frame was prepped with 3M primer. They hold great and the strips really reduce both heat and cold gain on the frames.