[masraum]

Originally Posted by on2wheels52

Cathy started fall house cleaning late this year. She's a bit concerned that having the screens off for a few days while she's washing the windows (she has a 30hrs/wk day job also) will cool the house enough to cause the heat pump to cycle. Any numbers I can throw to re-assure her it won't make a big difference?
Jim

I don't think that missing the screens will have any noticeable cooling effect on the house. The only reason that "solar screens" keep a house cooler in the summer is because they block the sunlight from getting to the windows. If anything, assuming that it's sunny, then having the screens off should warm the house, not cool it.

The only way that you'd have to worry about the R value of screens is if you had a 1" think bundle of overlapping layers of screen. Then they may offer some insulative value.

If your screens were made of aerogel...