We ordered three cell insulating window shades from blinds.com for the upstairs.. I put them up last night. It was a sunny day in the low 80s today. There is 1 window facing directly South, and 2 facing directly West. The 2 facing East are shaded by Norway spruce and aren't a factor. The temperature in the room rose 2 degrees. Downstairs did not raise a single degree. I think I'm going to like these shades!