To cool down during a summer heatwave, users suggest various methods to trap cool air indoors. One popular suggestion involves taping sheets to walls, with alternatives like blankets and shower curtains also effective. A blanket offers a thicker barrier, while a clear shower curtain can trap heat in winter but may not block sunlight effectively in summer. Additionally, a tension rod may serve as a more permanent solution for holding coverings in place.
Several commenters said they apply the same general principle to trap cool air in a room. Commenter cindy54536 prefers a blanket for a thicker blocker, and Cindy and nikki8112 both say that blankets can also keep warm air in in the wintertime.
Commenter judyann6802 used a clear shower curtain, which works great for trapping heat in winter and cool air in the summer, but she warns that in the summertime, it's not great for blocking sunlight.
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