We put in a solar attic fan. Made sense to me if only moving some air. Never looked at it for any payback or anything like that. We keep the AC at 80 in the summer since we are not there and if it ever breaks, I will not know since it doesn’t make noise.
Looked into a garage fan this past year but I thought it would vent it to the outside but since it just dumps more hot air into the attic I decided against it.
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