How to utilize cool basement / crawl space air to help cool the house?
I have a house on a hillside about 1300 sq. feet with a walk in basement/crawlspace under the entire house. I am located in Atascadero, CA 93422, which has hot, low humidity days in the summer but cools off rapidly in the evening. It is extremely rare that I need cooling in the evenings.
Earlier this year I lost a large shading oak and I noticed my AC electric bill went up a lot. I’ve been exploring solar panels but so far the equations are pointing to little difference in monthly costs. Lately I’ve been thinking there must be a way to utilize the cool air in the basement to cool the house prior to the AC kicking in during the heat of the day. I should think that some of the time I could rely completely on the basement air and need AC only on the hottest days.
My house is divided with MB at one end, high ceiling great room and kitchen in center and 2 BR and bath at other end. The attic space is likewise divided over the ends and no attic in the center.
I believe I could mount a whole house fan in a gable end of the attic at the center great room area overlooking the living room. Or I could mount an attic fan at the other end of the attic exhausting out the gable end. But then I would need that to turn off when AC is on or it would just suck out the AC air.
I guess I would need to add a floor register to allow the cool air to come up or maybe there is some way to have it use the central AC ducts?
Just throwing out my ideas/questions for anyone to comment on or send me links to other sources.
Any help/ideas are appreciated.
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