Beautiful quilt Jane, and a great idea!
The only a/c I have in my house is a window a/c that I put in my bedroom....usually in August when temps get to 90degrees....a good night's sleep for me is a must. Otherwise, I use floor fans and close the house up in the morning (windows & blinds), and usually only open them back up when it is cooler outside than in. This system works well for me for most of the summer. Once we get those stretches of hot days though...this doesn't work as well, and I figure out things I can do either in my bedroom, or in the basement
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