Depending on the house, keeping it cool when there aren't people moving around and breathing in it may not take very much. One of the selling points for me when I bought my house was that it was only about 80 inside when opened up after sitting with the electricity off (so the AC had definitely NOT been running recently) during 95+ weather; my AC doesn't run much at all during the day when nobody's home.
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Date: 2010-05-25 04:00 pm (UTC)