- May 21, 2001
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I read somewhere that it's more efficient to leave your air conditioner on all day even if you are not there than it is to turn it on when you get home, forcing the recooling of your whole home. Can anyone speak to the validity of that? It's in the 90s here in Baltimore and I've been leaving my AC on low when I go to work every day but I'm wondering if that's the best choice.