It's been a warm winter and it's gearing up to be a hot summer. I've got a question about home cooling and was hoping OT might have the answer...my search fu has turned up nothing. Is it more energy efficient to: a) leave the thermostat set to say...83F while no one is home then adjust as necessary when I get home? or b) turn the A/C completely off while no one is home then crank it up when I get home? I've always gone with "b" and there were times when I'd get home and it'd be 94F INSIDE! "b" would result in the A/C running continuously for hours to get to the desired temperature. A friend told me he leaves his on because it takes more energy to get those kinds of inside temps down to a comfortable level than leaving it set to a moderate level. It makes sense that "a" would "save" the energy needed to cool down the house but how does that compare to energy needed to maintain a moderate temp? Depending on how you define moderate, I imagine there's a point where the energy needed to maintain a temp is equal to that necessary to cool a house down to that temp. I wonder what that point is. Anyone know? Anyone have any links to actual data?