Interesting topic. When we are away for long periods of time we set the A/C at 81 and forget about it. When we are home we turn the A/C down to 73 before getting ready to go to bed and it stays there until we get up in the morning. When we get up we turn it up to 78. I have no proof to back this up, but I gotta believe that keeping the house at 78 during the hot sunny daylight hours saves money rather than keeping the house at 73 all the time? When we come into the house from being outside, 78 seems nice and cool to us.
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