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70 degrees during the heating season while we are home 66 at night.
There is a point of diminishing returns when you consider the amount of heat energy to bring the home back up to daytime temperature after the night time setback. Think of heat energy being similar to a flywheel effect. You have spent good money to bring the wheel up to speed, letting it slow down (cool off) too much will cost you money to bring the flywheel (thermal mass of the building) back up to speed.
During the short cooling season here, the stat is set for 75 degrees while we are home.
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Bill K.
"I started out with nothin and I still got most of it left...."
83 911 SC Guards Red (now gone)
And I sold a bunch of parts I hadn't installed yet.
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