One rule of thumb is for every degree you set back the thermostat, you save 3 percent on your heating bill. That's assuming it's 24 hours per day. If for eight hours of sleep and eight hours of work you set back the thermostat 3 degrees, that's a savings of 6 percent.

Bill Prindle

Degree Heating One Percent Rule Save Set Thermostat Thumb

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Food that can be eaten with one hand is our rule of thumb.

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Or another rule of thumb is to add one car length for every 10 mph you are traveling.

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I'm throwing good, my thumb is 100 percent,

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