Our propane and electric usage for the winter was slightly lower, and our wood usage was maybe 20% lower than last year, even with a colder winter. I forgot the degree day difference, but I figured it all out a couple months ago. I know january was the coldest since I moved into this house 10yrs ago. I think the main help was in window coverings. I put plastic on all the same windows as last year, but this year I added dark blankets too. I even put them on the skylight and patio door. makes a difference
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