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Old 12-08-19, 04:58 PM   #36
Bicycle Bob
Join Date: Sep 2008
Location: Spiritwood, Northern Saskatchewan
Posts: 42
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Before I ask for prices, I want to have a size in mind, and my current furnace has no indication of BTU output by the numbers. Is there a decent formula for estimating that from the bills on the cold months? On the very worst days, it runs half the time.
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