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Old 01-27-18, 04:34 PM   #42
Lurking Renovator
Join Date: Jan 2018
Location: Mechanicsburg, PA
Posts: 19
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I did mine with Propane. NG doesn't have the market volatility that LP does. Mine can be anywhere between 22* to 41*. This year based on market conditions of electric vs LP, I'm at 40*. Also don't forget system efficiency AND age of he system.

At -15*=like $9/gallon LP, rough guess not knowing particulars.

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