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nope, too many variables. My house in Texas is 2460 sf, Trane forced air (probably close to 90% efficient too), stove/oven, 40 gal water heater, and 40k btu gas logs. I go through 250 gals of propane in 4 months during my winters.
After the first quick fill like that, I changed my heating behavior to put the furnace on 60 degrees and run only the gas logs. I would sometimes put on the central fan to more quickly distribute the heat through the house since the return air is in the same room as the gas logs. My refill rate dropped back to every 7 months of winter with that usage and the house was just as comfortable.
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