Propane usage ???

[DickR]

Originally Posted by Cobalt

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Pros of heating with Propane
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Propane produces almost no carbon dioxide when burned

Perhaps you meant carbon monoxide. Otherwise, the complete combustion of any hydrocarbon fuel oxides the carbon to CO2 and the hydrogen to H2O. Even the human body does that, although at body temperature. It may be noted, however, that the ratio of CO2 to H2O produced is least for methane (CH4), then ethane (C2H6), then for propane (C3H8). By the time you get up to the chain length of heating oil, 12 or more carbon atoms, the hydrogen/carbon ratio has settled down to around 2 to 1, giving around a 1:1 ratio of CO2 to H2O molecules in the flue gas. Of course, none of this is of any use to the OP's concern about rate of consumption. But it's a slow morning, looking out watching rain turn snow to slush.