I didn’t recognize the term ‘decatherm’ until I looked it up.
Approximately the equivalent of burning 1000 cubic feet of natural gas (a therm is approximately the equivalent of burning 100 cf of gas).
However the math turns out, it is good to realize the many electric power utilities burn gas to generate electricity, so in that case you would be paying the electric company to process the electricity into power that you would, in turn convert to heat. In many cases it would turn out to be inefficient.
My choice was a ceiling mounted gas furnace which draws outside air for combustion and has a power vented exhaust.
Still, I try not to run it except for important work. Social Security doesn’t provide that much for extras!
-- The best things in life aren't THINGS.
