skyemoor wrote:Tell us about your square footage (and if you will be heating the garage most of the time). What is your wall insulation (R-21? R-25? other?), ceiling insulation?
All things being equal, the geothermal heat pump will cost about 1/4 to 1/3 the electricity of an air source heat pump. Since you have a fossil fuel backup, it may be closer to 1/3 to 1/2, though then you have to add in fuel costs.
If you are in the woods, I'd say put in an efficient woodstove and use that primarily (or at least when the temps are below freezing). Then a $30k geothermal system wouldn't be necessary.
WisJim wrote:In addition to expense every "geothermal" heating system--I am assuming you are talking about ground source heat pumps--have had compressor and /or control problems, and there aren't a lot of people that know how to fix them.
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