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gbj_tester in reply to @RagnarHairybreeks

By the (Carnot efficiency) numbers:

Stove T_H ~600K (exhaust gas temperature), T_C ~290K (intake air temperature)

1-(290/600)=0.51

If you're not going to steal from the "house" side (which can't work, because you'd have to increase the refrigerant compressor power consumption more than the work you could get out of a refrigerant expansion turbine, to avoid violating the 2nd law), the temperature differential available from a ground source heat pump is at maximum
T_H ~280K (soil temperature), T_C ~260K (refrigerant compressor intake)

1-(260/280)=0.07

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jellybaby in reply to @gbj_tester

to avoid violating the 2nd law

What if you deny you are doing that and then apologize later?

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gbj_tester in reply to @jellybaby

What if you deny you are doing that and then apologize later?

Then you get a FPN which is more than the electricity bill would have been, thus confirming the inviolability of natural laws.

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