Need to do the math, I guess.
Own approach is to do the math first.
Bone up on yu enthalpy charts and Mollier diagram equations.
COP of 5 to 6 is easily doable for a small system if your ground temp in winter is > 50F if you oversize the condenser toa ct a s a receiver also (sub-cool) and have enough evaporator for your compressor flow.
Compressor inside heated area (sound suppressed naturally) and you can get 5 kW heat from 1 kW compressor and fan inputs.
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