Something does not compute. $1000 should be getting them ballpark 10'000 kWh of power. That is 14 kW of constant power use. Typical largest residential GSHP ove

Something does not compute. $1000 should be getting them ballpark 10'000 kWh of power. That is 14 kW of constant power use. Typical largest residential GSHP over here is 15-18 kW of heating at 4 kW compressor power. (usually COP in range 4-5 is specified at 0C input, 35C output) So unless the GSHP is woefully undersized, the house is terribly insulated and the resistive booster heater is running at full tilt, something is wrong with those numbers. For saving money on heating the first step should be to waste less heat rather than making the wasted heat cheaper.