Heat pumps, geothermal and AC
Heat Pump Buying Guide: Review of the top 10 Heat Pumps for 2025
...Performance Factor) measures heating efficiency. The (S)COP (Coefficient of Performance) indicates the ratio of heating or cooling output to energy input, showing the pump's overall efficiency. To make a solid comparison, look at these ratings based on your climate and usage—SEER for cooling needs, HSPF for heating, an...