Heat pumps only work in mild climates though. From what I understand, you can't heat your home with a heat pump in a place like Wisconsin, where the temperature is below 0F for a fairly substantial part of the winter.
I hadn't even heard of a heat-pump until recently, which makes sense, since they seem to mostly be concentrated in warm, dry areas.
Edit: According to Wikipedia, I'm specifically thinking of Air-source heat-pumps, which have a terrible coefficient of performance below 17 degrees Fahrenheit. Geothermal is better, though I believe you still have problems with saturation in cold climates.
I hadn't even heard of a heat-pump until recently, which makes sense, since they seem to mostly be concentrated in warm, dry areas.
Edit: According to Wikipedia, I'm specifically thinking of Air-source heat-pumps, which have a terrible coefficient of performance below 17 degrees Fahrenheit. Geothermal is better, though I believe you still have problems with saturation in cold climates.