Heat pumps, geothermal and AC
Heat pumps: what they are and how they work
...Heat pumps are also quite versatile; they can be used to heat incoming air from the outside, or as an air-to-water heat pump for generating residential hot water. Heat pumps are also used in conjunction with geothermal heating and cooling, where the heat is either taken from, or added back to the ground.
Heat pumps may...