Ground source heat pump is the use of water and ground energy (groundwater, soil or surface water) for hot and cold exchange as a source of heat and cold source of ground source heat pump, the ground in the heat to "take out" for indoor heating, this time Earth can be "heat source"; in summer, the indoor heat is taken out and released into groundwater, soil or surface water, at this time the ground can be "cold source." Keyword Search: more heat pump product information