Swimming Pool Heat Pump, Heat Pump Dryer, Water and Ground Source Heat Pump 17KW China Heat Pumps work by moving heat from one place to another using energy to perform this task. They are used for heating indoor buildings, but they also have outdoors applications such as warming up Swimming Pools. If you are interested in our Water and Ground Source Heat Pump Dryer, Water Source Heat Pump 17KW, you can email or call us at any time.