Air source heat pump: 1) Automatic control 2) Wide application 3) High COP value Air source heat pump features:1. Various types can be applied for different size swimming pool.2. More efficient of heat transfe, which can help to save 65~80% operating cost annualy.3. water and electricity isolation, no fire, no leakage, to ensure personal security.4. Unique material of the heat exchanger, without ...