... :Copeland 3. Durable usa:15 years 4.Safe,energy-saving, Swimming pool heat pump air to water1.Durable usa:15 years2 ... flow switch inside4) Advanced controlling: extremely easy to control. The swimming pool heat pump unit is in the room, because of ... . In recent years, many families, schools, factories, hospitals, military, hotels, swimming pools and other units all over the county have been using ...