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