swimming pool heater Heating: 12-176kW high quality, low price CE,CCC,ISO9001,ISO14001 air source heat pump swimming pool heaterfor constant water temperature setting1. Copeland ... accurate and stable throttling function.3. High efficiency coaxial coil heat exchanger, low fouling, low maintenance cost.4. Durable coating ... unit on/off time clock12. Insufficient water flow protection swimming pool heater