Highlights Wide Capacity Range: 1.5-7 ton (Residential), 10-50 ton (Commercial) Using heat energy from ambient air and reproduces more heat energy, saving 60%~80% energy compared to traditional heaters. Providing heating in water and chilling in summer for spa and swimming pool in domestic and commercial applications No potential danger of any inflammable, gas posioning, explosion, fire, electric shock which are associated with other heating systems. A digital controller is incorporated to maintain the desired water temperature. Long-life and corrosion resistant composite cabinet stands up to severe climates and pool chemicals. Tropical rotary or scorll compressor ensures outstanding performance, ultra energy efficiency, durability and queit operation. Titanium tube-in-shell heat exchanger resists harsh pool chemicals and corrosion. Self-diagnostic control panel monitors and troubleshoots heat pump operations to ensure safe and reliable operation. Intelligent digital controller with friendly user interface and blue LED back light. Separate isolated electrical compartment prevents internal corrosion and extends heat pump life. The heat pump can operate at ambient air temperature of -10℃~54℃.