Pool Heater KFR-THP21 Air Source Heat-pump Heater for Swimming pool Pond 21 kW 71000 Btu

KFR-THP21 Air Source Heat-pump Heater for Swimming pool Pond 21 kW 71000 Btu: "The THP21 air source pool heater has a highly efficient Japanese inverter technology Toshiba compressor with typical COP of 5.8. That means that for every 1000 watts of electricity you are getting 5800 watts of heating. Compared to regular electric or oil systems the energy  saved would pay for the cost of the unit within the first two years. Easy installation makes this unit  ideal for direct replacement of your existing system. Ideal for pools of 80-100 meter cubed with cover. These heat pump units have also been used for Koi carp ponds with good results."