Great Pool Heater KFR-THP09 Eco Air Source Heat-pump Heater for swimming pool / Pond (9 kW / 30000 Btu)

KFR-THP09 Eco Air Source Heat-pump Heater for swimming pool / Pond (9 kW / 30000 Btu): "The THP09 air source pool heater has a highly efficient Japanese inverter technology Toshiba compressor with typical COP of 6. That means that for every 1000 watts of electricity you are getting 6000 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 30-40 meter cubed with cover. These units have been used for Koi carp ponds with good results."