hot sales 36kw pool water heater heat pump for shcool KFXY-036UCII Swimming Pool Heat Pump, Commercial Swimming Pool Heat Pump 1) PVC Titanium heat exchanger with full resistance against corrosion, more durable. 2) Compact structure, easy demountable for access. 3) High efficiency compressor, saving energy. 4) Flow switch for water flow protection. 5) Intelligent controller and adjustment by quick mind microprocessor. 6) Intelligent LCD display wired controller. 7) Air exchanger (fins-coil )with hydrophilic coating. 8) Automatic defrosting function included. Optional: R410a, R22, R407c refrigerant is available.