... freely from many running mode:cooling,heating,cooling/heating+hot water,hot water only. Water Source Heat Pump multi-function typeCooling Capacity 4.5kw-75.3kwHeating Capacity ... hot water(total heat recovery) 6, Heating+hot water(partial heat recovery)Refrigerant:R407C, R410a, R290, R134a, R22Characters:Anti-freeze thermos Water Source Heat Pump use underground water or circulated water ...