Product features: 1. Safety: water and electric separately. 2. Using renewable energy: getting energy from land or water, without any effect from climate, super cop, decrease electric comsumption to protect our earth. 3.Base frame and external panels made of galvanized powder coated steel or stainless steel which is good at anti-corrosion and rusty. refrigerant of r22,  r407c, r134a are for optional. 4. Convenient: intelligent microprocessor with touch screen display. Trouble shoot shows on display board automatically. 5. World famous brand compressor, 4-way valve, motor, pcb, heat ex-changer, emerson alco expansion valve use to ensure top quality an high efficiency (energy-saving as much as 75%). 6. Water flow switch equiped for water flow protection. 7. multiple protection function: high pressure, low pressure, overheating,  overload anti-freezing, phase sequence, discharge temperature, suction temperature and so on. 8.Automatically defrosting function included.  Dibetter products are much welcomed by our customers all over the world.Widely used in houses, villas, factories, schools, hotels, hospitals, beauty parlor, bath centers, tcm pharmacy, swimming pool, large shopping plaza, industry, etc..