Product features:  1. Safety: water and electric separately.  2. Hot water ( 55° c ) an be provided constantly even ambient temperature down to -25° c. 3. Evi special compressor of copelnd, sanyo or hitachi will be used, reliable quality with high performance. 4. Auxiliary electric heater, insulation materials used for compressor protection. 5. Convenient: intelligent microprocessor with touch screen display. Trouble shoot shows on display board automatically.  6.World famous brand compressor, 4-way valve, motor, pcb, heat ex-changer, emerson alco expansion valve used. 7. Multiple protection function: high pressure, low pressure, overheating, overload anti-freezing, phase sequence,  discharge temperature, suction temperature and so on.  8. All weather operation: stable operation without being influenced by weather.  9. Anti-corrosion: plastic case, coated steel or sus304# stainless steel case are available.  10. Refrigerant of r22, r407c, r410a, r417a are for optional.  11. Automatically defrosting function included.  Join to us, get the future together, we warmly welcome customers from all over the world!