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.