1. Higher efficient heating/cooling-Saving energy cost 2. Intelligent control-No human attendance is required 3. Corrosion proof titanium heat exchanger-Long life span 4. Strong ABS plastic cabinet 5. Rotary/Scroll world brand compressor 6. Waterproof display and control panel 7. Flow switch protection 8. High/low high pressure switch protection 9. Reverse cycle defrosting 10. Wide working temperature range-Extend swimming seasons 11. Self-diagnosis-Displaying error code on control panel 12. Plug and play instalation and operation 13. Patented Design