... 3. Hermetic scroll compressor 4. R22,R407C,134a HAL Series Air Cooled Air Conditioner Features: 1. Suitable buildings : shopping markets, cinemas, schools ... noise and convenient.5. High indoor air quality: large amount of fresh air, you can also choose to install HEPA ... .7. Refrigerant: R22,R407C,R134a for choice.8. Air conditioner type: ceiling mounted, floor standing, free blowing type, ducted type ...