| SUN FAT AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Dissolved |
| WAH NAM AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Pro Air Conditioning Company Limited | Private company limited by shares | Live |
| LEE FU AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Live |
| PAN ASIA AIR CONDITIONING LIMITED | Private company limited by shares | Live |
| CHUNG HWA AIR - CONDITIONING COMPANY LIMITED | Private company limited by shares | Live |
| EASY AIR CONDITIONING LIMITED | Private company limited by shares | Dissolved |
| Champions Cleaning Service & Air Conditioning Engineering Limited | Private company limited by shares | Live |
| Goodwill Air Conditioning Limited | | Live |
| JEFF AIR CONDITIONING CO LIMITED | Private company limited by shares | Live |
| LICO AIR CONDITIONING LIMITED | Private company limited by shares | Live |
| Pan Ocean Air Conditioning Company Limited | Private company limited by shares | Dissolved |
| POLY AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Dissolved |
| QUIET & COOL AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Live |
| TAT FAI AIR CONDITIONING SERVICE LIMITED | Private company limited by shares | Live |
| E K Air Conditioning Service Company Limited | Private company limited by shares | Live |
| YUKON AIR CONDITIONING SERVICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Solar Man Air Conditioning, Limited | Private company limited by shares | Live |
| Times Air Conditioning Limited | Private company limited by shares | Live |
| TONLUCK AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Dissolved |
| YONAN AIR CONDITIONING COMPANY LIMITED | Private company limited by shares | Dissolved |