| CHINA AIR-CONDITIONER MARKET ASSOCIATION CO., LIMITED | Private company limited by shares | Dissolved |
| HOP FUNG AIR-CONDITIONER WATER & ELECTRIC WORKS CO., LIMITED | Private company limited by shares | Live |
| P&W AIR-CONDITIONER & ELECTRICITY ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ON WAI AIR-CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| LEE MAN AIR-CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Tin Po Air-conditioner Engineering Company Limited | Private company limited by shares | Live |
| KAM HO AIR-CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Live |
| LC Air-Conditioner & Engineering Limited | Private company limited by shares | Live |
| LQ Air-Conditioner Engineering Limited | | Live |
| CHEUK KIN AIR-CONDITIONER & ENGINEERING LIMITED | Private company limited by shares | Live |
| Coolest Air-Conditioner Engineering Company Limited -The- | Private company limited by shares | Live |
| HO WAH AIR-CONDITIONER & ELECTRIC ENGINEERING LIMITED | Private company limited by shares | Live |
| EVER PROSPEROUS AIR-CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Good Day Air-Conditioner Engineering Company Limited | Private company limited by shares | Live |
| HANG TAI AIR-CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| HAPPY AIR-CONDITIONER ENGINEERING LIMITED | | Live |
| LIKFAT AIR-CONDITIONER & ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Pak Ning Air-Conditioner & Engineering Company Limited | | Live |
| TAI PING AIR-CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| ProClimate Air-Conditioner Engineering Limited | Private company limited by shares | Live |
| Ruah Air-Conditioner & Engineering Company Limited | Private company limited by shares | Live |
| TELFOO AIR-CONDITIONER ENGINEERING AND TRADING COMPANY LIMITED | Private company limited by shares | Live |
| WING LEE AIR-CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Live |
| TIN YING AIR-CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Choco Air-conditioner & Environment Sanitization Services Co. Limited | | Live |
| JIN FENG AIR-CONDITIONER EQUIPMENT LIMITED | Private company limited by shares | Live |
| Forever Rich Air-Conditioner & Engineering Limited | | Live |
| KAR FUNG AIR-CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| KAR FUNG AIR-CONDITIONER (HK) LIMITED | Private company limited by shares | Live |
| LI HONG AIR-CONDITIONER ENGINEERING LIMITED | | Live |
| HongFai Air-Conditioner LIMITED | | Live |
| Kwong Lee Air-conditioner Engineering Limited | Private company limited by shares | Live |
| Nickan Air-conditioner Engineering Company Limited | Private company limited by shares | Live |
| PERFORMANCE AIR-CONDITIONER ENGINEERING & TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROFESSIONAL AIR-CONDITIONER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| PROFESSIONAL ART AIR-CONDITIONER WATER ELECTRICITY ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| WAI SHING AIR-CONDITIONER ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| YAU SHING AIR-CONDITIONER & ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SUNS AIR-CONDITIONER & REFRIGERATION ENGINEERING LIMITED | Private company limited by shares | Live |
| HAYWA AIR-CONDITIONER SUPPLIES LIMITED | Private company limited by shares | Dissolved |
| Supreme Air-Conditioner & Engineering Company Limited | Private company limited by shares | Live |