| S & S AIR CONDITIONER LIMITED | Private company limited by shares | Live |
| Hou Dak Air Conditioner Limited | | Live |
| Android Air Conditioner & Electrical Engineering Co., Limited | Private company limited by shares | Live |
| KASEN AUTO AIR CONDITIONER PARTS (CHINA) LIMITED | Private company limited by shares | Live |
| JINYOUNG AUTOAIR CONDITIONER LIMITED | Private company limited by shares | Live |
| BEST AIR CONDITIONER LIMITED | Private company limited by shares | Dissolved |
| HAMA AIR CONDITIONER BRACKETS (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| CELEVIC AIR CONDITIONER (H.K.) CO. LIMITED | Private company limited by shares | Dissolved |
| New Chance Air Conditioner Engineering Company Limited | Private company limited by shares | Live |
| CHINA AIR CONDITIONER CO., LIMITED | Private company limited by shares | Live |
| China Air Conditioner Network Co., Limited | Private company limited by shares | Live |
| Ouber Air Conditioner Co., Limited | Private company limited by shares | Live |
| EAST ASIA AIR CONDITIONER LIMITED | Private company limited by shares | Live |
| Luxury Electronic Air Conditioner Limited | Private company limited by shares | Live |
| TAK FAT AIR CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| WAH NAM AIR CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Live |
| Wah Fat Air Conditioner & Engineering Company Limited | Private company limited by shares | Live |
| 3T Air Conditioner Engineering Limited | | Live |
| CHONG WO AIR CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| CONSTANT WIN AIR CONDITIONER & ENGINEERING LIMITED | | Live |
| FUTURE AIR CONDITIONER ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| SUN FAI AIR CONDITIONER ENGINEERING (HK) CO. LIMITED | Private company limited by shares | Live |
| HONEST SUN AIR CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Live |
| MEGWELL AIR CONDITIONER & ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Man Ming Air Conditioner Engineering Company Limited | | Live |
| LUCK RICH AIR CONDITIONER ENGINEERING LIMITED | | Live |
| SUCCESS AIR CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| HOP LEE AIR CONDITIONER TRADING AND ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| TSANG'S AIR CONDITIONER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Tung Fat Air Conditioner & Engineering Company Limited | Private company limited by shares | Live |
| WING TUNG AIR CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Live |
| UNITED AQUARIUM & AIR CONDITIONER ENGINEERING LIMITED | Private company limited by shares | Live |
| Lik Feng Air Conditioner & Engineering Company Limited | Private company limited by shares | Live |
| Lik Feng Air Conditioner Hong Kong Company Limited | Private company limited by shares | Live |
| FUHUA ELECTRONIC AIR CONDITIONER LIMITED | Private company limited by shares | Live |
| Din Fung Air Conditioner & Engineering Company Limited | Private company limited by shares | Live |
| Tim Fung Air Conditioner & Engineering Limited | | Live |
| SIU FUNG AIR CONDITIONER PARTS LIMITED | Private company limited by shares | Dissolved |
| Great Air Conditioner Co., Limited | Private company limited by shares | Live |
| GREAT OCEAN AIR CONDITIONER MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| HARVEST AIR CONDITIONER LIMITED | Private company limited by shares | Live |
| Hebei Hengli Air Conditioner Engineering Co., Limited | Private company limited by shares | Live |
| Skyworth Air Conditioner (Hong Kong) Co., Limited | | Live |
| AIR CONDITIONER HOUSE LIMITED | Private company limited by shares | Live |
| H.K JUNCHENG AIR CONDITIONER EQUIPMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 27-Dec-2012 |
| KWONG ON AIR- CONDITIONER PARTS SUPPLY LIMITED | Private company limited by shares | Live |
| MODERN CONDITIONER AND ELECTRICAL LIMITED | Private company limited by shares | Live |
| RITZ AIR CONDITIONER PARTS LIMITED | Private company limited by shares | Live |
| SHEEN SKY AIR CONDITIONER PARTS LIMITED | Private company limited by shares | Live |
| SUN PONG AIR CONDITIONER & ENGINEERING LIMITED | Private company limited by shares | Live |
| POWER CONDITIONER (H.K.) LIMITED | Private company limited by shares | Live |
| Sanwa Electronic Air Conditioner Limited | Private company limited by shares | Live |
| Chilling air conditioner service Limited | Private company limited by shares | Live |
| KAN SHING AIR CONDITIONER LIMITED | Private company limited by shares | Dissolved |
| KAN SHING AIR CONDITIONER LIMITED | Private company limited by shares | Live |
| Hip Shing (Hong Kong) Air Conditioner Engineering Limited | | Live |
| SIM-PRO AIR CONDITIONER LIMITED | Private company limited by shares | Live |
| MING LEE AIR CONDITIONER & THERMAL CO. LIMITED | Private company limited by shares | Dissolved |
| Unique Unlimited Air Conditioner Limited | | Live |
| VATELY (HK) AIR CONDITIONER CO., LIMITED | Private company limited by shares | Dissolved |
| WILSON AIR CONDITIONER & ELECTRICAL ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| WING CHUEN AIR CONDITIONER WORKS LIMITED | Private company limited by shares | Dissolved |
| GENERAL COOL-HEAT AIR CONDITIONERS (THAILAND) LIMITED | Private company limited by shares | Live |