| WAI PAK VENTILATION CO. LIMITED | Private company limited by shares | Dissolved |
| SUN WAH VENTILATION LIMITED | Private company limited by shares | Live |
| VAIRTECH VENTILATION CO., LIMITED | Private company limited by shares | Live |
| BERK ELECTRIC VENTILATION TRADE CO. LIMITED | Private company limited by shares | Live |
| Good View Ventilation System Company Limited | Private company limited by shares | Live |
| Guangdong Aire Ventilation Co., Limited | Private company limited by shares | Live |
| WING HING AIR-CONDITION VENTILATION ENGINEERING LIMITED | Private company limited by shares | Live |
| iAir Ventilation Engineering Limited | Private company limited by shares | Live |
| Spaceframe Industrial Ventilation Co., Limited | Private company limited by shares | Live |
| MILLENNIUM VENTILATION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Li Rong Ventilation Engineering Limited | Private company limited by shares | Live |
| SCIENTIFIC VENTILATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| PAN ASIAN VENTILATION SYSTEM (SHANGHAI) CO., LIMITED | Private company limited by shares | Dissolved |
| VENTEC VENTILATION ASIA LIMITED | Private company limited by shares | Live |