WF International Limited, operating through its various subsidiaries, specializes in providing comprehensive services for environmental control systems across the People's Republic of China. This includes the procurement, setup, customization, and ongoing upkeep of heating, ventilation, and air conditioning (HVAC) systems, as well as dedicated solutions for water purification, air quality management, and underfloor heating technologies. The company's clientele spans significant commercial projects, such as corporate offices, hotels, manufacturing facilities, airports, and healthcare complexes.