Dongguan Quanda Environmentally Friendly Ventilating Equipment Co. is a company specialized in the design and production of air movement equipment. Established in 2008, we manufacture an extensive selection of air handling systems that include centrifugal fans and blowers, axial fans, roof exhausters and ventilators, vents and diffusers, and sound attenuators. This equipment is designed for high-performance ventilation and smoke extraction system applications for many different building types, including high-rises, office buildings, factories, entertainment venues, and residences.