VENTECH Ventilation Co., Ltd. is one of the leading manufacturers of air diffusion products in China.With advanced technology and strict quality control, VENTECH is dedicating in designing and offering a wide range of air diffusers and grilles, dampers, flexible aluminium ducts, and other duct accessories. Now VENTECH products sell to more than 30 countries and win a high reputation in this field.VENTECH people are ready to cooperate with you to provide a comfortable way of handling air in the world.