Ningbo Aier Ventilation Equipment Co.,Ltd. is one of the manufacturers of ventilation products in China. Our factory covers 25,000 square meter and its located in Yuyao City, east coast of China, very closed to the ports of Shanghai and Ningbo. We have 20 years experience in producing and supplying high quality metal and ventilation products, by focusing on quality in every product, on-time delivery to every customer, and competitive pricing. We have more than 200 manufacturing staff and a strong engineering team, most of our products are exported to America and European markets. Our factory is specialized in supplying HVAC accessories like Iris damper, metal air valve, access door, suspension ring, corner, corner clamp, swirl diffuser, holder, regulator and etc. We pride ourselves on providing outstanding custmer service, competitive prices, priority response, and problem-solving capabilities. Our dedication to continually improving our business and our customer relationships continues to pay off for our customers, employees and the company.