Ningbo Aier Ventilation Equipment Co.,Ltd (Yuyao Jingqiao Hardware Factory) is one of the manufacturers of HVAC products in China,Our factory covers 25,000 square meters and it’s located in Yuyao City, east coast of China, very closed to the ocean ports of Shanghai and Ningbo. We have 20 years experience in producing and supplying high quality ventilation products, such as iris dampers. https://www.jhystamping.com/
