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A Leader in HVAC Accessories & Custom Metal Stamping Parts Manufacturing

Established in 1997, Yuyao Jingqiao Hardware Factory (also as Ningbo Aier Ventilation Equipment Co., Ltd) has been the leading manufacturer of HVAC Accessories & Custom Metal Stamping Parts for over 20 years. JH/Aier provides a comprehensive range of HVAC accessories for round and rectangular ductwork system.


These include iris dampers, ventilation pipe clamps, duct suspension clamps, duct access doors, tabbed access doors, metal disc air valves, circular external louvres, ceiling swirl diffusers, damper regulators, flange G clamps, as well as flange corners among others.

JH/Aier strives to support its customers by the following key objectives:
  • Competitive Pricing
  • Strict Quality Control
  • Fast & Stable Delivery Time
  • Comprehensive Range
  • Strong R&D Support
  • Excellent Customer Service
JH/Aier can satisfy all your needs over your expectations!
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Why choose us?

We do what we do best

Competitive Price

High level automation reduces labor cost greatly, enable Aier to provide the best prices among Chinese competitors.

Strict quality control

ISO 9001 certified & SGS audited manufacturer, strictly perform Quality Control before, during and after production

Comprehensive range

A big range of Duct Fitting Accessories & Air Distribution Products enable customer source everything in one stop.

Strong R&D support

Inhouse tooling workshop and dedicated R&D engineers enable Aier to develop new products for customer more easily and cost efficiently.

Fast delivery

Large scale production & keeping semi-finished safety stock enable Aier to provide fastest delivery lead time for satisfying urgent need

Customer service

Aier does not only supply products but also deliver added-value services to customer (Pre-shipment inspection report, Shipping.
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