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About product and suppliers:
        Alibaba.com offers 35,656 duct fan products. About 41% of these are centrifugal fans, 40% are axial flow fans, and 4% are hvac systems & parts. 

A wide variety of duct fan options are available to you, such as ccc, ce, and csa. You can also choose from duct fan, free standing, and roof fan. As well as from dc, ac. And whether duct fan is plastic, stainless steel, or cast iron. 

There are 35,352 duct fan suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Ukraine, which supply 97%, 1%, and 1% of duct fan respectively. 

Duct fan products are most popular in Western Europe, Domestic Market, and North America. 

You can ensure product safety by selecting from certified suppliers, including 15,474 with ISO9001, 5,833 with Other, and 1,404 with ISO14001 certification.