
Zhejiang Preair Electrical Appliance Industry Co., Ltd. develops and manufactures commercial and industrial dehumidifiers and IAQ solutions, backed by large-scale production and in-house testing capabilities.
Zhejiang Preair Electrical Appliance Industry Co., Ltd. specializes in the development and production of commercial and industrial dehumidifiers, providing dependable humidity control solutions for homes, commercial spaces, and industrial environments.
The company offers both customized and finished dehumidification equipment and has built a full product line to address diverse applications such as water damage restoration, crawl space and basement humidity control, greenhouse dehumidification, and mold prevention. Its solutions are also used in demanding sites including archives, power distribution rooms, sports venues, factories, hospitals, and other healthcare facilities.
Manufacturing is supported by an integrated factory in Hangzhou, featuring multiple production workshops—such as sheet metal, spray-coating, and rotational molding—along with office buildings and environmental protection facilities. The site includes a CNAS Lab testing facility and is equipped with fully automatic and semi-automatic production lines plus laser numerical control sheet metal equipment and rotational molding production equipment.

Preair focuses on the development and production of commercial and industrial dehumidifiers, delivering reliable indoor humidity control and indoor air quality solutions.
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The dehumidifier portfolio is positioned around high efficiency, low energy consumption, strong dehumidification capacity, long service life, and cost-efficient performance across home, commercial, and industrial uses.