Building Exhaust fans are classified into various types, mainly depending on the type of mount and the location where you need to install the fans. The different types are: Additional information can be found at the Ventilating Fan company web site http://www.ventilating.com/products/industrialfan_blowers.html Oleg Tchechel Canadian Process Air Systems Engineer Ventilating Fan Co. nis-co@nis-co.com http://www.ventilating.com/products/ilg.html http://www.ventilating.com/products/ventilators.html
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