Automatic open/close shutters, features felt-edge weather seal Best-in-class CFM/Watt efficiency for superior air movement Corrosion-resistant aluminum frame & aircraft-grade louvers Hessaire shutter exhaust fans are built to industrial application standards with corrosion resistant extruded aluminum frames which will not rust on any mounted surface even when exposed to the harshest elements. Hessaire shutter exhaust fans are ideal for exhausting heat, fumes, and odor in residential, commercial, industrial and agricultural buildings. Hessaire offers shutter mounted exhaust fans from 8 in. to 36 in. to fit any size opening. 1.5 in. W flanges on the shutters make the unit easy to install. Louvers are constructed with light aircraft grade aluminum alloy for m.
eBay