This heavy-duty MaxxAir Ventamatic 4 Exhaust Fan blades are driven by a thermally protected motor. This fan is shipped fully assembled in a durable 20-gauge galvanized steel housing with integrated shutters. This fan is a also a good solution for bringing air into industrial and other commercial spaces, and evacuating the bad stuff. The the MaxxAir IF14UPS comes in 3 sizes: 14 inches, 16 inches and 18 inches so you can better tailor your required CFM output. Also significantly, the shutters of this fan also open and close automatically which is great.
18"H x 18"W x 13"D