"This Canarm Wall Exhaust Fan is an efficient, easy-to-install, low-maintenance solution for keeping room air fresh. Fan Diameter in. 12, HP 1/4, Air Delivery CFM 1,640, Amps 1.8, Dimensions L x W x H in. 17 1/4 x 14 x 17 1/4, Needs to be Hardwired Yes, Speed RPM 1,625, Speeds qty. 1, Volts 115, Dimensions L x H in. 17 1/4 x 17 1/4. Totally enclosed and thermally protected motor Blades are galvanized and well-balanced for durability and efficiency Heavy wire chrome-plated OSHA guards Rugged steel welded box housing with durable powder-coated finish Aluminum louver shutters with long life nylon bushing"