"This Canarm Wall Exhaust Fan is an efficient, easy-to-install, low-maintenance solution for keeping room air fresh. Volts 115, Dimensions L x H in. 25 1/4 x 25 1/4, Speed RPM 1,725, Air Delivery CFM 3,440, Amps 5.3, Needs to be Hardwired Yes, HP 1/3, Dimensions L x W x H in. 25 1/4 x 16 x 25 1/4, Speeds qty. 2, Fan Diameter in. 20. Totally enclosed and thermally protected motor Galvanized blades are 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"