"This Canarm Wall Exhaust Fan is efficient, easy-to-install and low maintenance. Air Delivery CFM 3,150, Fan Diameter in. 18, HP 1/3, Depth in. 21, Dimensions L x H in. 23 1/4 x 23 1/4, Dimensions L x W x H in. 23 1/4 x 21 x 23 1/4, Needs to be Hardwired Yes, Speed RPM 1,700, Amps 3.8/1.9, Volts 115/230, Speeds qty. Variable. 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-coat finish Aluminum louver shutters with long life nylon bushing Requires hard-wired connection"