"This Canarm Wall Exhaust Fan is an efficient, easy-to-install, low-maintenance solution for keeping room air fresh. Oversize shipping charge applies. Amps 4.4/2.2, Air Delivery CFM 5,050, Decibel Rating 72, Fan Diameter in. 24, Speeds qty. Variable, Depth in. 16, Fits Opening W x H in. 27 x 27, Dimensions L x H in. 29 1/4 x 29 1/4, Volts 115/230, Needs to be Hardwired Yes, HP 1/3, Speed RPM 1,100. 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"