This Canarm Wall Exhaust Fan is an efficient, easy-to-install, low-maintenance solution for keeping room air fresh. Amps: 6.6/3.3, Dimensions L x H (in.): 41 1/4 x41 1/4, Needs to be Hardwired: Yes, Speed (RPM): 850, Speeds (qty.): 1, Dimensions L x W x H (in.): 41 1/4 x 16 x 41 1/4, HP: 1/3, Air Delivery (CFM): 12,000, Fan Diameter (in.): 36, Volts: 115/230