Features a high performance 50 CFM blower. Very quiet operation at only 0.6 sones makes this fan barely audible. The WM series features a unique Snap-In Installation System. The included bracket nails or screws to the ceiling joist, then the fan housing “snaps” into place. Connect the wiring using the included wire nuts and strain relief, install the ducting and the easy fitting grill and you are done. A bath fan installation can now be done in minutes. The durable high impact plastic housing ensures lasting, quiet operation and won’t corrode or rust over time. UL listed for installation over a tub or shower on a GFCI circuit. The plastic damper protects against back drafts and ensures quiet operation. For bathrooms up to 45 sq. ft. For other rooms, including powder rooms up to 65 sq. ft. ENERGY STAR certified saving you money annually on your overall energy bill.