Product details:

At the highest point the grill projects only 1/2 down from the ceiling. The electronically balanced centrifugal blower wheel assures maximum ventilation with minimum sound. Install using the adjustable hanging brackets for 16 centers. 4 metal duct collar with back draft. Motors are suitable for continuous operation. UL Listed over a tub or shower on a GFCI circuit. HVI2100 Certified. Housing Dimensions: 10-7/8 W x 9-3/8 D x 7-7/8 H.