Air King AK280LS Energy Star Qualified Deluxe Quiet Dual Speed Exhaust Bath Fan 280 CFM at .10" SP. 257 CFM at .25" SP For bathrooms up to 280 sq. ft. For other rooms up to 350 sq. ft Acceptable for use over tub or shower when installed in a GFCI protected branch circuit Energy Star rated, meets Made in America requirements of ARRA, UL approved, meets ASHRAE 62.2 standard. Can be used to comply with Title 24 requirements Mounts in ceilings with at least 10" clearance and through drywall up to 3/4" thick with rough-in opening of 13 1/8" x 13"