Broan QT Series ventilation products offer the rare combination of power and extremely quiet operation. Nearly silent operation: 80 CFM - 0.8 Sones. ENERGY STAR® Qualified and Title 24 Compliant New Improved Lighting! Brighter, broader and smoother while using 14% less energy! 36 Watt GU24 fluorescent light - (2-18 watt bulbs included). 4W nightlight (bulb sold separately) Polymeric grille is an innovative design - the result of extensive research with designers and consumers Recommended for baths up to 75 sq. ft. 4" ducting; fits 2 x 8 construction Grille Dimension: 12-3/8" x 14". Housing Dimension: 10-1/2" x 11-3/8" x 7-5/8" Motor engineered for continuous operation UL Listed for use over tub/shower with GFCI circuit Hanger bars for Easy, Fast and Universal installation in all types of construction Available in Project Packs (QTRE080FLFT) Can be used to comply with ASHRAE 62.2 and CALGreen