The Broan® ZB110 ULTRA GREEN™ Multi-Speed Ceiling Bath Fan gives a premium performance for today's demanding home ventilation requirements. 110 CFM quickly reduce humidity and manage moisture in bathrooms up to 105 sq. ft. ULTRASilent™ technology operates at the lowest sound rating achievable, less than 0.3 sones. The ULTRASmart DC motor and control technology provides energy efficiency almost 10 times greater than ENERGY STAR® requirements. With ULTRAQuick™ installation technology the ZB110 provides the fastest, easiest, and most universal installation in remodel, retrofit, and new construction. The Broan® ZB110 has been specifically designed to meet both spot and continuous ventilation needs for various building codes and green building standards. Features: 110 CFM, Effective ventilation to remove moisture and reduce the risk of mold or mildew in most full baths; <0.3 Sones for Ultra quiet performance, you might not notice it's on; ULTRAQuick™ Installation Technology uses an exclusive telescoping mounting frame with pre-installed screws; Snap-in housing, snap-in blower, and an inside-out mounting duct connector for the fastest, easiest, most universal installation; Mounting Frame fits any type of joist, I-Joist or truss construction for a \"no guesswork\" installation to make the work fast and easy; ENERGY STAR® Certified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings; UL listed for use over bathtubs and showers when connected to a GFCI protected branch circuit (ceiling mount only) and for use in insulated ceilings (type IC); Title 24 compliant; Powerful enough for rooms up to 100 sq. ft.; Brighter white grilles blend in to match most common ceiling paint; Corrosion resistant galvanized steel housing stands up to moisture; Brushless DC electronically controlled digital motor is 3Xmore efficient than standard AC powered ventilation; Very quiet, energy efficient , multi-speed exhaust fan; Powerful enough for rooms (including bathroom) up to 105 sq. ft.; Easy to install and/or replace existing product for DIY'ers