The smoothest-operating bathroom ventilation and lighting systems should, if they're doing their jobs, be unnoticeable, and the NuTone QTREN080FLT Ultra Silent Bathroom Fan / Light / Night-Light - ENERGY STAR is so discreet, you'll notice it's there only when it's time to change the light bulb. Crafted with galvanized steel and a polymeric grille, this unit is outfitted with a permanently lubricated, low RPM plug-in motor engineered for continuous operation. A dynamically balanced blower and .8 sone sound level deliver nearly silent 80 CFM ventilation. Energy-efficient lighting uses two 18W GU24 based fluorescent lamps (included) and a 4W night light (not included).The unit fits a standard four-inch round duct and mounts to joists with easy-to-install four-point hanger bars. Two sets of mounting holes for the hanger bars allow flush installation with the bottom or top of drywall. UL listed for safe use over the bathroom tub or shower with GFCI circuit.DimensionsHousing: 10.5L x 11.37W x 7.62H inchesGrille: 13L x 14W inchesAdditional FeaturesGalvanized steel housing and polymeric grilleLow RPM permanently lubricated plug-in motorDynamically balanced blowerEasy-to-install four-point hanger barsInstalls flush with drywall2 18W GU24 fluorescent lamps includedWhat is an ENERGY STAR product?This product has earned the ENERGY STAR rating from the U.S. Environmental Protection Agency and the U.S. Department of Energy. ENERGY STAR is a voluntary labeling program designed to identify and promote energy-efficient products. These products meet strict guidelines and can help you save up to a third on energy bills compared to like products without an ENERGY STAR rating. ENERGY STAR products saved about $14 billion in 2006 alone, and their numbers are growing exponentially in product categories. This ENERGY STAR product has met criteria that will save energy, money, and reduce greenhouse gas emissions. An excellent choice.About Broan-NuToneBroan-NuTone has been leading the industry since 1932 in producing innovative ventilation products and built-in convenience products, all backed by superior customer service. Today, they're headquartered in Hartford, Wisconsin, employing more than 3200 people in eight countries. They've become North America's largest producer of medicine cabinets, ironing centers, door chimes, and they're the industry leader for range hoods, bath and ventilation fans, and heater/fan/light combination units. They are proud that more than 80 percent of their products sold in the United States are designed and manufactured in the U.S., with U.S. and imported parts. Broan-NuTone is dedicated to providing revolutionary products to improve the indoor environment of your home, in ways that also help preserve the outdoor environment.