If you only remember to turn on the fan after you"ve stepped into the shower, or if the kids can"t be trusted to remember at all, this QTXE110S Ultra Silent humidity-sensing fan from Broan offers a convenient solution. It also works well for busy families that need to leave the house before all the humidity is properly vented. Equipped with Broan"s exclusive Sensaire technology, the fan detects when steam and humidity levels quickly increase at the ceiling, then it turns on automatically to help return the room to normal humidity levels, which in turn helps prevent mold and other cosmetic and structural problems associated with excess moisture. Even more, it turns off automatically when the job is done (auto shut-off time is adjustable from 5 to 60 minutes). Sensitivity and run-time controls located beneath the drop-down grille can be easily adjusted as needed with a screwdriver, or override the sensor anytime with the touch of a switch. Other details include 110 CFM, nearly silent operation at 0.7 Sones, Energy Star qualified, hanger bars for easy universal installation (fits 2-inch-by-8-inch construction), 6-inch ducting, and UL listed for use over bathtubs and showers (when connected to a GFCI protected branch circuit). Ideal for high-traffic bathrooms or a kid"s bathroom, the Ultra Silent humidity-sensing fan"s housing measures 10-1/2 inches long by 11-3/8 inches wide by 7-5/8 inches high, and its grille measures 13 inches long by 13-3/4 inches wide. Broan covers the unit with a three-year limited warranty. From its humble beginnings in the 1930s, starting with one man"s kitchen fan and another"s melodious door chime, two companies emerged and subsequently joined forces to create one powerhouse company, Broan-NuTone--headquartered in Wisconsin and serving a global market. As North America"s leading producer of residential ventilation products, Broan-NuTone provides high-quality range hoods, ventilation fans, and indoor air-quality products. The company"s collection also includes chimes, central vacuums, intercom systems, medicine cabinets, built-in electric heaters, whole-house fans, attic ventilators, paddle fans, ironing centers, trash compactors, and speakers. Even more, Broan-NuTone manufactures private-label products for GE, Sears, Whirlpool, and other appliance leaders. Their revolutionary products continue to offer value, reliability, and exceptional convenience for homeowners.