Broan QTXE110SFLT Ultra Silent Humidity Sensing Fan and Light, 110 CFM, White Grille 6" ducting for superior performance 0.7 Sones, 110 CFM Sensaire technology detects the rapid rise in humidity over time Auto shut-off time is adjustable from 5 to 60 minutes Humidity is sensed at the ceiling where it is most prevalent 110 CFM and nearly silent operation 0.7 Sones; Fan/Light/Nightlight, White Grille, Title 24 Compliant, Energy Star Qualified Sensaire technology detects the rapid rise in humidity over time Helps prevent lingering, excessive humidity which can cause mold and humidity is sensed at the ceiling where it is most prevalent Auto shut-off time is adjustable from 5 to 60 minutes Bright 42-Watt fluorescent lighting  bulb included and 4-Watt nightlight - bulb sold separately