HIGH-QUALITY FAN: Quiet, energy efficient exhaust fan with humidity sensing operates with 80 CFM and 0.8 Sones to help control air quality is powerful enough for rooms (including bathroom) up to 75 sq. ft. EFFICIENT: Powerful ventilation automatically turns on and reduces when raised to a higher level than normal to quickly eliminate fogged mirrors at 80 CFM, so your vision will always be clear and your surroundings will always be comfortable. Sensaire humidity sensing technology, senses humidity up to 4X faster than the competition EASY INSTALLATION: Easy to install new/replace existing product with retrofit installations that can be done entirely from the room-side – no attic access required RELIABLE PERFORMANCE: With our TrueSeal Damper Technology, InVent fans reduce air leakage by up to 50% compared to competitive models, resulting in better home performance via blower door tests and reducing cold and warm air backdrafts GREAT FOR BATHROOM: This ENERGY STAR certified vent fan is UL Listed for use over tubs and showers, with a GFCI circuit so you can capture the steam before it spreads throughout the room by placing your fan exactly where you need it the most