Broan A50L Invent Single-Speed Ventilation Fan with Incandescent Light, 50 CFM 1.5 Sones 50 CFM reduces humidity to quickly eliminate fogged mirrors and manage moisture in bathrooms up to 45 square feet, so your vision will always be clear and your surroundings will always be comfortable Retrofit installations can be done entirely from the room-side - no attic access required and this means a faster, Easier installation, so you can move on to something else With our true seal 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 back drafts connector can be installed room-side with no attic access required, Fan housing connection have never been Easier 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 locating your Fan exactly where you need it the most