HIGH-QUALITY FAN COMBO: Quiet, energy efficient exhaust fan and 100-Watt maximum incandescent A19 type bulb or energy efficient equivalent bulb with MOL (maximum overall length) of 4.4" or less combo. Unit helps control air quality is powerful enough for rooms (including bathroom) up to 65 sq. ft. EFFICIENT: Powerful ventilation reduces to quickly eliminate fogged mirrors at 70 CFM and 2.0 Sones so your vision will always be clear and your surroundings will always be comfortable 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: Unit 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 If you are purchasing in Massachusetts we recommend Broan-NuTone AE80BL per state requirements.