HIGH-QUALITY FAN: Quiet, ENERGY STAR certified exhaust fan operates with 110 CFM and 1.0 Sones to help control air quality is powerful enough for rooms (including bathroom) up to 105 sq. ft. EFFICIENT: Powerful ventilation removes in most full baths at 110 CFM, so 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, 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 THREE YEAR LIMITED WARRANTY: Backed by a three year limited warranty for your convenience