Nalle Ventilation Fan Ceiling Bathroom Exhaust Fan Extractor Fan No Attic Access Required 120 CFM 12 Sones Style B

Noted: There are no any Button Control for our products., Bathroom Exhaust Mount Hole SIZE - Please note the size of the housing is 10 x 10 inch, resizing your existing ceiling opening will be needed if your current fan housing is smaller, HIGH-QUALITY VERSATILE FAN： Quiet, energy efficient exhaust fan operates with 110 CFM and 1.2Sones to help control air quality is powerful enough for rooms (including bathroom) up to 105 sq-ft. Duct Diameter 4 inch, INSTALLATION - Torsion springs grille mounting - no tools necessary for a quick and easy installation. Compact housing fits easily between ceiling joists，No Attic Access Required., EFFICIENT: Powerful ventilation reduces to quickly eliminate fogged mirrors at 110 CFM, so your vision will always be clear and your surroundings will always be comfortable, RELIABLE PERFORMANCE: Detachable 4 inch polymeric duct with back draft prevention damper.Nalle Vent 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