Nalle Ventilation Fan Ceiling Bathroom Exhaust Fan Extractor Fan (No Attic Access Required) (120 CFM 1.2 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 joistsNo 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