Premium Choice Ceiling Mount Ventilation Fan, 4" Duct

Features & Benefits * Buit-in high/low two speed operation with Autoflo Technology *  Low speed runs continuously (Adjustable 0, 30 CFM - Max CFM) *  High speed can be activated through the humidity sensor or a manual high speed over-ride switch *  Built-in Sophisticated humidity sensor that responds to: (a) rapid to moderate increases in humidity or (b) humidity above a user-adjustable setpoint (30%-80% relative humidity). Humidity feature can be disabled *  Polymeric forward curved centrifugal blower. *  26 GA galvanized steel housing construction *  Simplistic and Elegant low profile polymeric grille *  Fixed 20 minute time delay feature * Detachable 4 inch polymeric collar which includes a light weight built in plastic back draft damper *  Built-in overload disconnect for safety and longer motor life *  Totally enclosed brushless DC motor designed for continuous operation