Vevor 20 Inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan With Variable Speed Controller, 3000 Cfm, Ac Motor, Heavy-Duty St

Rapid Venting: This Shutter Exhaust Fan Delivers 3000 Cfm To Quickly Expel Stale Air, Floating Dirt, Heat, And Bad Smells, Keeping Indoor Air Fresh. Also Works As A High-Airflow Exhaust Fan For Sheds And Workshops | Smooth Variable Speed: Stepless Variable-Speed Control Puts Airflow At Your Fingertips. The Included Controller Lets You Dial The Exhaust Fan From A Gentle Breeze To A Powerful Blast To Suit Different Ventilation Needs | Premium Ac Motor: 1480 Rpm And 157W Provide Up To 8.8 M/S Airflow While Running Smoothly With Low Noise, Efficient And Stable For A Quiet, Comfortable Experience. Ideal As An Attic Fan For Year-Round Ventilation | Tough Build: All-Metal Steel Construction Offers High Rigidity, Deformation-Resistant, And Handles Damp And Rain, More Sturdy Than Plastic And Ready For Harsh Weather | Rain Guard: Shutters Open When Powered For Ventilation And Deodorizing, Then Close When Off To Block Rain And Small Things, Reliable Protection For An Attic Exhaust Fan Setup