Exhaust Fans → Industrial Exhaust Fans → Model ADBE-04 Safe-Air Dowco brand 4" Deep (Adjustable Blade) Fresh Air Drainable Wall Louver - 1,016 (FPM) Feet Per Minute Free Air Velocity Rating (Beginning Point of Water Penetration) Sizes 12" to 96" - Custom Sizes Available
Model ADBE-04 Safe-Air Dowco brand 4" Deep (Adjustable Blade) Fresh Air Drainable Wall Louver - 1,016 (FPM) Feet Per Minute Free Air Velocity Rating (Beginning Point of Water Penetration) Sizes 12" to 96" - Custom Sizes Available