Exhaust Fans → Industrial Exhaust Fans → Model DDBE-04 Safe-Air Dowco brand 4" Deep (Fixed Blade) Fresh Air Drainable Wall Louver - 1,000 (FPM) Feet Per Minute Free Air Velocity Rating (Beginning Point of Water Penetration) Sizes 12" to 84" - Custom Sizes Available
Model DDBE-04 Safe-Air Dowco brand 4" Deep (Fixed Blade) Fresh Air Drainable Wall Louver - 1,000 (FPM) Feet Per Minute Free Air Velocity Rating (Beginning Point of Water Penetration) Sizes 12" to 84" - Custom Sizes Available