Dampers, Shutters and Louvers → Model GFL Soler & Palau USA brand 4" Wide (Fixed Blade) Fresh Air Architectural Steel Wall Louver - 709 (FPM) Feet Per Minute Free Air Velocity Rating (Beginning Point of Water Penetration)
Model GFL Soler & Palau USA brand 4" Wide (Fixed Blade) Fresh Air Architectural Steel Wall Louver - 709 (FPM) Feet Per Minute Free Air Velocity Rating (Beginning Point of Water Penetration)