dl-440
4” drainable Louver
4″ High Performance Drainable; extruded aluminum construction; frame with channel profile; corner joints mitered and mechanically fastened, with continuous recessed caulking channel each side; intermediate mullions matching frame; gutters; rated for air performance and water penetration, maintained effectiveness rate tested in accordance with AMCA 500-L.
AIRFLOW PERFORMANCE
Free Area: 53%, based on a test sample of 48in (1219mm) x 48in (1219mm)
Free Area Velocity at Beginning Point of Water Penetration: 973 fpm (4.94 m/s)
Air Volume at Beginning Point of Water Penetration: 8,239 cfm (3.89 m3/s)
Pressure Drop at Beginning Point of Water Penetration: 0.12 in. H2O (29.6 Pa)
Intake Pressure Drop at 1000fpm Free Area velocity: 0.13 in. H2O (31.4 pa)
Exhaust Pressure Drop at 1000fpm Free Area velocity: 0.15 in H2O (37.3 pa)
Airflow Classification—Class 1
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