SL-440
4” standard Louver
4″ Deep high performance series; 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 an air performance and water penetration maintained effectiveness rate tested in accordance with AMCA 500-L.
AIRFLOW PERFORMANCE
Free Area: 57%, based on a test sample of 48in (1219.2mm) x 48in (1219.2mm)
Free Area Velocity at Beginning Point of Water Penetration: 879 fpm (4.47 m/s)
Air Volume Flow Rate at Beginning Point of Water Penetration: 7,956 cfm (3.75 m3/s)
Pressure Drop at Beginning Point of Water Penetration: 0.12 in. H2O (30 Pa)
Pressure Drop at 1000 fpm Free Area Velocity: 0.15 in. H2O (37 Pa)
Airflow Classification—Class 2
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