SP-645 Step Blade
4″ Deep High Performance Step Blade 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
WATER PENETRATION PERFORMANCE Free Area Velocity at Beginning Point of Water Penetration: 740 fpm (3.76 m/s) Air Volume Flow Rate at Beginning Point of Water Penetration — 48in (1220mm) x 48in (1220mm) unit: 5,903.6 cfm (2.79 m3/s)AIRFLOW PERFORMANCE
Free Area: 51% , based on a test sample of 48in (1220mm) x 48in (1220mm) Airflow Classification—Class 2
HP-445 High Performance
HP-445D High Performance with Drainable Head
S-445 Standard Blade
S-450 Standard Blade
S-645 Standard Blade
SP-430 Step Blade
SP-445 Step Blade
SP-645 Step Blade
SP-645HD Step Blade