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Louver Damper Adjustable 24H x 18W
26.5 In.H 20.5 In.W Drnbl Extrd Alu Combo Dmpr Louver Type Combination Frame Type Flanged Outside Height 23 1/2 in Outside Width 17 1/2 in Rough Opening Height 24 in Rough Opening Width 18 in Louver Maximum Intake 1 186 cfm Maximum Exhaust 1 697 cfm Flange Width 1 1/2 in Free Area 1.1 sq ft Beginning Point of Water Penetration 1 118 fpm Maximum Air Velocity 3 000 fpm Blade Angle 45 Degrees Material Aluminum Inside Height 23 1/2 in Inside Width 17 1/2 in Number of Blades 4
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26.5 In.H 20.5 In.W Drnbl Extrd Alu Combo Dmpr Louver Type Combination Frame Type Flanged Outside Height 23 1/2 in Outside Width 17 1/2 in Rough Opening Height 24 in Rough Opening Width 18 in Louver Maximum Intake 1 186 cfm Maximum Exhaust 1 697 cfm Flange Width 1 1/2 in Free Area 1.1 sq ft Beginning Point of Water Penetration 1 118 fpm Maximum Air Velocity 3 000 fpm Blade Angle 45 Degrees Material Aluminum Inside Height 23 1/2 in Inside Width 17 1/2 in Number of Blades 4