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Louver Damper Adjustable 18H x 24W
20.5 In.H 26.5 In.W Drnbl Extrd Alu Combo Dmpr Louver Type Combination Frame Type Flanged Outside Height 17 1/2 in Outside Width 23 1/2 in Rough Opening Height 18 in Rough Opening Width 24 in Louver Maximum Intake 1 090 cfm Maximum Exhaust 1 559 cfm Flange Width 1 1/2 in Free Area 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 16 1/2 in Inside Width 21 3/4 in Number of Blades 3
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20.5 In.H 26.5 In.W Drnbl Extrd Alu Combo Dmpr Louver Type Combination Frame Type Flanged Outside Height 17 1/2 in Outside Width 23 1/2 in Rough Opening Height 18 in Rough Opening Width 24 in Louver Maximum Intake 1 090 cfm Maximum Exhaust 1 559 cfm Flange Width 1 1/2 in Free Area 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 16 1/2 in Inside Width 21 3/4 in Number of Blades 3
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