●产品特征：
18 In.H 18 In.W Drnbl Extrd Alu Intake Louver Louver Type Stationary Blade Frame Type Hat Channel Frame Depth 4 in Mounting Style Recess Mount Outside Height 17 1/2 in Outside Width 17 1/2 in Rough Opening Height 18 in Rough Opening Width 18 in Louver Maximum Intake 744 cfm Maximum Exhaust 1 063 cfm Maximum Outside Width 17 1/2 in Minimum Outside Width 17 1/2 in Flange Width Not Applicable Free Area 0.9 sq ft Beginning Point of Water Penetration 1 031 fpm

●用途:
For Use With:Intake or Exhaust Applications
Inside Height (In.):12 in
Intake Louver Inside Width:15 in
Intake Louver Outside Height:17 1/2 in
Item:Intake Louver
Louver Free Area:0.885 sq ft
Louver Material:Aluminum
Outside Width (In.):17 1/2 in
Blade Angle (Deg.):45
Flange Width (In.):1 1/4 in
Includes:Bird Screen and Screen Fastene
Louver Item:Stationary Intake Louver
Louver Max. Exhaust:1
Louver Max. Intake:744 cfm
Louver Type:Drainable
Max. Velocity (FPM):3
Min. Wall Opening (In.):18H x 18W
Number of Blades:3