638-CD Combination Drainable and Adjustable Louver

638-CD Combination Drainable and Adjustable Louver

MADE TO ORDER - Lead Time 2-3 weeks

Custom Sizes Available

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The 638-CD combination drainable and adjustable louver is designed to prevent water penetration in
building exterior walls for non-wind-driven rain applications. Water is channeled away from the face
of the louver via built-in drain gutters into vertical downspouts that allow the water to drain at the
sloped sill. The louver utilizes a built-in adjustable control damper to allow for airflow shutoff for
intake and exhaust applications. The 638-CD is an AMCA-certified louver.

Specifications:

STANDARD CONSTRUCTION:
Material: Mill finish 6063-T5 extruded aluminum
Frame: Heavy gauge 6” deep x .081” thick
Blade: 38° drainable .081” thick – spaced 4.75” apart
Bird Screen: Expanded metal

SIZES:
Minimum: 12” W x 12” H
Single-Section Maximum: 72” W x 120” H

FRAME STYLES:
Standard: Flush Box – No Flange
Optional: Bottom Flange Only or Full Perimeter Flange

OPTIONS:
Insect Screen: Front
Mounting Sleeves: 8”, 10”, 12”, 14”, or 16”

PERFORMANCE FEATURES:
59% Free Area
Published performance ratings based on testing in accordance with AMCA Standard 500-L
Beginning Point of Water Penetration:
 Free Area Velocity: 800 fpm (4.06 m/s)
 Air Volume Delivered: 7,264 cfm (3.43 m³/s)