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Pottorff > Louvers and Penthouses > Louvers and Architectural > Drainable > EFJ-637-HP

Model EFJ-637-HP

Extruded Aluminum Louver
6" Deep - 37-1/2 Degree High Performance J-Blade

The EFJ-637-HP blends the aesthetic appeal of a non-drainable blade with the higher water penetration of a drainable blade louver by incorporating a drainable head member to capture water that cascades down the face of the building and channeling into downspouts and away from the airflow paths. The EFF-637-HP is available in a wide array of anodized and painted finishes including custom color matching.

EFJ-637-HP 6" Deep - 37-1/2 Degree High Performance J-Blade

Standard Construction

Material: Mill finish 6063-T5 extruded aluminum.

Frames: 6" deep x 0.081" thick (152 x 2) channel.

Blades: 37-1/2o x 0.081" (2) thick high performance J-style.

Screen: 1/2" x 0.063" (12.7 x 1.6) expanded and flattened aluminum.

Mullion: Visible.

Minimum Size: 4.5" x 8.5" (114 x 216)

Maximum Size:
Single Section: 60" x 120" (1524 x 3048) or 120" x 60" (3048 x 1524)
Multiple Section: Unlimited


Free Area: 9.0 ft2 (0.84 m2)


Performance @ Beginning Point of Water Penetration

Free Area Velocity: 915 fpm (4.65 m/s)

Air Volume Delivered: 8226 cfm (3.88 m3/s)

Pressure Loss: 0.12 in. wg. (30 Pa)


Velocity @ 0.15 in. wg. Pressure Loss: 1000 fpm (5.1 m/s)

Design Load: 30 psf

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