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Pottorff > Louvers and Penthouses > Louvers and Architectural > Drainable > EFD-437-FL

Model EFD-437-FL

Extruded Aluminum Louver
4" Deep - 37-1/2 Degree Drainable Blade

The EFD-437-FL louver is designed to prevent water penetration in non-wind-driven rain applications by collecting water in frame and blade gutters and channeling it into downspouts and away from airflow paths. The design is engineered and tested to withstand extreme loads, debris impact, and cyclic fatigue associated with the severe weather effects of hurricanes (Florida Building Code approval No. FL32498). The EFD-437-FL is AMCA 540 listed, making it ideally suited for use in hurricane-prone and windborne debris regions as per the International Building Code. In addition, the EFD-437-FL is a UL Classified Windstorm Rated Assembly with design pressures up to 250 psf (depending on section size).

EFD-437-FL 4" Deep - 37-1/2 Degree Drainable Blade

Standard Construction

Material: Mill finish 6063 extruded aluminum.

Frames: 4" deep x 0.081" thick (102 x 2) channel.

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

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

Mullion: Visible.

Minimum Size: 12" x 12" (305 x 305)

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


Free Area: 8.9 ft2 (0.82 m2)


Performance @ Beginning Point of Water Penetration

Free Area Velocity: 1029 fpm (5.23 m/s)

Air Volume Delivered: 9105 cfm (4.30 m3/s)

Pressure Loss: 0.16 in. wg. (39 Pa)


Velocity @ 0.15 in. wg. Pressure Loss: 1012 fpm (5.14 m/s)

Design Load: Up to 250 psf (12.0 kPa), depending on section size

Florida Building Code Approval (2020-FBC): No. FL32498
AMCA 540 Listed: (impact resistance, Basic protection)
AMCA Certified for Water Penetration and Air Performance

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