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Pottorff > Louvers and Penthouses > Louvers and Penthouses > Combination > EXD-437

Model EXD-437

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

The EXD-437 combination louver features stationary drainable blades to protect against water penetration and an integral control damper to allow positive shutoff protection of air intake and exhaust openings. The EXD-437 is available in a wide array of anodized and painted finishes including custom color matching. These units are also available with a variety of factory mounted electric and pneumatic actuators.


EXD-437 4" Deep - 37-1/2 Combination Blade

Standard Construction

Material: Mill finish 6063-T5 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.

Axles: 1/2" (13) diameter steel hex.

Linkage: Concealed in frame.

Low Leakage Seals: TPV blade edge and flexible metal jamb.

Bearings: Synthetic.

Minimum Size: 12" x 12" (305 x 305)

Maximum Size:
Simgle Section: 48" x 96" (1219 x 2438) with low leakage seals or 60" x 96" (1524 x 2436) without low leakage seals.
Multiple Section: Unlimited



Free Area: 6.9 ft2 (0.64 m2)


Performance @ Beginning Point of Water Penetration

Free Area Velocity: 1172 fpm (5.95 m/s)

Air Volume Delivered: 8134 cfm (3.84 m3/s)

Pressure Loss: 0.17 in. wg. (42 Pa)


Velocity @ 0.15 in. wg. Pressure Loss: 1085 fpm (5.51 m/s)

Design Load: 30 psf

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