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Pottorff > Louvers and Penthouses > Louvers and Penthouses > Hurricane Rated > EFJ-937-MD

Model EFJ-937-MD

Dual-Module Louver
9" Deep - 37 Degree J-Blade with Vertical Rear Section

The EFJ-937-MD dual-module louver is engineered and tested to withstand extreme loads, debris impact, and cyclic fatigue associated with the severe weather effects of hurricanes (Miami-Dade County approval #21-1122.07. The front (exterior) side of the louver features horizontal J-style blades for a pleasing architectural appearance. The back (interior) side has vertical chevron blades which provide superior resistance to wind-driven rain. For installation, the EFJ-937-MD offers multiple options requiring minimal hardware and assembly time. The EFJ-937-MD is AMCA 540 and 550 listed, making it ideally suited for use in hurricane-prone and wind-borne debris regions per the International Building Code.

EFJ-937-MD 9" Deep - 37 Degree J-Blade with Vertical Rear Section

Standard Construction

Material: Mill finish extruded aluminum.

Frames: 6" deep x 0.125" thick (152 x 3) channel.

37o x 0.081" (2.1) thick horizontal J-style.
Rear: 0.060" (1.5) thick vertical chevron

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)
Multiple Section: Unlimited width x 120" (3048)


Free Area: 8.6 ft2 (0.80 m2)


Performance @ Beginning Point of Water Penetration

Free Area Velocity: 1250 fpm (6.35 m/s)

Air Volume Delivered: 10755 cfm (5.09 m3/s)

Pressure Loss: 0.48 in. wg. (121 Pa)


Velocity @ 0.15 in. wg. Pressure Loss: 705 fpm (3.58 m/s)

Design Load: 130 psf

AMCA 540 and 550 Listed
AMCA Certified for Water Penetration, Air Performance and Wind-Driven Rain
Miami-Dade County approved: NOA No. 21-1122.07
Florida Building Code approval (2020-FBC): No. FL27568
Texas Department of Insurance Listed

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