Greenheck Introduces AFL-601 Wind-Driven Rain FEMA Louver

April, 2024

Greenheck’s line of FEMA 361 tornado louvers has expanded with the addition of model AFL-601, the first wind-driven Greenheck FEMA 361 Tornado Louvers - Model AFL-601rain FEMA louver to be listed for AMCA 550 High-Velocity Wind-Driven Rain. Constructed of extruded aluminum with a 6-inch frame depth, the unit’s dual module design incorporates front chevron blades with rear vertical rain-resistant blades for superior weather resistance. In addition to AMCA 550, the AFL-601 is listed for AMCA 540 (Test Method for Louvers Impacted by Wind Borne Debris), Certified for AMCA 500-L Wind-Driven Rain, Water Penetration, and Airflow Performance, and boasts 43.6% free area (4 ft. x 4 ft.)--the highest in its class. AFL-601 is a UL Classified Wind-Storm Rated Assembly passing the stringent ICC 500 test standards for both structural and debris impact criteria in accordance with FEMA Guidelines P-320 and P-361. Model AFL-601 is ideal for FEMA tornado safe rooms, storm shelters, and applications in the Hurricane-Prone Region or any location where maximum protection against wind-driven rain is necessary. Louver model AFL-601 is patent pending.


For more information on Greenheck’s AFL-601 louver, visit:


About Greenheck
Greenheck is a global leader in engineering and manufacturing air movement, control, conditioning, and distribution equipment. For more than 75 years, we have been committed to promoting the highest levels of indoor air quality by offering the widest range of ventilation products for commercial and institutional buildings. Through superior customer service, we continue our legacy of innovation as experts in air movement by connecting our mechanical representative partners and customers with the newest products. With our CAPS® product selection tool and HVAC University product education series, Greenheck offers technology and product knowledge to ensure that when you work with us, you are working with the easiest company to do business with.

To learn more, visit or contact Greenheck, P.O. Box 410, Schofield, WI 54476-0410, (715) 359-6171, FAX (715) 355-2399.