Greenheck Introduces AFL-601 Wind-Driven Rain FEMA Louver

This louver delivers superior weather resistance, and is the first wind-driven rain FEMA louver to be listed for AMCA 550 High-Velocity Wind-Driven Rain.

Article content provided by Greenheck.

Greenheck’s line of FEMA 361 tornado louvers has expanded with the addition of model AFL-601, the first wind-driven rain 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. Learn more here.

Visit the Greenheck website.

Have a question for Greenheck? Contact Greenheck here.

Greenheck manufactures commercial, institutional and industrial products including fans and ventilators, centrifugal and vane axial fans, laboratory exhaust systems, energy recovery ventilators, make-up air, dampers, and louvers.


Jun 27, 2024 Products & Services Update

Latest Articles


Mental Health Matters For Your Employees

Aug 25, 2026 - As a business owner and leader, taking the mental health of your employees seriously and understanding how it can impact their work is essential.


Cut Faster, Feed Smarter, Fabricate Without Limits

Aug 25, 2026 - The Lockformer Vulcan Fiber Laser Elite Cutting System and Iowa Precision Coil Feed NEO combine into one automated, coil-fed cutting system built for faster, safer, more precise HVAC fabrication.


Train Smarter with Insulation Intel®

Aug 25, 2026 - Free online training built for sheet metal and HVAC pros to improve installation quality, efficiency, and workforce skills—available anytime, anywhere.