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Severe-duty aluminum tornado louver for FEMA 361/320 storm shelters and safe rooms. Tested to ICC 500-20 and UL Listed; available in multiple installation configurations, often paired with a high-performance wind-driven rain louver..

• 5 1/2-inch depth
• 50% free area (4 ft. x 4 ft.)

All-in-one FEMA dual-module louver with horizontal front and vertical rear blades for storm shelters and safe rooms. UL Listed; tested to ICC 500 (2020/2023). AMCA 540 & 550 Listed with Class A wind driven rain. Patent pending.

• 6-inch depth
• 43.6% free area (4 ft. x 4 ft.)
• 1,250 fpm free area velocity at the beginning point of water penetration