OSA’S STORM RESISTANT LOUVERS are designed and rated to provide high volume intake and exhaust ventilation and prevent water penetration under the most severe wind-driven rain conditions. Maintains Class A (99%) effectiveness rating when tested for wind driven rain in accordance with AMCA 500-L.

These Louvers are generally used where water penetration and air performance are required but not critical. It has excellent rigidity which helps to minimize wind deflection.


  • Wind Driven Rain is prevalent
  • Keeping rain out of the building is a priority
  • Critical equipment is housed close to the louver system