Model ESJ-401 is an extruded aluminum stationary non-drainable louver that protects air intake and exhaust openings in exterior walls. The design incorporates J-style blades, sloped sill and a hidden vertical mullions when configured as multiple sections wide.

  • 4-inch depth
  • 53% free area (4 ft. x 4 ft.)
  • 691 fpm free area velocity at the beginning point of water penetration

AMCA 500-L Water Penetration and Air Performance

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