Sand Louvers

Sand Louvers

Vertical sightproof blades separate sand from the airstream and channels it out via the sloped sill.




Sand louvers are tested per ASHRAE Standard method 52.1 – 1992 (previously ASHRAE Standard 52-76) by a third party independent lab. Model FSL-401 protects air intake and exhaust openings in exterior walls from wind-driven sand. The design incorporates overlapping vertical sightproof blades that aid in collecting and channeling sand out of the airstream to the sloped louver sill.

  • 4-inch depth
  • 27% free area (4 ft. x 4 ft.)
  • 99% sand removal efficiency up to 300 fpm free area intake velocity

AMCA 500-L Air Performance