Highest Security Guaranteed

Featuring sturdy steel and aluminum construction, our security grilles are designed to provide both optimum ventilation and security.

  • The 5/16” round holes offer a greater free area and maximize the airflow
  • An optional front or rear operated opposed blade damper can be welded to the sleeve
  • Can be utilized for supply and return applications

  • Vents are highly-secured with optional 1/2” diameter aluminum bars
  • 5/16” round holes on 7/16” staggered centers minimize pressure loss for supply and return applications
  • Damper with opposing blades modulate optimum air flow