MSSL – Minimum Security Straight Louvered Grille

MSSL – Minimum Security Straight Louvered Grille
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MSSL – Minimum Security Straight Louvered Grille


Louvered security grilles features all-welded construction with a heavy-gauge wire screen fixed behind the louver blades for additional security.

Straight Louvers provide straight airflow in medium security applications. The 1/8 in. x 1/2 in. cold rolled steel louvers are set at a 0° deflection with 14 GA vertical support mullions located on 6 in. centers.

Typical Applications
Security grilles reduce unwanted access to ductwork in spaces where supervision is minimal and vandalism or misuse is a risk. Such areas include: correctional facilities, psychiatric hospitals, rest stops, park facilities, schools, and sports venues. Price louvered security grilles feature all-welded construction and integral wall sleeves, ideal for medium security sidewall applications.Construction Options

  • Material
    • Steel
    • Aluminum (minimum security)
    • 304 stainless steel
  • Size
    • Minimum: 6 in. x 6 in.
    • Maximum: 30 in. x 30 in.
  • Options
    • Dampers
    • Barrier bars
    • Transfer grille construction (TGCS)