Suited for a wide variety of indoor environments including schools, hospitals, offices, shops and other commercial settings. Constructed of 20swg mild steel with horizontal louvres set at an 8.5mm pitch with a 30% downward directional deflection. 

A suitable selection for both door and wall installation. Self-tapping screws are included for flange screw fixing. Steel construction meets requirements for standard air transfer applications, with or without a fire grille. 

A vast range of 55 sizes from 100mm x 100mm up to 600mm x 600mm. NHBC type approval.