Model "FL" Extruded Vent
With Exterior Key Flap Damper


Model "Fl" ventilator
(1 1/2" Deep with 1" Face Flange)


Extruded alumnium to be 6063-T5 Alloy. Minimum .125" Thick.
Blades are 1" deep, set at 45° angles, 1" on center.
For any unit over 30" wide- do not mortar jamb sections.