Cast Aluminum Vent
With Exterior Key Flap Damper


Model "c"
(4" Deep)
 - Minimum .125" thick, with mullions at 8" center on face.


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.