Application
Vent Cap
Diameter (inch)
4
- The outer wall is constructed of galvanized steel, .018" thick G-90 for sizes 3" to 14" diameter, and .024" thick G-90 for sizes 16" to 30" diameter
- The inner wall is constructed of aluminum alloy, .012" thick for sizes 3" to 8" diameter and .018" thick for sizes 10" to 30" diameter.
- The vent includes an integral, annular insulating air space, ¼" thick for sizes 3" to 6" diameter and ½" thick for sizes 7" to 30" diameter.