Medium Capacity 1 Way Vent CNA

Provides pressure equalization in roof system • Low cost, all-metal breather used for venting all types of insulation • Spun from heavy gauge aluminum • An extra wide base opening and security attached cap • An optional foam insert is available to prevent moisture from condensing on the inside of the standpipe • Simple & easy to install • Unique cap design shields against entry of wind-blown rain or snow • Flange may be coated with asphalt priming or PVC This vent is one way and air will only exhaust from roof deck. Made in U.S.A. CNA = Cap Not Attached for ease of installation