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medium capacity 1 way vent cna

SKU: 157065


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  • 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