Go to Forum Home Building Design AAVs and Airtightness

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    • #31874

      Hi all,

      A quick question about using Air Admittance Valves (Durgos) in a Passivhaus. (Note that the drain will be ventilated with an external open vent at the end of the run.)

      Are there any implications for airtightness and airtightness tests? I can't find information on the opening pressure apart from one test document which seemed to suggest it was sixty-something Pa. Can/should I seal AAVs during testing?

      Thanks in advance,


    • #39151
      Nick Grant

      We seal them and also make sure traps have water in.


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