Medical Gas Professional Healthcare Organization

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NFPA 99 Chapter 9 Ventilation

  • Thursday, June 23, 2016 6:59 PM
    Message # 4095293
    Al Moon (Administrator)

    Does the requirement of Chapter 9 apply to all categories (1,2, and 3)? Does it apply even if the category does not refer you back to Chapter 9?



    Last modified: Wednesday, July 20, 2016 12:36 PM | Al Moon (Administrator)
  • Friday, June 24, 2016 1:31 PM
    Reply # 4100601 on 4095293
    Al Moon (Administrator)

    The final consensus is that new for the NFPA 99 2012 Edition, all Categories (1,2,3) shall be installed to meet the requirements for Chapter 9, Ventilation HVAC. I believe that 90% of all Category 3 systems will be a failure in the near future. 

    Last modified: Wednesday, July 20, 2016 12:37 PM | Al Moon (Administrator)
  • Friday, June 24, 2016 5:04 PM
    Reply # 4100872 on 4095293

    Good observation about failures in the future.  Could very well be true.   


    Often, the dental manifold rooms are not ventilated.  It is even more important, since the relief valves often dump in the closet since they cannot be piped outside.


    In my experience, only about 10% of them are ever verified.  Little to no enforcement in most states.



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