NFPA 99, Proposal to limit Oxygen on Upper floors

  • Wednesday, October 12, 2022 1:39 PM
    Message # 12951903

    Disclaimer: Do not kill the asking Engineer for being curious.


    I have heard rumors that there is a proposal out there for NFPA to limit the amount of Oxidizing gases to 20,000 cu ft. above 5th floor of a hospital. I'm curious why this is a thing when we have precautions in place such as ZVB's, fire sprinklers, etc.  Also, what's the magic in that number?



  • Tuesday, November 22, 2022 2:00 PM
    Reply # 12998951 on 12951903

    Based on the last meeting notes, this was removed from the next addition of NFPA 99. The final document is not yet complete, but it does appear that this was removed.

  • Wednesday, December 21, 2022 10:56 AM
    Reply # 13032288 on 12951903

    The MAQ levels for oxidizers in the hospital by the UFC is being aggressively pushed on a couple of large hospital projects out here on the West Coast. The definition in the UFC for "storage" vs. "in use" does NOT exist in the UFC. NFPA 99 definition of "storage" is still the same and allows for a larger amount of volume of oxidizers in the upper floors of the facility.


    The CFC (UFC) has gained the attention of the Facilities stakeholders and the clinical stakeholders are pushing back with little success.


    My opinion:  Fire First Responder Safety TRUMPS Daily clinical patient safety within the new hospital projects.


    CFC = California Fire Code

    UFC = Uniform Fire Code

  • Thursday, March 27, 2025 5:28 PM
    Reply # 13479975 on 12951903

     Great News!

    July 2024: The California Fire Code now has an exclusion from their MAQ requirements for storage of oxidizer medical gases to be consistent with NFPA 99 definition.


    Simply, if the oxygen, medical air or Nitrous Oxide cylinder is in an attached cylinder holder to a bed, a gurney, a wheelchair, a portable transport isolette or an E cylinder cart used for oxygen dependent patients walking on the Nursing Unit then these cylinders are NOT to be counted as part of the 300 SCF limit for remote medical gas storage in a Nursing Unit.

    This is consistent with NFPA 99.


    Here is the excerpt from the UCDMC Fire Marshal's Office:


    The 2012 edition of NFPA 99 specifies in section 11.3.3.3 that when small-size (A, B, D, or E) cylinders are in use, they shall be attached to a cylinder stand or to medical equipment designed to receive and hold compressed gas cylinders.


    Section 11.3.3.4 further states that individual small-size (A, B, D, or E) cylinders available for immediate use in patient care areas shall not be considered to be in storage.

    CFC became consistent with NFPA 99 with the July 2024 Supplement by including the following exception in section 5003.1.1 as follows:


    Exception: Medical gases utilized for patient care within patient areas of a Group I-2 occupancy (AKA Hospital, Category 1 Medical Gas System) when the applicable requirements of NFPA 99 chapter 5 and Chapter 11 have been met. Medical gases meeting this exception are not included when determining maximum allowable quantities in storage.

    Finally, in my opinion, calmer heads focused correctly on a safe Environment of Care prevaled.


    Historically, NFPA 99 has always superseded the Fire Code on this issue and it does again.


    Carsten H. Lunde
    President  |  RRT, CMGV, ASSE 6010, 6020, 6030 & 6050
    carsten@cyame.com

    mobile: 510 520.6605 | 24/7: 1.800.292.6334 | fax: 510.659.9019


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