Hyperbaric Chambers are addressed within the NFPA 99 standard within Chapter 20. The standards address the many issues a facility may encounter having a hyperbaric chamber on site. Listed below are the standards that address the medical pipe gas system. A few facilities have asked questions pertaining to the master alarm requirements. As per the standard reserve supplies and master alarm signals shall meet the requirements of Section 5.2 (level 2 Piped Gas and Vacuum Systems). These requirements are the same as a level 1 Hospitals except the signals do not need to be duplexed; they allow only one master alarm panel for monitoring purposes. Below lists other requirements that facilities have had questions with. If you would like additional clarification on the standard please do not hesitate to contact Sean P Kolb 1-404-386-8735.

20.1.1 This chapter shall apply to new facilities.
20.1.2 This chapter shall also apply to the altered, renovated or modernized portion of an existing system or individual component
20.1.3 Existing construction or equipment shall be permitted to be continued in use when such use does not constitute a distinct hazard to life.
20.1.5.2* Occupancy.  Hyperbaric chambers shall be classified according to the following criteria:
(1) Class A – Human, multiple occupancy
(2) Class B – Human, single occupancy
(3) Class C – Animal, no human occupancy
20.2.1.1 For Class A chambers located inside a building, the chamber(s) and all ancillary service equipment shall be protected by 2-hour fire-resistant-rated construction.
20.2.1.1.1* Free-standing, dedicated buildings containing only a Class A chamber(s) and ancillary service equipment shall not be required to be protected by 2-hour fire-resistant-rated construction.

20.2.1.1.5* If there are connecting doors through such common walls of contiguity,  they shall be at least B-label, 1 1/2-hour fire doors.
20.2.1.1.7 Servive equipment (e.g. compressors) shall be permitted to be located in multi-use spaces meeting the requirements of 20.2.1.1.
20.2.1.2  A hydraulically calculated automatic wet pipe sprinkler system meeting the requirements of NFPA 13, Standard for the Installation of Sprinkler Systems, shall be installed in the room housing a Class A chamber and in any ancillary equipment rooms.
20.2.1.3 The room or rooms housing Class B and Class C chambers shall be afforded sprinkler protection in accordance with 20.2.1.2.
20.2.1.4.1 Shutoff valves accessible to facility personnel shall be provided for such piping at the point of entry to the room housing the chamber.
20.2.4.2.3 Air supply for chamber atmosphere shall be monitored as required in 20.2.8.6.
20.2.4.2.5.1 Each compressor shall be supplied from separate electrical branch circuits.
20.2.4.3.2* Class A chambers that are not used in the capacity of an operating room shall maintain a temperature that is comfortable for the occupants [usually 22°+/-2°C (75° +/-5°F)].
20.2.5.1.7 Signs prohibiting the introduction of flammable liquids, gases , and other articles not permitted by this chapter into the chamber shall be posted at the chamber entrances(s).
20.3.4.1.3 Before piping systems are initially put into use, it shall be ascertained that the gas delivered at the outlet is shown on the outlet label and that connecting fittings are checked against their labels in accordance with Sections 5.1 through 5.3.
20.3.4.1.4 The requirements set forth in Section 5.1 concerning the storage, location, and special precautions required for compressed gases shall be followed.  Reserve supplies and master alarm signals shall meet the requirements of Section 5.2.
20.3.4.2.1 Installation, repairs, and modifications of equipment related to a chamber shall be evaluated by engineering personnel, tested under pressure, and approved by the safety director.
20.3.4.2.1.1 Logs of all tests shall be maintained.