1. Enclosures such as 1-hour interior and exterior rooms (detailed below) must be provided for supply systems cylinder storage or manifold locations for oxidizing agents such as oxygen and nitrous oxide. Such enclosures must be constructed of an assembly of building materials with a fire-resistive rating of at least 1 hour and must not communicate directly with anesthetizing locations.
CCR, Title, 8, Section 4650(d)
NFPA 99, Sections 4-3.1.1.2(a).2
Other nonflammable (inert) medical gases may be stored in the enclosure. Flammable gases shall not be stored with oxidizing agents. Storage of full or empty cylinders is permitted. Such enclosures shall serve no other purpose.
2. A 1-hour exterior room shall be a room or enclosure separated from the rest of the building by not less than 1-hour-rated fire-resistive construction. Openings between the room or enclosure and interior spaces shall be smoke-and draft-control assemblies having no less than a 1-hour fire-protection rating. Rooms shall have at least one exterior wall provided with at least two vents. Each vent shall not be less than 36 square inches in area. One vent shall be within 6 inches of the floor and one shall be within 6 inches of the ceiling. Containers of medical gases shall be provided with at least one fire sprinkler to provide container cooling in case of fire.
CCR, Title 24, Part 9, Section 7404.2.1.2
3. When an exterior wall cannot be provided for the room, automatic sprinklers shall be installed within the room. The room shall be exhausted through a duct to the exterior. Makeup air to the room shall be taken from the exterior. Both separate air streams shall be enclosed in a 1-hour-rated shaft enclosure from the room to the exterior. Approved mechanical ventilation shall be in accordance with the California Mechanical Code and provided at a minimum rate of 1 cubic foot per minute per square foot of the room area.
CCR, Title 24, Part 9, Section 7404.2.1.3
CCR, Title 24, Part 9, Section 7404.2.1.3
4. Medical gas system cabinets shall be in accordance with the following:
a. Operated at a negative pressure in relation to surrounding area,
b. Provided with self-closing, limited-access ports or noncombustible windows to give access to equipment controls. The average velocity of ventilation at the face of access ports or windows shall not be less than 200 feet per minute, with a minimum of 150 feet per minute at any point of the access port or window,
c. Connected to an exhaust system,
d. Provided with a self-closing door,
e. Constructed of not less than 0.097-inch (12 gauge) steel, and
f. Internally sprinklered.
CCR, Title 24, Part 9, Section 7404.2.1.4
