(a) Unmanned structures housing calorimeters or calorimixers shall be designed so that the egress shall be directly to and from the outside, and all air movements shall be directly to and from the outside atmosphere. All associated devices which may vent gas shall be vented through piping to the outside atmosphere.

(b) Unmanned rooms with such gas burning equipment shall be equipped with sensing devices which provide for both the automatic shutdown of the gas supply to such rooms and the signalling of an alarm at a continuously manned post. All alarms shall be immediately investigated.

(c) Combustible material associated with such gas-burning equipment shall be stored safely, and in a manner which separates them from sources of ignition.