Abstract: A safety system and method of an air distribution system having an air storage sub-system is disclosed. In one embodiment, the air distribution includes a supply unit of a building structure to facilitate delivery of breathable air from a source of compressed air to an air distribution system of the building structure, a valve to prevent leakage of the breathable air from the air distribution system potentially leading to loss of system pressure, a fill station interior to the building structure to provide the breathable air to a breathable air apparatus at multiple locations of the building structure, a secure chamber of the fill station as a safety shield that confines a possible rupture of an over-pressurized breathable air apparatus within the secure chamber, a distribution structure, and an air storage sub-system to provide an additional supply of air to the building structure in addition to the source of compressed air.