This Standard sets out requirements for the design, installation and commissioning of drencher systems intended to provide automatic external protection to windows, doors and other openings from exposure to fire.

Drencher systems may be either internal or external; however, this Standard covers external protection of fire exposed building facades only, including the bounding walls of an atrium or where egress paths pass unprotected openings in the building. Radiant heat flux levels are not considered in this Standard.

Where a fire exposed building is protected by an automatic sprinkler system in accordance with AS 2118.1, protection from a fire source may be achieved by external sprinklers fed from that system.