This page provides additional technical information to enable fire industry and construction professionals to assess and select Automist for solving fire building regulation issues in open plan kitchen, loft conversions and staircases.

Automist is covered by (RD171) an LABC Registered Detail for use in open plan layouts in loft converted houses. This Registered Detail scheme permits building control officers to approve plans without a long and detailed investigation.

Automist aims to control and suppress fires, significantly reducing the risk of injury, damage to property and loss of life. It’s purpose is to maintain survivable conditions for a prolonged period while dwellers evacuate. This is achieved in several ways:

– Reduction of room temperature in the region of the fire. Water mist devices achieve this by consuming much of the fire’s energy in converting water to steam.

– A decrease of toxic gases and smoke. Water mist produces of liberal amounts of inactive steam in the close vicinity of the fire, locally excluding oxygen, dropping the temperature to slow the oxidation reactions of the fire.

– Flashover prevention. By limiting room temperatures to 100°C or less, flashover is prevented.

– Providing cooling to structural elements of the home that are in the path of the spray, allowing longer resistance from the fire.

– Automist can provide a more reliable safety measure than traditional fire doors, which Approved Document B now allows not to be equipped with closers.

The Building Research Establishment (BRE), certified the effectiveness of Automist in a series of scenarios. Tests were based on BS EN 1869:1997, DD 8458 1:2010, and to the criteria of Scandinavian SRSA/DSB “Easily installed automatic extinguishing systems”. Critically, Fractional Effective Dosage (FED) measurements and “free burn” control tests were included to ensure a complete and objective assessment. These tests were run in BRE Global’s Watford (UK) Burn Hall and mimicked both furniture and kitchen fires.

In every test where a “free burn” unsuppressed reference was available, the system produced an improvement in both temperature and asphyxiant gas conditions, whilst reducing damage. Automist was found to render lethal environments survivable. In a major furniture fire, even those immobilised in the room could have survived for the entire test period of 30 minutes.

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