Mechanical Smoke Shaft

Mechanical smoke extract systems are utilised in taller buildings and facilitate increased escape travel distances.

Smoke is generally extracted from the communal escape corridor to atmosphere by a fan at roof level via a vertical smoke shaft. Replacement air to equalise pressure is provided via the escape stair, AOV’s are located within the corridors or a mechanical or natural air inlet shaft.

Mechanical systems fall outside of the prescriptive Approved Document B methodology therefore require a fire engineered design produced by a smoke ventilation specialist that possesses the required professional capabilities and design liability insurances.