Smoke and heat exhaust shaft ventilation system for means-of-escape corridors in residential buildings.
Approved Document B (Fire safety) recommends that where there is a dead-end corridor, the travel distance from the dwelling door to the staircase is limited to 7.5 metres. The Extended Corridor System allows safe escape conditions to be maintained in the corridor, even when the travel distance is extended by a factor of 2 or 3 in one direction. It is designed for both evacuation and fire-fighting. The system is generally unaffected by external wind pressure.
The system comprises a supply and extract system with shafts at each end of the corridor. Vertical builders' ducts are required at each end of the corridor which will supply fresh air and provide smoke extraction to fans mounted at roof level, providing a smoke dilution system to the fire floor. The ductwork is nominally only 0.6 m² in cross sectional area, enabling a much reduced footprint compared to alternative solutions.
The Extended Corridor System is a LABC Registered System because of its superior performance as proven by CFD and full scale physical testing, witnessed and approved by independent consultants including the London Fire and Emergency Planning Authority.
Features and benefits:
Extended Corridor System
Motorised smoke damper and grille
Seefire ducted termination
Smoke extract fan
Standard product features