The Colt Extended Corridor System (corridor ventilation system) is a smoke and heat exhaust shaft ventilation system designed for means-of-escape corridors in residential buildings. This system offers developers substantial space and cost saving benefits, while providing a safe evacuation route. It is designed to complement the ColtShaft mechanical shaft system.
This CFD diagram shows visibility in the corridor. Red denotes the greatest visibility distance; blue shows the least visibility distance. Just 30 seconds after the apartment door closes, the Extended Corridor System is well on its way to clearing the corridor.
Despite the fact that the corridor is more than twice the length of the compliant corridor, the corridor is almost completely cleared of smoke within 60 seconds of the apartment door closing.
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 that 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 – much smaller compared to alternative solutions.
The Colt 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.
There are four types of Extended Corridor System:
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