ColtShaft Smoke Extract System

ColtShaft comprises of a system of dampers, ventilators and smoke extract fans designed to protect stairs from smoke ingress in residential buildings or fire fighting shafts.

ColtShaft is designed to provide the equivalence to the BRE Shaft and hence meet the recommendations of Building Regulations (E&W) Approved Document B. The ColtShaft ventilation system offers the benefit of a much reduced footprint, providing 20% of the BRE Shaft footprint.

The ColtShaft design has been proven by extensive CFD analysis and full scale physical testing, witnessed and approved by independent consultants including the London Fire and Emergency Planning Authority.

Features and benefits:

• Space saving - ColtShaft requires a shaft with a cross sectional area which can be as small as only 0.6 m² compared with 3 m² for the BRE shaft or 1.5 m² for a natural residential (ADB) shaft. This represents up to 80% reduction in the floor space required. (The builder’s work shaft adjacent to the lobbies is nominally 0.6 m² but needs to be selected based on individual project requirements.)
• Enhanced performance - ColtShaft can perform better than a BRE Shaft since it extracts at a defined rate - this means that it is unaffected by external wind pressures. It is also less susceptible to obstructions to the airflow within the duct. The ColtShaft design has been proven by extensive CFD analysis and by empirical tests.
• ColtShaft comprises of a system of dampers, ventilators and smoke extract fans designed to protect stairs from smoke ingress in residential buildings or fire fighting shafts.