The FDS FireSmart Mechanical smoke ventilation system is powered by fans to remove smoke from a building’s common corridor to provide a means of escape for occupants and fire-fighting access in the event of a fire.
ONE
On detection of smoke in the common corridor, smoke detectors will activate the mechanical smoke ventilation system on the affected floor.
TWO
The fire damper to the smoke shaft on the fire floor will open and the vent at the head of the staircase opens and draws fresh air in.
THREE
The duty fan at the top of the smoke shaft extracts the smoke and prevents smoke ingress into the escape stairs.
FOUR
The systems provides greater conditions for means of escape and fire fighting.
Approved Document B: Fire Safety of the Building Regulations provides guidance on choosing the most appropriate smoke control system based on several key factors. This includes the height of the building, internal layout of the property and the distance of each dwelling from the staircase for evacuation.
No restriction to building height.
Utilising shaft sizes between 0.6m2 to 1m, dependant on building requirements, MSVS can be beneficial for saving space on floors to increase saleable space.
Improved efficiency makes them the most appropriate system for buildings featuring extended travel distances beyond Approved Document B requirements.
Where space savings are required or where travel distances exceed 7.5m in an un-sprinklered building and over 15m in a sprinklered building.
An MSVS is more appropriate for buildings subject to wind conditions.
Dual (duty/standby) 3 phase power supply required. The standby supply is commonly provided by a generator.
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MSVS is an engineered solution that satisfies the requirements of BS9999:2017, BS9991:2015, BS7346-8:2013, BSEN12101-8:2011 and the SCA Guidance on Smoke Control to Common Escape Routes in Apartment Buildings.
Shaft Damper Size
The minimum free area for openings into the shaft is job specific, however, BS EN 12101-8 certified dampers are required for use in the shaft.
Computational Fluid Dynamics (CFD) Modelling is a design tool that aids the detailed design of mechanical smoke ventilation systems and is commonly used when applying a fire engineered solution.
Fire Safety in the design management and use of residential buildings
The Building Regulations 2010: Fire Safety Approved Document B Vol 1: Dwellings
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