At the time of designing a building, one essential and key factor that must be considered is fire safety as it is the real threat to the security and safety of occupants as well as structure of the properties. This is the surprising fact that most of the deaths are caused by smoke inhalation during a fire as this can restrict visibility for the escaping residents as well as attending the fire service.
It can also make it difficult to clear corridors and staircases as soon as possible. Generally, it is the design of the building which is the deciding factor in selecting the most appropriate form of smoke ventilation along with the standard requirements which are varying depending on the height of property and the maximum distance which occupants will have to travel for reaching an exit in the event of fire.
In some cases, the use of natural smoke ventilation systems is the most appropriate solution as it features automatically opening windows and vents in the event of fire and it is normal method of removing smoke.
On the other hand, the mechanical smoke ventilation systems are the alternative solution to natural ventilation in some cases. This system uses powered fans in order to vent the smoke from the building as it consist a mechanical shaft that serves a common corridor or lobby areas. As soon as smoke is detected, the automatic fire dampers to the smoke shaft on the affected floor will open along with vent at the head of the stairway.
Then the fan will engage in order to extract the smoke as well as it also prevents its movements into nearby areas. After that, pressure controlled door closers depressurize the stair area and allows fresh air to be pulled through the lobby. It also prevents the movement of smoke into the stair area and allows the escape of the building’s occupants.
The mechanical smoke ventilation system gives a number of amazing benefits in comparison to the natural counterparts. These systems utilize powered fans which could offer greater efficiency as well as controllability compared to natural systems and rely on natural airflow for removing smoke from the corridor or lobby.
This improved efficiency can be offered by smoke ventilation systems of this type and it allows the use of far smaller smoke shafts in comparison to natural systems as well as provides substantial space.