Smoke Ventilation

Do You Need a
Smoke Control System?

The benefits of smoke control systems in buildings are well proven and for that reason they have become a legal requirement in certain types of buildings, in particular, for multiple occupancy residential developments – i.e. a block of apartments. In these cases, there must be provision for smoke ventilation in the public corridors and stairwells.

Should the building have a single staircase and is between 4.5m and 11m high but is not connected to a covered carpark, then a simple stairwell ventilator will suffice.

Once the residential building property is over 11m, then a smoke control system is mandatory, the exact requirements of which will depend upon various factors such as the furthest distance of an apartment to the staircase. This should not be more than 4.5m, however this distance can be extended to 7.5m if the corridor is naturally ventilated with an area of at least 1.5m².

Once a building is deemed as being a high-rise residential property, then as well as natural ventilation there may well be a requirement for a mechanical ventilation system as well.

Currently, this legislation applies to new build projects, but it is highly likely that similar requirements will be introduced as part of the fire safety strategy to existing builds, in particular as and when they are refurbished.

The method of calculating the free area for an AOV or smoke ventilation casement window has recently been updated as shown in the diagram above. If you need any assistance on whether you require a smoke control system and if so, what type of system is required, then feel free to contact our team today.



I have always had a great experience with Silver Group, everyone from head office to the engineers, they are always very helpful.

Silver Group are available 24 hours a day and are always helpful, we cannot fault the service. The equipment is very easy to use but, if we do ever need any help, we know they are always there. We would recommend Silver Group to anyone.

Silver Group provide a professional, quick and efficient service. From the initial survey of the property to completion, all engineers and employees were polite, clean and informative. I would recommend that anyone looking for an AOV system speak to Silver Group.

Having used Silver Group for several years on many development projects, they have always been very thorough from design to install. Their advice has certainly saved us a few headaches!

Silver Group understood our needs and designed and installed a system that met those needs in an efficient and friendly manner, a job well done!