What is an AOV Kit and why do I need one?

Here at Easivent we wanted to make it easier for you to get your job done. So, we put together a range of AOV Kits which provide a solution for just about any smoke ventilation requirement in a building.

Easivent’s Kits are designed for self-installation and meet the requirements of Approved Document B of the Building Regulations. The Kits can be installed as either stand-alone systems or be inter-connected to form modular "smoke shaft" systems without the need of additional interfaces or software. 

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Reduce the risk with Easivent’s new compliant AOV Kits

It’s the responsibility of installers to ensure their systems are complaint. This risk can be reduced by ensuring the products they use are certified and compliant.

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Which stairwell ventilator can I use on my roof?

What is a stairwell AOV?

A stairwell AOV is an automatic opening ventilator (AOV) which provides at least 1.0m² of free area when open.

The installation is always located at the highest point in an evacuation stairwell and can take a number of forms.

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What actuator do I need for my window?

Stairwell ventilation can be achieved by automatically opening a window within the stairwell. As always this is subject to the minimum free area being achieved when calculated using the method in diagram C7 of Approved Document B.

It is recommended that bottom hinged outward opening windows are selected for efficient smoke evacuation, however this is not a requirement of ADB. Stairwell ventilators are more commonly used for replacing fresh air in a lobby extract system.

A variety of actuators are available for different window types depending on what the required free area is.

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What type of stairwell smoke ventilator can I use?

A stairwell smoke ventilator is an AOV which provides at least 1.0m2 of free area when open. It usually serves one of two purposes;

  • to evacuate any smoke that gets in the stairwell of small buildings,
  • or, more commonly, it provides replacement air for a lobby smoke extract system in large buildings.

The most common product types of stairwell ventilators are illustrated below.

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Using a stairwell smoke ventilator (AOV) for roof access

A stairwell smoke ventilator is an automatic opening ventilator (AOV) providing at least 1.0m2 of free area when open. It helps to evacuate any smoke that gets in the stairwell of small buildings, or more commonly it provides replacement air for a lobby smoke extract system in large buildings. 

However, there are other uses for a stairwell AOV:

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What is a stairwell AOV system?

Stairwell automatic opening ventilators (AOV) are used in the stairwells of flats and office buildings where protecting the common escape routes is of paramount importance. 

A stairwell smoke ventilator is an AOV which provides at least 1.0m2 of free area when open. It usually serves one of two purposes;

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5 effective smoke control systems used by M&E contractors

Smoke control systems are installed to ensure stairways and communal corridors remain relatively free from smoke and heat in the event of a fire within a dwelling to enable occupants of the building to escape safely. In tall buildings (with a floor over 18m high) these systems assist firefighters in gaining access to fight the fire from inside the building.

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