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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5 additions to your control panel (which aren’t as expensive as you think)

You’ve installed our smoke/daily vent control panels, but did you know you can add on some features at little extra expense?

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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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How does a smoke shaft system work?

‘Smoke shaft’ is the common term for ventilation systems in the lobbies of tall buildings, used to maintain tenable conditions in the common escape routes in the event of a fire in the building.

They are essentially a simple ventilation system designed to extract any smoke leaking into a common lobby to protect the escape stairs. Typically, a vertical builder’s work duct rising through the building would be used to extract smoke from the lobbies. Each lobby would have a damper connected to the builder’s work duct.

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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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