Smoke and heat ventilation windows

Natural smoke and heat exhaust ventilators are typically used in common access areas such as stairwells and annex connections as well as in industrial buildings and offices. The smoke ventilation window is activated either automatically by a smoke sensor or manually with a break glass point. Natural ventilation for daily comfort is activated with the integrated switch in the control system or via an auxilliary wall switch.

Smoke ventilation roof window
where a geometric opening area is required

A VELUX smoke ventilation window excluding wind deflector is used when legal requirements for smoke ventilation address only the geometric area.

Smoke ventilation roof window with wind deflectors

Wind deflectors should be used when legal requirements for smoke ventilation address the aerodynamic free area. This may depend on the application and the local legislation.

Excellent energy efficiency

The new high-performance insulation system uses a core of thermally modified timber in combination with a special gasket for a better airtight seal that minimises heat loss and energy consumption. The VELUX smoke ventilation window is also available with triple-glazing for maximum insulation (Only in selected markets. Valid from 1/1/2015).

Same design as other VELUX roof windows

The external design of VELUX smoke ventilation windows matches that of standard VELUX roof windows ensuring a harmonious appearance when installed in the same roof (when wind deflectors are not required).

Tested and certified

VELUX smoke ventilation systems are tested and certified according to EN ISO 12101-2 for roof pitches 15°-90°. Available without wind deflectors where a geometric opening area is required, and with wind deflectors where an aerodynamic area is required. Read more about Declaration of conformity here.

Smoke ventilation for flat roof windows

VELUX also sells smoke ventilation windows for flat roofs. Follow the link to read more. 

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Tried and
tested design

VELUX smoke ventilation windows are built upon VELUX top operated manual windows. Read more about the additional benefits of a VELUX top operated window, by following the link below.

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Professional information

​Are you an installer or a dealer – follow the tab Professionals at the bottom of the page to find more information about the product such as CE marking, installation instructions, spare part overviews, test reports and specifications.

See here

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Product warning - smoke ventilation

VELUX Group has issued a warning to customers regarding a
defect in our smoke ventilators involving a lock ring that can detach.

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The products concerned were sold between 1 March 2015 and 10 January 2016.

The nature of this defect is that in situations where there is significant snow load on the window, the lock ring may detach itself during opening and consequently the window does not open. If there is no snow load or only moderate snow load, the window will open even with a defective lock ring.

The top sash of your smoke ventilation window has a data plate. It is visible when you open the window using the control bar. If your smoke ventilation has this defect, you will see the following information in the top left part of the data plate:
VELUX Group will arrange for the repair of this defect.

Please contact us immediately by phone on (service phone number) or by e-mail at (e-mail address) , if you have purchased a Smoke Ventilator with one of the above serial numbers.