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Free Vent Area Calculation

In order to clear the smoke at the correct rate, the recommended free vent area you need to achieve from your window or windows is:

Bottom Hung Smoke Vent Window

Stairwell Windows: 1mtr square free vent area at 90 degrees from the opening vent.

Lobby Windows: 1.5mtr square free vent area at 90 degrees from the opening vent.

 

 

 

 

 

Windows should be bottom hinged & open out or side hinged open out and ideally above the head of the door to clear the smoke above head height.
 

Find Out How We Will Work With You On Your Smoke Vent Project >>

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