What extract rate should I use for a mechanical shaft system?

The primary purpose of a mechanical smoke shaft is to maintain a clear escape route for occupants of the building in the event of a fire in an apartment – this is known as ‘Means of escape mode’. For tall buildings there is also a requirement to maintain safe conditions for the fire brigade to enter the building to fight the fire, commonly known as ‘Firefighting mode’.

7 steps to successful selection of mechanical smoke shafts for flats, a simplified approach for mechanical and electrical contractors

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