Fire ventilation
Fire ventilation
Fire ventilation
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In buildings that have systems for pressurising<br />
(positive or negative pressure) it should be borne in<br />
mind that:<br />
• Stairwells are not always placed in connection with<br />
outer walls.<br />
• The sectioning of evacuation routes can be simplifi<br />
ed.<br />
• Evacuation routes can be longer than normal.<br />
• The number of stairwells can be limited.<br />
• The system can make doors diffi cult to open or<br />
close.<br />
this reason they are normally connected to an automatic<br />
fi re alarm. The system starts when a fi re is detected. In certain<br />
cases, however, the system may need to be manually<br />
controlled, i.e. someone has to start the system with a switch<br />
or the like.<br />
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