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Design considerations for smoke control
BAS-APG001-EN 17
Smoke feedback
Smoke feedback occurs when smoke enters a pressurization fan intake
and flows into protected spaces. Design techniques reduce the probability
of smoke feedback:
• Supply air intakes located below openings from which smoke might
flow, such as building exhausts, smoke shaft outlets and elevator
vents.
• Automatic shutdown capability to stop the system in the event of
smoke feedback.
For more information on smoke feedback, refer to SFPE 1995, Fire
Protection Engineering Handbook.