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Chapter 1 Smoke control overview
6 BAS-APG001-EN
Zoned smoke control cannot limit the spread of smoke within the smoke
control zone. Consequently, occupants of the smoke control zone must
evacuate as soon as possible after fire detection.
Figure 3: Sample arrangements of smoke control zones
When an HVAC system serves multiple floors (Figure 4 on page 7) and
each floor is a separate zone, the following sequence provides smoke
control:
1. In the smoke control zone, the smoke damper in the supply duct
closes and the smoke damper in the return duct opens.
2. In adjacent and/or unaffected zones, the smoke dampers in the return
ducts close and smoke dampers in the supply ducts open.
3. If the system has a return air damper, it closes.
4. Supply and return fans activate.
+ : Represents high-pressure zone
– : Represents low-pressure zone