Smoke Control Interface
How the fire alarm system ties into building smoke control — the difference between dedicated and non-dedicated systems, the firefighters’ smoke control station (FSCS) that gives responders manual override, and the response time the fans and dampers must meet. The fire alarm panel activates smoke control automatically; the FSCS lets firefighters take manual command.
Dedicated vs non-dedicated
| Type | Definition |
|---|---|
| Dedicated | Equipment (fans, dampers, controls) used only for smoke control and no other function. |
| Non-dedicated | Shares components with the building’s normal HVAC, reconfigured into a smoke-control mode on activation. |
Interface & firefighters’ control
| Topic | Detail |
|---|---|
| Automatic activation | The fire alarm control panel activates smoke control automatically on detection. |
| Firefighters’ smoke control station (FSCS) | An IBC 909.16 firefighter panel giving manual override of fans and dampers, with three-position ON / AUTO / OFF switches; AUTO is the normal position. |
| FSCS priority | FSCS commands have the highest priority over all smoke-control equipment. |
| FSCS status indication | Status is shown for all dedicated smoke-control fans and for non-dedicated fans over 2000 cfm used for smoke control. |
| FSCS location | In the fire command center where one is required, otherwise adjacent to the fire alarm control panel. |
| Response time | Fans and dampers must reach their operating state and confirm at the panel within 60 seconds (IBC/IFC 909.17). |
Automatic operation, manual override
Smoke control runs in two modes. In normal operation the fire alarm control panel drives it: on detection, the panel commands fans and dampers into their smoke-control positions — pressurizing stairwells, exhausting the fire floor, closing off other zones — all automatically, within 60 seconds. The firefighters' smoke control station then hands that control to the fire department: a responder at the FSCS sees the status of every fan and damper and can override any of them, with the FSCS command outranking the automatic logic. That override is why the FSCS switches sit in ON / AUTO / OFF — AUTO lets the building run itself, ON and OFF let a firefighter force the issue.
Common questions
What is the difference between dedicated and non-dedicated smoke control?
A dedicated smoke control system uses equipment — fans, dampers, controls — that exists only for smoke control and does nothing else. A non-dedicated system shares the building’s normal HVAC equipment, which is reconfigured into a smoke-control mode when the fire alarm activates. Non-dedicated is more common because it reuses the HVAC already there.
What is a firefighters’ smoke control station?
The FSCS is a firefighter-only control panel, required by IBC 909.16, that gives responders manual override of the smoke control system — direct control of fans and dampers with three-position ON/AUTO/OFF switches. AUTO is the normal position and lets the automatic system run; a firefighter can force any fan or damper on or off, and those commands take the highest priority over the automatic controls.
How fast does smoke control have to respond?
Under IBC/IFC 909.17, the fans and dampers must reach their expected operating state and confirm proper operation at the smoke-control panel within 60 seconds of activation. The fire alarm panel initiates smoke control automatically on detection; the components then sequence into position quickly enough to control smoke before the space exceeds its design condition.
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