Step-by-Step Guidance for Compliance and Reliable System Performance
Smoke ventilation systems control the movement of smoke during a fire, keeping escape routes tenable and supporting firefighting operations.
However, a smoke control system is only as reliable as the way it is commissioned. Poor commissioning is a recurring cause of smoke control failures, and one the wider industry sees repeatedly when systems are tested or maintained.
At Vent Trade, which has been operating and supplying the UK smoke ventilation industry since 1988, we regularly encounter systems that were installed but never properly commissioned. In many cases the equipment operates, but the system does not perform as intended in the building’s fire strategy.
This article outlines best practice commissioning procedures aligned with industry guidance and the principles set out in the Smoke Control Association (SCA) Guidance on the Maintenance of Smoke Control Equipment.
Why Does Smoke Ventilation Commissioning Matter?
Commissioning is the process of verifying that the installed smoke ventilation system operates exactly as intended in the fire strategy.
A properly commissioned system confirms that:
- Installed equipment matches the design specification
- Control systems follow the cause and effect matrix
- Smoke ventilation activates correctly during fire detection
- The system functions as an integrated life safety solution
The SCA guidance emphasises that smoke control systems exist to maintain tenable conditions in escape routes and support firefighting operations. A system that has not been properly commissioned cannot be relied upon during an emergency.
Step 1: Review the Fire Strategy
Commissioning should begin with a full review of the building’s fire strategy.
This includes reviewing:
- Fire strategy report
- Smoke ventilation design drawings
- Cause and effect matrix
- System schematics
- Performance calculations
At Vent Trade, commissioning engineers begin by confirming the design intent rather than simply testing equipment.
Key questions include:
- Is the system natural or mechanical smoke ventilation?
- Which zones activate during a fire?
- What airflow or vent area performance is required?
- What sequence should occur during fire alarm activation?
Testing a system without understanding the fire strategy is a common industry mistake.
Step 2: Identify All Smoke Control Assets
The SCA Maintenance Guidance highlights the importance of maintaining an asset register for smoke control systems, identifying each component and its function.
Typical smoke control assets include:
- Automatic Opening Vents (AOVs)
- Smoke dampers
- Smoke extract fans
- Smoke shafts
- Control panels
- Firefighter override switches
At Vent Trade, asset verification is a key stage of commissioning.
Each asset should be checked to confirm:
- Correct installation location
- Accessibility for maintenance
- Clear identification and labelling
- Compliance with system design
Proper asset identification supports both commissioning and long-term maintenance.
Step 3: Inspect the Installation
Before functional testing begins, the physical installation must be inspected.
Typical checks include:
- Vent and damper positioning
- Actuator installation
- Cable routing and fire resistance
- Control panel labelling
- Maintenance access
Poor installation practices remain a major cause of smoke control system failures discovered during maintenance inspections.
At Vent Trade, installation inspection is treated as a critical stage of commissioning rather than a quick visual check.
Step 4: Verify Power Supplies
Smoke control systems must operate during fire conditions, including during electrical failure.
Commissioning should verify:
- Primary power supply
- Secondary or backup power supply
- Automatic power changeover
- Fault monitoring
Backup power arrangements may include:
- Battery systems
- UPS systems
- Standby generators
The SCA guidance emphasises that secondary power supplies are essential to maintain smoke control operation during emergency conditions.
Step 5: Test Individual Components
Each component should be tested independently before system-wide testing begins.
Components to test include:
- AOVs and smoke vents
- Smoke dampers
- Mechanical extract fans
- Smoke control panels
- Firefighter override switches
Testing should confirm:
- Full actuator travel
- Opening and closing times
- Correct signal feedback
- Fail-safe behaviour
At Vent Trade, component-level testing is used to identify faults before full system activation begins.
Step 6: Validate the Cause and Effect Matrix
Smoke ventilation systems normally interface with the fire alarm system through a cause and effect matrix.
Commissioning should confirm that:
- Fire alarm activation triggers the correct smoke ventilation zones
- Smoke vents open as intended
- Firefighter override controls operate correctly
- System reset procedures function safely
Smoke control systems operate as part of a coordinated fire safety strategy that includes detection, compartmentation and evacuation.
Testing must confirm that these interactions work correctly.
Step 7: Confirm System Performance
Commissioning must confirm that the smoke control system meets the performance requirements defined in the design.
This may involve measuring:
- Vent opening times
- Mechanical extract airflow rates
- Pressure differentials
- Fan performance
- Smoke shaft extraction performance
At Vent Trade, commissioning engineers verify system performance against the design calculations rather than simply confirming that vents open.
Opening vents alone does not confirm system performance.
Step 8: Conduct Integrated System Testing
Integrated testing verifies that all components operate together as a complete smoke control system.
Examples include:
- Corridor smoke ventilation activation
- Smoke shaft extraction sequences
- Stair pressurisation activation
- Multi-zone fire alarm scenarios
Integrated testing confirms that the system behaves correctly under realistic fire conditions.
Step 9: Produce Commissioning Documentation
The SCA guidance highlights the importance of maintaining clear documentation for smoke control systems.
Typical commissioning records include:
- Commissioning certificates
- Cause and effect verification
- System test results
- As-installed drawings
- Operation and maintenance manuals
- System logbook records
Proper documentation supports regulatory compliance and future maintenance.
Step 10: Handover and Operator Training
Commissioning should conclude with a formal handover process.
Building operators should receive training covering:
- System operation
- Firefighter override controls
- Fault reporting procedures
- Maintenance requirements
At Vent Trade, handover includes ensuring building managers understand how the system works and how faults should be reported.
Smoke control systems require regular inspection and smoke vent servicing throughout the building’s lifecycle.
What Are the Key Steps for Commissioning a Smoke Ventilation System?
Effective commissioning of smoke ventilation systems should include:
- Fire strategy verification
- Asset identification and inspection
- Installation verification
- Power supply testing
- Individual component testing
- Cause and effect validation
- System performance testing
- Integrated system testing
- Full commissioning documentation
- Operator training
Commissioning is the final verification that the smoke control system protecting the building will operate when needed.
Final Thought
As a company that chairs the SCA Maintenance Guidance working group, we have seen how many smoke control systems fail not because of poor design, but because commissioning and maintenance were treated as secondary considerations.
Vent Trade has been supplying the industry since 1988, focusing on smoke control systems that are properly engineered, properly commissioned, and capable of performing when they are needed most.
Sources
Official guidance and standards referenced in this article:
