Smoke Extract Fan Unit with Integrated Controls | EV-EU

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A skid-mounted smoke extract fan with integrated dampers and controls designed specifically for smoke shaft applications. The smoke extract fan unit is factory-assembled and tested and reduces plant space requirements on the roof and the installation and commissioning period.

The Smoke Extract Fan Unit is compliant with all relevant standards:

  • Smoke Extract Fans and Inverters: BS EN 12101-3 F300
  • Controls: BS EN 61439-2
  • Ductwork: BS476 Pt 24, EN1366 Pt 1
  • Automatic Transfer Switch: BS8519 with maintenance by-pass & BS EN 60947-6-1

Smoke Extract Fan Components


The smoke extract fans are axial high-temperature fans, manufactured from hot-dipped galvanized steel sheets. All fans are tested to the latest internationally recognised standard ISO5801 Part 1, installation category D for aerodynamic performance, and BS848 Part 2 (1985) for acoustic performance. The fans and motors are rated at 300°C for 2 hours and are fully tested and certified to the requirements of EN12101-3. The fans are mounted in series onto a pre-assembled module using anti-vibration mounts. The fan assembly will contain a weatherproof discharge, a flexible connector, a gravity shut-off damper, and a fire-rated galvanised steel plenum section connected to the builder’s work roof up-stand above the extract shaft. The fan assembly will be mounted onto skids fitted with adjustable feet for mounting on a suitably prepared roof area.

Control System

The main system control panel is also located on the skid and pre-wired to the fans and dampers. An integral motor control centre provides the control and monitoring of the extract fans, dampers, doors, and stairwell AOVs through the communications network. The operation of the fans is to be monitored by current sensing so that in the event of fan failure the standby fan will be automatically started. All extract fans are inverter-controlled by the extract fan control panel. This is done in order to reduce starting currents and allow for adjustment of volume flow rates so that the required extract rates are achieved at the point of extract within the corridors. In fire conditions inverters operate in a run-to-destruction mode.

ATS Switch

Auto changeover of mains and standby power supplies is provided by an optional automatic transfer switch (ATS) module mounted on the common plant skid where required. The ATS is fully compliant with BS EN 8519:2010 with a bypass feature to maintain a fully operational system during maintenance work.

Under the Construction Products Regulations (CPR) it is a legal requirement to use only certified products for smoke ventilation. It is the responsibility of the installer to ensure installations meet the relevant standards. For more information see SCS Group’s Technical Bulletin.


630Ø, 1000Ø

Air Flow Rate

Run & Standby – 6.0m3/s from lobby


630Ø: 300Pa, 1000Ø: 375Pa


630Ø: 2050 L x 1250 W (mm), 1000Ø: 2332 L x 1670 W (mm)


630Ø: 500kg, 1000Ø: 800kg

Power Supply

630Ø: 400V 50Hz 3P&N 28A, 1000Ø: 400V 50Hz 3P&N 38A

Nominal Running Current

630Ø: 27.5A, 1000Ø: 36.5A


Galvanised Steel

Sound Power Level (Fire Mode)

630Ø: Inlet – 110 dB, 1000Ø: Inlet – 112 dB
630Ø: Outlet – 111 dB, 1000Ø: Outlet – 114dB
630Ø: Breakout – 97 dB, 1000Ø: Breakout – 102dB

Sound Power Level (Daily Ventilation)

630Ø: Inlet – 80 dB, 1000Ø: Inlet – 90 dB
630Ø: Outlet – 82 dB, 1000Ø: Outlet – 92 dB
630Ø: Breakout – 72 dB, 1000Ø: Breakout – 73 dB

IP Rating of Control Panel



Fans: EN 12101-3
Controls: BS EN 12101-10
Ductwork: BS EN 12101-7

Control Panels 4 to 5 weeks
Actuators (non-stock items) 2 to 3 weeks
Ventilators 4 to 5 weeks
Louvred Windows 8 to 10 weeks
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