Firemans Override Switch EV-HE077

£81.00 / £97.20 incl. VAT

The firemans override switch provides an override facility for smoke vents and can be used for system testing. Each switch comes complete with a plastic enclosure, break glass pane, 3 LED indicators for “OK”, “Fault” and “Alarm” plus an audible buzzer.

Available for Next Working Day Dispatch

Frequently Bought Together

Firemans Override Switch + Smoke Detector + ev-301
Price for all three: £537.00

The smoke vent override switch (HE-077) provides local override control of the smoke vent and head of stair vent with a visual and audible indication and is UKCA & CE Marked to prEN 12101-9 BS ISO 21927-9.

Two buttons provide override open, close and reset functions and three coloured LEDs with an audible buzzer indicate system health, fault and alarm status.

The override switch is connected directly to the local interface panel and should be located at the firefighter’s place of safety such as the stairwell adjacent to the lobby entrance. The hinged door is secured by a common key lock to prevent tampering and has a frangible break-glass element for emergency use.

This fireman’s override switch is compatible with the following control panels:

  • EV-301
  • EV-601
  • SP200 (ST43148)
  • SP300 (ST43160)
  • SP600 (ST43161)

Only available in Orange (EN 12101).

If you require an alternative colour, spare housing for the HE range is available in a variety of colours.

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.

Dimensions 125 × 125 × 35 mm



BS ISO 21927-9, prEN 12101-9


3 Wire to interface panel


ABS plastic RAL 2011 orange

IP Rating



24VDC, 32mA


H:125mm x W:125mm x D:35mm

Product Weight


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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