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A system to provide smoke and heat extract ventilation in accordance with BS 7346-4 and to comply with Building Regulations. Suitable for commercial and residential applications. CE Marked and compliant to applicable European Regulations.

OS Loop coordinator:

A modular smoke control system linking 1–64 remotely mounted manual control points (MCP's) via a coordinator. The coordinator contains the mains power conversion electronics which provides the 24 V DC power for operation. It also contains a back up battery supply. Each MCP contains actuator circuitry which also monitors actuator cabling and circuitry for faults. When a fault occurs a signal is went to the coordinator and from there to the remote alarms.

OS2 Control panel:

Suitable for standalone systems through to fully networked intelligent SHEV systems with BMS interface. Operates on a mains voltage primary power supply and contains integral fully monitored and intelligent battery backup for secondary power operation.


The OSLoop Control System continuously monitors all components within the SHEVTEC® system for their status. Should any component device develop a fault then this will be indicated on the relevant manual control point via a yellow LED. Audible warnings can also be initiated. For centralised indication of status and faults (for example in a designated Fire Fighters entrance) the SHEVTEC® Repeater Panel should be used.

The OSLoop system includes real-time event logging. This enables the system to indicate when maintenance is required and gives the maintenance engineer full diagnostics if required.


Tested to the principles of EN 12101-2.


Shaft inlets:

  • SHEVTEC® Dampers as section U14.
  • SHEVTEC® Smoke Shaft Door Actuator and Door as section L20.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
65-10-75/110 Smoke and heat exhaust ventilation system

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



SE Controls


+44 (0)1543 443060

Product reference

Natural Smoke Shaft System

Shaft inlets

[SHEVTEC® Damper]
[SHEVTEC® Smoke Shaft Door Actuator and Door, as section L20]


[Builder's work]


[SHEVTEC® Roof Vents And Louvres, as section L10]
[SHEVTEC® Glazed Louvre, as section L10]


[Manual control point (MCP)]
Allow the smoke control system to be manually overridden.
[Smoke detector]
Required to meet Building regulations. The detectors must solely be used to activate the SHEV.

24 V Controllers

[OS loop coordinator]
[OS2 control panel]


[SHEVTEC® Repeater Panel]
Provides system status information for each vent within a smoke ventilation system, as described in section U14.
[SHEVTEC® Smoke Shaft Floor Grille]
Safety grilles to facilitate maintenance access with the smoke shaft.

Manufacturer details

Lancaster House,
Wellington Crescent,
Fradley Park,
Staffordshire, WS13 8RZ
Tel +44 (0)1543 443060
Fax +44 (0)1543 443070
NBS Plus