Unit 5, Eurotech Park · Plymouth PL5 3FR Open Mon–Fri · 08:00–16:30 Call 01752 659415 24/7 emergency response for contracted clients BAFE - NICEIC - IFC - Safe Contractor Unit 5, Eurotech Park · Plymouth PL5 3FR Open Mon–Fri · 08:00–16:30 Call 01752 659415 24/7 emergency response for contracted clients BAFE · NICEIC · SMAS accredited
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AOV Smoke Ventilation Accessories

Complete AOV system components

BLEC supplies a full range of smoke ventilation accessories — the control points, override switches, sensors, power supplies and monitoring devices that turn a panel and vent into a complete, certified system. 

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  • BS 7346-8 compliant
  • BAFE registered
  • BS EN 12101‑2 Vent Standard
AOV & Smoke Ventilation · System Accessories

One supplier for the whole system, not a parts list

Accessories bought piecemeal are the most common cause of a smoke ventilation system failing its test. We supply, wire and commission the full range as one job.

Full Range

System components we supply

Every accessory below is specified against your control panel and vent schedule, then wired and tested as part of the same commissioned system.

Manual Control Points

Manual controls for straightforward operation and reset of smoke ventilation systems.

Firefighter Override Switches

Dedicated controls giving firefighters direct manual operation of smoke ventilation equipment.

Interface Modules

Interface modules connecting smoke ventilation controls with fire alarms and other systems.

I/O Modules

Input and output modules for system expansion, monitoring and connection of additional equipment.

Battery Sets

Backup battery sets maintaining smoke ventilation control during mains power failure.

Power Supplies

Reliable power supplies providing the required DC power for control panels and connected equipment.

Weather Sensors

Weather sensors monitoring external conditions for automatic ventilation control and system protection.

Wind Sensors

Wind sensors monitoring wind conditions to control connected ventilation equipment automatically.

Rain Sensors

Rain sensors detecting rainfall to control connected ventilation equipment automatically.

Network Cards

Network cards connecting compatible control panels for system communication and network integration.

Remote Monitoring Devices

Remote monitoring devices providing clear visibility of system status, alarms and faults.

Junction Boxes

Junction boxes providing secure, protected connections between vents, actuators, sensors and controls.

Common Questions

Components for new and existing AOV systems

We supply components for both new AOV installations and existing systems requiring upgrades, replacement parts or additional equipment.

Specify the full accessory range on your next scheme

Tell us your control panel make/model and vent count, and we’ll confirm exactly which components your system needs.

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Yes. We supply replacement components for existing AOV systems, including common parts such as batteries and manual call points. We can assess the existing equipment before confirming the correct replacement.

Yes. We service and maintain AOV systems installed by other contractors and work with equipment from several major manufacturers. We can assess the existing system and identify compatible components.

Battery requirements depend on the control panel and system specification. We check the existing equipment and confirm the appropriate replacement rather than supplying a generic battery.

Yes. We can inspect faulty manual control points as part of an AOV service visit and replace them where the correct compatible component is required.

Yes. We test the relevant components as part of AOV commissioning and servicing, including control equipment, power supplies, standby batteries and associated system operation.

Yes. We work with a range of major AOV manufacturers, including Velux, Ventec, S E Controls, Window Master, Dyer, Easivent and SCS. We confirm compatibility against the existing system before supplying replacement components.