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Smoke Ventilation Roof Domes

Our range of smoke vent solutions is engineered to provide essential life safety protection in the event of a fire. Specifically designed for stairwells and common areas, these smoke vent roof dome window units (Automated Opening Ventilators) trigger automatically to clear smoke, maintaining visibility for evacuation and emergency services. Fully certified to EN12101-2, our collection includes high-performance domes from trusted manufacturers, ensuring your project meets all mandatory UK Building Regulations and fire safety standards.

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Critical Fire Safety: The Function of an AOV Smoke Vent

In a fire emergency, smoke inhalation is often a greater risk than the heat itself. A smoke vent window is a critical component of a building’s Fire Strategy. These systems are designed to open to a 140° or 160° angle within 60 seconds of activation, creating a clear path for smoke to escape. By exhausting toxic fumes, these units keep exit routes clear and help prevent the “flashover” effect by venting heat.

Full Compliance with EN12101-2 & Part B

When specifying a smoke vent, compliance is non-negotiable. All units supplied by LB Supplies are tested as complete assemblies (dome, upstand, and actuator) to ensure they perform under extreme conditions.

  • Reliability Classes: Our vents are tested for reliability (Re 1000) and wind load (WL 1500).
  • Low-Temperature Performance: Designed to operate effectively even in UK winter conditions (T-15).
  • Thermal Efficiency: Despite their primary safety function, these units feature multi-wall polycarbonate skins to maintain the building’s thermal envelope and satisfy Part L requirements.

Integrated Control Systems

A high-performance smoke vent window requires a sophisticated control interface. We supply comprehensive kits that include:

  • Battery Backup: Ensures the vent continues to operate even if mains power fails.
  • Smoke Sensors & Break-Glass Units: For both automatic and manual activation.
  • Comfort Ventilation: Many of our AOV systems can be dual-purposed for day-to-day natural ventilation, providing added value to the building’s occupants.

Technical Considerations for Installation

Correct sizing is vital to ensure the “Geometric Free Area” meets the requirements set out by the fire officer or architect. Whether you require a standard 1000mm x 1000mm unit for a residential stairwell or a larger bespoke solution for a commercial lobby, our technical team is on hand to provide the necessary calculations and certification.

Ensure your building is compliant. Contact LB Supplies for expert guidance on selecting the correct smoke vent for your specific application.