Smoke Ventilation Systems (AOV Systems)
Automatic Opening Vent (AOV) systems play a vital role in protecting lives and property during a fire. These systems automatically open vents, windows, or roof hatches to release smoke and heat, keeping escape routes clear and improving visibility for evacuation and firefighting.
At EAC Fire & Security, we design, install, commission, and maintain fully compliant AOV and smoke ventilation systems for residential, commercial, and multi-occupancy buildings across Dorset, Hampshire, and the South Coast.
EAC Fire and Safety - Smoke Ventilation Systems
What is a Smoke Ventilation System?
A smoke ventilation system, also known as an AOV (Automatic Opening Vent), is a life safety system designed to automatically remove smoke from a building in the event of a fire. When activated by smoke detectors or manual call points, the system opens designated vents or windows to let smoke escape, reducing heat buildup and maintaining tenable conditions within stairwells and corridors.
Common installations include:
Apartment block stairwells
Communal corridors in HMOs and flats
Car parks and basement areas
Commercial buildings and office blocks
Why AOV Systems Are Essential
Without adequate ventilation, smoke can rapidly fill escape routes, making evacuation difficult or impossible. A correctly installed and maintained smoke vent system helps:
Keep escape routes clear for safe evacuation
Improve visibility for firefighters
Reduce smoke and heat damage to property
Comply with Building Regulations (Approved Document B) and BS EN 12101 standards
Our Smoke Ventilation Services
EAC Fire & Security provides a complete end-to-end service for smoke ventilation systems, including:
Design & Installation
We design bespoke AOV systems to suit your building layout and fire strategy, ensuring compliance with the latest legislation. Whether it’s automatic roof hatches, window actuators, or stairwell ventilators, we supply and fit reliable, certified components from trusted manufacturers such as VELUX, Sertus, and SE Controls.
Commissioning
Every system is tested and commissioned to meet the required performance standards, ensuring correct operation of detection, control panels, and vent mechanisms.
Maintenance & Servicing
Regular maintenance is essential for keeping AOV systems operational and compliant. Our engineers carry out thorough inspections, functional tests, and battery condition checks, providing full service reports and certification.
Why Choose EAC Fire & Security?
Fully trained and certified engineers
Decades of experience in fire alarm and smoke control systems
Comprehensive design, installation, and servicing packages
24/7 emergency support and call-out coverage across Dorset and Hampshire
Compliance with BS 9991, BS 9999, and BS EN 12101 standards
Smoke Ventilation Systems (AOV Systems) FAQ's
An AOV (Automatic Opening Vent) system automatically opens vents, windows, or roof hatches during a fire to remove smoke and heat. This keeps escape routes like stairwells and corridors clear, allowing people to evacuate safely and helping firefighters access the building.
AOV systems are typically required in multi-storey residential buildings, HMOs, apartment stairwells, and corridors that form part of a protected escape route. They may also be used in car parks, basements, and commercial buildings as part of the fire strategy.
Yes. Building Regulations (Approved Document B) and British Standards (BS EN 12101 and BS 9999) specify the need for effective smoke control in multi-occupancy buildings. A correctly designed and maintained AOV system ensures compliance and life safety.
Smoke ventilation systems should be inspected and tested at least once every six months, with additional weekly or monthly visual checks recommended by the building’s responsible person. Regular servicing ensures all vents, actuators, and control panels operate correctly in an emergency.
Yes. EAC Fire & Security can design and install retrofit smoke ventilation systems that integrate seamlessly with your existing fire alarm setup, even in older or listed buildings. We’ll ensure the solution is both compliant and practical for your property layout.
All AOV systems are fitted with battery backups and fail-safe mechanisms. If mains power is lost, the backup batteries will automatically power the system, ensuring vents still open as required. Regular maintenance is essential to keep these safety features operational.
Yes. Most AOV systems are linked to the building’s fire alarm or smoke detection system. When smoke is detected, the AOV control panel automatically opens the vents. Manual override switches are also installed at each level for added safety and control.
