
Automatic opening vents keep escape routes clear of smoke during a fire, but only if they're correctly designed, installed, and regularly tested.
Automatic opening vents (AOVs) clear smoke from stairwells and escape routes, keeping evacuation routes clear and giving firefighters better visibility. We design, install and service smoke vent systems in line with BS 7346-8, with full testing and certification.
An AOV, or automatic opening vent, is a window, louvre, or roof hatch linked to a building’s fire alarm system that opens automatically the moment smoke is detected. By venting hot smoke and drawing in cooler air, an AOV keeps stairwells and corridors clear enough for people to evacuate safely, while also improving visibility for firefighters tackling the source of the fire. Smoke vent systems are typically found in multi-storey residential buildings, apartment stairwells, offices, and commercial premises where a protected escape route needs to stay smoke-free during a fire.

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Smoke Vent Systems

Smoke ventilation is a legal requirement in most multi-storey residential buildings, HMOs, and commercial premises where a protected escape route relies on staying clear of smoke. Whether you need a natural or mechanical system depends on the building’s height, layout, and fire strategy, and getting the design right from the outset is essential for both safety and compliance.
We design and install smoke vent systems tailored to your building, covering the full range of components: AOV windows and roof vents, smoke detectors, control panels, actuators, and break-glass call points, all fully integrated with your fire alarm system. Every installation is commissioned and tested to confirm each component responds correctly to a fire signal, with full documentation provided as part of your building’s fire safety records.
A smoke vent system that hasn’t been tested is a smoke vent system you can’t rely on. UK regulations require AOV and smoke control systems to be serviced at least twice a year, with functional testing of vents, actuators, and battery backups carried out by a competent engineer. We provide planned maintenance for smoke vent systems in line with BS 7346-8, giving you a detailed service report and certification after every visit.



CTS provides smoke vent system services throughout:
Whether you need a new smoke vent system designed and installed, or your existing AOVs are due their next service, our team can help. Contact us today to arrange a site visit or request a quote; we’ll make sure your escape routes stay clear when it matters most.
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From education and healthcare to retail, hospitality, and construction, our BAFE-certified engineers bring over 30 years of hands-on experience across a wide range of sectors. Whatever your industry, we'll make sure your fire alarms, CCTV, emergency lighting, and access control systems work together seamlessly, keeping your people, property, and business fully protected.
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At CTS Fire, we offer a full range of services designed to safeguard your business, property, and people. Whether you’re looking for a new fire alarm system, CCTV for your premises, or emergency lighting that meets compliance regulations, we’re here to provide you with reliable, expert solutions.