AOV & Smoke Ventilation System Specialists

We are highly experienced suppliers of Smoke Vents, Automatic Opening Vents and SHEV units, with many years of industry knowledge.  We can always find the right product to match your specifications, whatever your project may require.  We offer a unique range of products to meet your building requirements and certification to EN12101-2.

Whatever your budget, we can help you to design and implement the right smoke ventilation system for you.  Choose from a range of materials, from polycarbonate to glass or insulated aluminium (depending on your building requirements). We even have a number of additional features to work with your system, including control panels, fireman’s switches, battery backup and smoke detectors. Other products such as Access Hatches and Ladders are also available to compliment your smoke and access requirements. Many of our products are kept in stock in our warehouse and are available with free delivery nationwide.

Smoke Vents by Type/Mechanism

No matter what you require we are sure to have a smoke mechanism type to suit your needs. Depending on the building plan or schematic, you may require a smoke vent with a particular mechanism. This could be dictated by the amount of free flow area of smoke that is required to be evacuated from the building or the location of the smoke vent within either the roof space or wall area available.
Some mechanism types are perfect for small area ventilation or areas where the smoke vent may be used for occasional access to the roof for maintenance, such as single leaf. Others are perfect for large areas like the double leaf smoke vent, where a more industrial specification may be required. Louvre roof smoke vents are great for use in locations that may be exposed to high wind loads such as high rise buildings, coastal locations or areas that require a specification of a higher security nature.
If you require any help or advice, please feel free to call our sales team who will be happy to help.

  • Different Mechanism types for various building applications.
  • A Huge range of units to comply with EN12101-2.
  • Compliant bespoke and off the shelf solutions.
  • Stand alone or networked capability controls.

Smoke Vents by location

When a fire breaks out the spread of smoke is rapid and can affect all areas of a building in minutes. Not all buildings are the same but for ease of use we have divided some of the most popular smoke vents / Automatic Opening vents and SHEV units into main building areas or zones. Some Smoke vent products are more suitable than others and may be required to meet additional regulations such as EN1634-1 in the case of some smoke shaft products and the level of fire rating needed.

No matter whether you are looking for a stairwell smoke vent, a roof smoke vent or a smoke vent window we are sure to have a smoke vent solution to meet both your design and regulation requirements.

  • Complete smoke vent solution no matter where they are required.
  • Seamless integration of units in various locations or Zones.
  • Units with specific properties for the areas they are to be installed.
  • Compliant bespoke and off the shelf solutions.

Therma-Vent Smoke Ventilators / AOVs

AOV’s or Automatic Opening Vents are rooflights which have been designed to reduce smoke build-up and therefore provide a safer escape route for the buildings occupants.

In the event of a fire smoke detectors instruct AOVs to open which allows cool air into the building and allows hot air and smoke to escape, resulting in improved conditions for the occupants to escape and for fire fighters to enter.

In the absence of a method of smoke ventilation, smoke fills the room being drawn back down from the ceiling by convection as temperatures rise, leading to potential – and particularly dangerous – ‘flashover’. This is the stage of a fire whereby a room or other confined area becomes so heated that the flames flash over and through the vapours being produced by heated combustible contents in the space.

The specific design of an effective and safe AOV smoke ventilation system requires specialist involvement, perhaps by the mechanical and electrical consultant, and may well form part of a fire engineering solution.

Our Control & Accessory Products

Some great additions to any smoke vent system… View More Here

With a wide range of brands to suit your needs

click below to see some of our most popular products

Thermadome AOV London Residential above 1

Thermadome offer a huge range of smoke vent products to suit the whole building envelope requirements. Weather you are looking for a single leaf smoke vent for the top of a lift or smoke shaft or an AOV at the top of a lobby or communal staircase area, Thermadome are sure to have the right product to suit your needs.

Stardome AOV open

Stardome smoke vents are high quality flat roof polycarbonate or solid lid AOV’s designed to make optimum use of roof opening sizes. They are offered in a wide range of sizes, shapes, and glazing options to meet virtually any specifier and user requirement whilst still complying with CE EN 12101-1.

Astroglaze Web-Version

Astroglaze glass rooflights are designed to provide high levels of natural daylight with excellent aesthetics, high insulation values and simple on-site installation. All units feature sealed double glazed units contained within a thermally enhanced aluminium frame which is available in either a white or slate grey finish as standard.

They are designed to sit over builders timber kerbs and can be made to order to custom sizes in either single piece units or large multi-section units.

Coxdome SHEV Opening

They have been manufacturing rooflights since 1954, and in that time they have gained valuable experience in the manufacture and distribution of specialist flat roofing daylight and ventilation systems throughout the entire UK. Everything they manufacture at JET COX is quality tested to the very highest standards. With professional accreditations and ISO9001– 2008, all aspects of their manufacturing and operational process is stringently audited to ensure their processes maintain consistency and their production continually meets the requirements of their customers.

Lunaglaze Smoke Vent

The Lunaglaze glass smoke vent range is a real step forward in double glazed glass smoke vents. Architects, developers and end users face many challenges in specifying, installing and using glass smoke vents. Lunaglaze offers new solutions in comparison with traditional brands. There are improvements in performance, environmental benefits and user benefits not previously available with other ranges.

Starglaze AOV (7)
starglaze-logo-small (1)

Starglaze glass rooflights provide a choice of natural lighting solutions and automatic opening vents for projects of virtually any size. Whatever the size or space, there will be a Starglaze smoke vent or skylight to fit. With fully concealed motors if required they are sure to provide long lasting and aesthetically pleasing products to your building or renovation project.

Smoke Vent Services

We try to provide our customer with the best possible service

Quality Assurance

With many years’ experience in the industry, you can rest assured that our team only work with the highest quality products and brands.

Personal Service

We always put our customers first and promise to provide you with the highest levels of customer service.

Wide Range

A large selection of materials, brands and design features to help you create the perfect smoke ventilation system.

Free Quotes

Find out how we can help you with a free quote from our friendly and experienced team.


Our knowledgeable team can help you find exactly what you need – they are always on hand to offer assistance.


We offer free delivery nationwide throughout the UK for all our products.

What Does AOV Mean?

AOV stands for Automatic Opening Vent

How do AOVs, or Smoke Vents, Work?

AOVs are triggered by smoke detectors which signal to actuators to open the smoke vents. In the event of a fire the vent will open to a predetermined height and angle for optimal ventilation of smoke and heat.

How often should AOVs be tested?

To conform to BS7346, BS558 and EN12101 smoke vents need to be serviced and maintained once a year. We recommend regular servicing by a qualified professional on a regular basis.

How Does A Smoke Vent Work?

Smoke vents are openings such as windows or skylights that allow for the smoke and hot air to escape. AOV (automatic opening vent) are vents that open automatically when an outbreak of fire is detected.

How Does An AOV System Work?

Automatic opening vents control the ventilation of the building. Any smoke and heat will be taken into the ventilation system and discarded of in a safe location. When a detector is triggered the AOV system will open and create ventilation through the system.

Why choose us?

  • Experts In The Industry

    With many years’ experience in the smoke vent and dome light industry, we are the premier company to call on for your project.  Supplying products to trade, contractors and builders, as well as individuals, we can provide the ideal solution for your needs.

  • Extensive Range

    We have a great range of products from excellent brands such as Stardome, Astroglaze, Skylantern, Solarglaze and Thermodome.  We stock our products right here in the UK, so we can supply any product to any location easily and quickly.

  • Free Quotes

    We offer a completely free quotation for your smoke ventilation system!

  • Easy Ordering

    We have a team of experts on hand to help you select the right products for your needs and specification.  Placing an order is simple – just contact us to speak to our helpful team!

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    National Domelight Company
    Room 205
    Basepoint Business Centre
    377-399 London Road
    GU15 3HL

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