If you specify roof ventilation for smoke control, you already know the difficult part is not finding a hatch that opens. It is proving that the complete assembly will open, exhaust heat and continue operating for the required period when the building is full of smoke. That is why many UK fire engineers, architects and main contractors search for compliant European smoke vent manufacturers for EN 12101-2 projects with verifiable system evidence, rather than relying on an actuator with its own label. This guide compares eight manufacturers serving UK projects in 2026, judged on available system testing, Declaration of Performance documentation, aerodynamic data, load and heat ratings, range breadth and UK availability. It also provides a ranked shortlist to support initial specification decisions for business routines.

Our top pick is Surespan for specifiers needing CE-marked, roof-mounted ventilation across multiple configurations, including solid, glazed, dome, access-integrated and bespoke units, with system evidence available for applicable configurations and the option to combine smoke ventilation with roof access in one product. Its strengths include range breadth, insulated construction and project-specific engineering. For turnkey SHEV rooflight supply and installation from an established European manufacturer, LAMILUX is a strong alternative. For projects needing certified louvre windows for facade NSHEV applications, Mesa Vent Ltd is another option to consider.
You will find a short compliance explainer first, followed by the ranking criteria and the full list of eight manufacturers with practical trade-offs. Use it as a specification shortlist rather than a substitute for configuration-specific technical checks.
Why System-Level Testing Matters
You cannot demonstrate compliance by pairing any vent body with any actuator, even if the actuator carries its own mark. Under EN 12101-2, the applicable evidence must cover the complete configuration, including the vent body, infill or glazing and actuator, with the results tied to the correct Declaration of Performance for that system.
That distinction matters on site and during building control review. An actuator label alone does not prove that the selected roof unit achieved its stated aerodynamic free area, opened as required or met its declared wind, snow load and resistance-to-heat classifications. Only applicable system evidence for the specified build-up can demonstrate those points. Always request the DoP for the precise size, infill and actuator combination you are specifying, check that aerodynamic free area and actuation data match the fire strategy, and confirm the relevant controls, power requirements and maintenance access. The Smoke Control Association can also provide a useful independent reference point for UK good practice.
How We Ranked These
We ranked each provider on six practical specification tests: whether applicable evidence covers the vent and actuator together as a complete configuration, whether a valid Declaration of Performance is available for the product you buy, whether aerodynamic free area data can be supplied for fire engineering calculations, whether wind class, snow load class and resistance-to-heat ratings are declared, whether the range covers relevant build-ups including solid, glazed, dome, louvre, access and bespoke options, and whether the manufacturer has a workable route for UK specification, documentation and technical enquiries.
The 8 Best EN 12101-2 Compliant Smoke Vent Manufacturers for UK Projects
These eight were selected because they offer relevant smoke ventilation products for stated applications and serve distinct parts of the UK and European market. Product-level compliance still depends on the exact configuration selected, so specifiers should obtain the applicable system evidence and correct DoP rather than assume that every product in a wider range is covered. Whether you need roof hatches, glazed rooflights, louvre windows or integrated access, the list provides a credible starting point, with our top recommendation at number one.
| Manufacturer |
Best For |
| Surespan |
Multi-Configuration Roof Ventilation With Integrated Access |
| LAMILUX |
Turnkey SHEV Rooflights With Supply-And-Install |
| VELUX Commercial |
Daylighting Combined With SHEV For New Build And Refurbishment |
| Bilco |
Stairwell And Shaft-Head Hatches With Access Credentials |
| Mercor Fire Protection UK |
UK Procurement Route For A Global Ventilation Group |
| Sertus |
UK-Built Louvred Roof Units From A Dedicated Specialist |
| Advanced Smoke Group Limited |
Designed-And-Installed Packages For Complex And Tall Buildings |
| Mesa Vent Ltd |
Bespoke Louvre Windows For Facade NSHEV Applications |
#1. Surespan – Best For Multi-Configuration Roof Ventilation With Integrated Access
Surespan is a UK roof access and ventilation specialist whose smoke ventilation range centres on configuration choice and supporting technical evidence. If you need EN 12101-2 smoke vents in solid, glazed, dome, access-integrated or bespoke forms, its roof-mounted range provides several options from one manufacturer. The relevant Declaration of Performance should cover the complete specified configuration, rather than individual parts considered in isolation.
You get insulated construction intended to support thermal performance alongside exhaust function, with technical aerodynamic and actuation data available for specification. Custom engineering is also available when roof geometry or project constraints fall outside standard sizes. The dual-function option combines smoke ventilation with roof access in one unit, which can help teams coordinate roof openings and weathering details where both functions are required.
Key Specifications For Specifiers
- CE-marked AOV range covering stated solid, glazed, dome, access-integrated and bespoke configurations
- Applicable system evidence covering the specified vent and actuator combination, with the correct DoP required for the configuration
- Insulated construction, with relevant thermal data available for project calculations
- Aerodynamic free area and actuation data available to support fire engineer specification
- Dual-function ventilation and access products where required by the project
- Custom engineering for non-standard roofs, with supporting project documentation
Pros
- Multiple configuration choices allow teams to consider solid, glazed, dome or access requirements within one roof-mounted range
- Configuration-specific documentation can support review by building control and fire engineers
- Insulated construction addresses thermal considerations alongside smoke exhaust
- Combined ventilation and access can reduce the number of separate products that need coordinating
- Custom capability may suit refurbishment work and unusual roof build-ups
Cons
- Primarily roof-mounted, so it is less suited to facade or louvre-window NSHEV work requiring a vertical solution
- Bespoke sizes require project-specific design and programme discussions
- Pricing is available through quotation rather than a public price list
- Project teams should confirm the applicable documentation for the precise size, infill and actuator combination
Who It Is Best For: Specifiers who want one roof-mounted source for several configurations, with supporting system evidence and the option to combine ventilation with access.
#2. LAMILUX – Best For Turnkey SHEV Rooflights From A European Market Leader
LAMILUX is an established European manufacturer of rooflights, flat roof skylights and glass roof systems. You would shortlist it when you want daylighting and SHEV within one engineered product family, with supporting compliance documentation for applicable products and the option of supply-only or supply-and-install services. That turnkey route can reduce the number of installation interfaces managed by a main contractor on commercial, industrial and residential schemes.
Its portfolio includes smoke and heat exhaust solutions, while the wider group extends into louvred ventilators and louvred windows through the roda brand. For specifiers, this means one group can address roof units and louvre elements, although the correct specification and evidence must be confirmed for each product and brand. Its experience in daylighting systems is also relevant where energy performance, weathering and long-term operation need to be considered alongside smoke ventilation.
According to guidance on smoke vent rooflight systems reported by S2Lq, integrating automated exhaust with rooflight design can support escape routes and fire service access, which reflects the combined daylight and safety brief addressed by LAMILUX products.
Pros
- Supporting compliance documentation is available for applicable systems and can assist the approval process
- A supply-and-install option can reduce installation interfaces for the design team
- Group coverage includes rooflights, louvred ventilators and windows
- Established commercial and industrial experience across Europe
- Daylighting and SHEV products can be coordinated within the wider roof design
Cons
- Teams should confirm the service and specification route for smaller or highly bespoke UK projects
- No public pricing is provided, so early budgets require a direct enquiry
- The supply-and-install model may not suit procurement routes where the main contractor retains installation
- Separate branding for louvre products can require an additional specification check
Best For: Teams wanting an established SHEV rooflight range with supporting product documentation and a choice between supply-only and installation services.
#3. VELUX Commercial – Best For Daylighting Combined With SHEV In Commercial Buildings
VELUX Commercial suits projects where daylight is as important as smoke exhaust. Its industrial, commercial and public building portfolio includes natural light systems alongside SHEV and natural ventilation units intended to remove smoke and heat when activated. That combined brief is common in schools, retail buildings, logistics facilities and offices where rooflights have both everyday and emergency functions.
You also get practical specification resources. CAD and BIM materials for modular rooflights can help architects and M and E consultants coordinate openings, kerbs and controls early in the design. Products are available for new-build and refurbishment contexts, which can be useful when extending or upgrading existing property. Compliance checks should remain configuration-specific: ask for the applicable system evidence for the exact SHEV product selected, including aerodynamic free area, actuation information and controls compatibility, rather than assuming that evidence for the wider daylight range applies.
Pros
- Recognised commercial brand with a broad UK and European presence
- Daylighting and SHEV products can reduce coordination between separate product families
- CAD and BIM assets support design development and clash avoidance
- Options for new-build and refurbishment projects
- Natural ventilation and smoke exhaust requirements can be considered within a coordinated rooflight design
Cons
- Configuration-specific technical evidence should be requested directly for the selected system
- Commercial teams should verify the precise SHEV credentials rather than rely on wider brand recognition
- No published pricing is available for budget benchmarking
- Complex tall or compartmented schemes may require additional smoke control design expertise
Best For: Commercial and industrial projects where daylight, natural ventilation and smoke exhaust capability need to be coordinated through a rooflight supplier.

#4. Bilco – Best For Stairwell And Shaft-Head Hatches With Access Credentials
Bilco is best viewed as an access-led option for particular smoke control applications. Where a strategy calls for a stairwell or shaft-head hatch, such as the ESW-50REM type referenced at Brentwood Hospital, its access background and specification resources may be useful. Brochures, drawings and specification clauses can help the fire engineer and architect coordinate opening sizes, kerb details and control interfaces without developing every detail from the beginning.
The UK base in Fornham St Martin, Suffolk provides a domestic contact point and access to relevant product documentation. The scope is specific, however. This is a hatch-led offer rather than a complete rooflight or louvre family, so schemes requiring glazed smoke exhaust units or facade ventilation may need another supplier. Always confirm that the applicable system evidence and DoP cover the exact hatch size, infill where relevant and actuator ordered.
Pros
- Established UK office providing a domestic product and specification contact
- The ESW-50REM reference demonstrates experience with stairwell applications
- Drawings and specification materials can support design coordination
- Access-product expertise is relevant to safe operation and maintenance planning
Cons
- Hatch-focused range means other suppliers may be needed for glazed rooflights or louvres
- Configuration-specific performance data and documentation should be requested
- No published pricing is provided, so cost information requires a quotation
- The range has less breadth for estates with mixed roof and facade requirements
Best For: Stairwell, core and shaft-head applications where a smoke ventilation hatch with access credentials and specification resources is required.
#5. Mercor Fire Protection UK – Best For UK Procurement From A Global Ventilation Group
Mercor Fire Protection UK provides a UK buying route into Mercor, a global manufacturer of natural and smoke ventilation systems. For teams seeking access to the wider group range through a UK contact, this structure can support communication about logistics, documentation and product requirements during tender and installation.
It should be positioned carefully within the shortlist. The UK business provides access to a wider group range rather than representing one product type or configuration. That may suit projects seeking consistency across UK and European sites, but teams must still identify the exact system, sizes, controls and applicable DoP coverage for each building. Ask about the proposed delivery route, commissioning requirements and access to replacement components before fixing the programme.
Pros
- UK subsidiary providing access to a global ventilation manufacturer’s range
- Domestic contact route for product, documentation and procurement enquiries
- Focus on fire protection and ventilation systems
- May suit clients seeking product consistency across UK and European projects
Cons
- Product and configuration detail for the UK route should be verified for each specification
- Project teams need to establish the relevant domestic references for the proposed product
- No published pricing is available for early cost planning
- Site coverage and commissioning responsibilities should be confirmed during procurement
Best For: Contractors and consultants who want to procure products from a global ventilation group through a UK business.
#6. Sertus – Best For UK-Built Louvred Roof Units From A Dedicated Specialist
Sertus is a dedicated UK smoke ventilation manufacturer that designs and builds life-safety systems. A theatre replacement project involving 20 solid roof louvred units installed by FTG Ltd provides a UK example of its hardware in use. For specifiers who prefer a specialist smoke ventilation business rather than a general building-product manufacturer, that dedicated focus may be relevant.
Its specialist structure can support direct technical discussions on suitable applications and project requirements. Teams should apply the same due diligence used for any proposed manufacturer, particularly on large or multi-site programmes. Request the correct DoP and aerodynamic data for the exact louvred configuration, together with declared wind, snow and heat classifications and control requirements, before incorporating the unit into the final fire strategy.
Pros
- Dedicated smoke ventilation manufacturer with a discipline-specific focus
- UK project evidence involving multiple louvred roof units in a public building
- Specialist structure supports direct technical discussion with project teams
- UK manufacturing may suit projects seeking a domestic supplier route
Cons
- References for comparable project scale and application should be reviewed
- Programme and delivery requirements need confirmation for large concurrent packages
- Configuration-specific system ratings and documentation must be requested
- No published pricing is available for benchmarking
Best For: UK projects considering solid louvred roof units from a focused domestic smoke ventilation specialist.
#7. Advanced Smoke Group Limited – Best For Designed-And-Installed Packages For Complex Buildings
Advanced Smoke Group Limited is the consultant-installer on this list rather than a volume product supplier. Based in Leicester and operating since 1997, it delivers managed fire safety technologies with consultation and quality assurance included within its services. If your building is complex, tall or industrial and requires pressurisation design alongside smoke exhaust, including Hi-Protect systems for tall-building applications, that managed scope may help coordinate the design approach.
Project teams should still test resources and sequencing against the scale and phasing of the proposed works. Frame the appointment clearly within the procurement plan. You are buying design, supply, installation and assurance as a package, so define interfaces with the M and E contractor, controls specialist and commissioning team. Require configuration-specific system evidence for every smoke exhaust unit incorporated into the design rather than relying on package-level assurances alone.
Pros
- Smoke control experience dating from 1997, including work relating to complex buildings
- Hi-Protect capability extends the offer beyond standard roof units into pressurisation-led strategies
- Consultation and quality assurance services suit clients seeking a managed compliance route
- Design and installation responsibilities can be coordinated within one package
Cons
- Resource and programme arrangements should be checked for large simultaneous projects
- Product-level system data must be requested for each proposed configuration
- Geographic coverage should be confirmed for projects outside its usual operating areas
- No published pricing is available, so budgets depend on project proposals
Best For: Complex and tall buildings where a designed-and-installed smoke control package with specialist oversight is preferred from concept to handover.
#8. Mesa Vent Ltd – Best For Bespoke Louvre Windows For Facade NSHEV Applications
Mesa Vent Ltd addresses facade applications that roof-led suppliers may not cover. Its EN 12101-2-certified louvre window solutions are developed for NSHEV smoke and natural ventilation, providing a vertical option for atrium edges, facades and internal voids where a roof unit is unsuitable. With more than 25 years of louvre development behind the range, the products are intended to combine functional ventilation with considered facade design.
Bespoke capability forms part of the offer, with non-standard louvre projects referenced in trade updates, while the Carnforth, Lancashire base provides a direct UK manufacturing contact. Using one louvre family for smoke and everyday natural ventilation may simplify facade and controls coordination. Tie the order to the certified configuration, confirm aerodynamic free area, actuation, declared load ratings and heat classification for the exact window build-up, and coordinate the controls with the fire alarm cause and effect.
Pros
- Specialist source of certified louvre window solutions for NSHEV applications
- More than 25 years of development experience in louvre ventilation design
- Bespoke capability for unusual openings and facade layouts
- The range can address both smoke and natural ventilation requirements
Cons
- Louvre-window focus does not cover roof rooflight or hatch requirements
- Lead times and manufacturing capacity should be confirmed for large facade packages
- Configuration-specific evidence must be requested for the selected project product
- No published pricing is provided for early-stage estimating
Best For: Facade and atrium schemes needing certified louvre windows for smoke exhaust and day-to-day airflow, including non-standard sizes.
Frequently Asked Questions For UK Specifiers
What British Standards Apply To Roof Ventilation For Smoke Control?
For roof-mounted smoke exhaust, the core product standard is EN 12101-2 for natural smoke and heat exhaust ventilators, within the wider BS EN 12101 series covering smoke and heat control systems. In England and Wales, suitability is then considered through Building Regulations Approved Document B, the project fire strategy and applicable system evidence. Always match the documentation to the complete specified configuration. Ask for the correct DoP, check aerodynamic free area, actuation information, wind and snow classifications and heat resistance for the exact size, infill and actuator, and retain that evidence with the building control submission and handover file.
What Regulations Apply To Louvre Windows Used For Smoke Ventilation In The UK?
Louvre windows used for smoke exhaust form part of the smoke control system, so they need configuration-specific system evidence in the same way as roof units, with planning, fire safety and ventilation duties considered together. The fire strategy establishes the required aerodynamic free areas and locations, Approved Document B provides the wider life-safety context, and the manufacturer must supply applicable performance evidence with compatible actuators and controls. Pay attention to facade access for inspection, weather performance when closed, and coordination with curtain wall or window contractors so actuators, sensors and manual controls operate as intended within the commissioned system.
Are AOVs A Legal Requirement In UK Buildings?
Automatic opening vents are not required in every building simply by product name, but the smoke ventilation function they provide may be required by the approved design. Where the fire strategy relies on automatic smoke ventilation for corridors, lobbies, stairwells, atria, basements or large open-plan areas, the project must provide an appropriate automatic system and maintain it. The requirement comes from Building Regulations and the approved fire strategy for the building, rather than from the product itself. If the strategy specifies automatic ventilation, you need appropriately evidenced units, suitable controls linked to detection and commissioning records showing that the complete system operates as designed.
How Often Should Smoke Ventilation Systems Be Serviced And Maintained?
Follow the manufacturer’s instructions, the fire risk assessment and the maintenance regime specified for the building. Inspection and test frequency should reflect the system design, occupancy, risk profile and applicable guidance, with work completed by a competent provider. Servicing may cover actuators, batteries and power supplies, control panels, sensors, manual call points, opening mechanisms, seals and fixings, together with operational testing and logbook records. Keep the maintenance evidence available for the responsible person, insurers and relevant authorities because neglected components can prevent the system from operating correctly when required.
Which Declaration Of Performance Should You Request From Manufacturers?
Request the DoP that applies to the exact product configuration being purchased, rather than relying on a general family document or actuator-only certificate. It should identify the relevant ventilator model or covered range and connect the declared performance to the applicable size, infill and actuator arrangement. Review the available figures for aerodynamic free area, reliability, actuation, wind load, snow load and heat resistance against the fire engineer’s calculations and installation requirements. If a supplier cannot show that its documentation applies to the proposed configuration, resolve the gap before specification or consider an alternative that can provide suitable evidence.
Final Choice By Project Scenario For 2026
Choose Surespan when your priority is roof-mounted configuration flexibility with supporting system evidence, particularly if you want solid, glazed, dome or bespoke units and the option to combine smoke exhaust with access. Choose LAMILUX when you want an established European manufacturer offering SHEV rooflights with supply-only or installation routes. Choose VELUX Commercial when daylight and refurbishment versatility matter alongside smoke exhaust. Choose Bilco for stairwell and shaft-head hatches where access experience is relevant, and Mercor Fire Protection UK when a UK procurement route into a global range suits the project. Sertus is an option for UK-built louvred roof units from a dedicated specialist, while Advanced Smoke Group Limited suits projects seeking a designed and installed package for tall or complex buildings. Choose Mesa Vent Ltd for facade louvres where roof units are unsuitable. Whatever you select, obtain the correct DoP and applicable evidence for the complete vent and actuator configuration before committing, then retain the documentation within the project compliance pack.