--- title: "Fire-Rated Air Transfer Grille Installation — London, Kent, Sussex & Surrey | Flame Solutions Ltd" description: "Install fire-rated intumescent air transfer grilles — sized and fitted to the manufacturer's certified schedule — so ventilation is delivered across a compart" lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "@id": "https://flamesolutions.co.uk/#organization", "name": "Flame Solutions Ltd", "url": "https://flamesolutions.co.uk", "logo": "https://flamesolutions.co.uk/favicon.png", "telephone": "+447400436839", "email": "flamesolutionsltd@gmail.com", "address": { "@type": "PostalAddress", "streetAddress": "6 Byron Avenue", "addressLocality": "Coulsdon", "postalCode": "CR5 2JR", "addressRegion": "Surrey", "addressCountry": "GB" }, "founder": { "@type": "Person", "name": "Michael Sully" } }, { "@context": "https://schema.org", "@type": "WebSite", "@id": "https://flamesolutions.co.uk/#website", "url": "https://flamesolutions.co.uk", "name": "Flame Solutions Ltd", "inLanguage": "en-GB", "publisher": { "@id": "https://flamesolutions.co.uk/#organization" } }, { "@context": "https://schema.org", "@type": "Service", "@id": "https://flamesolutions.co.uk/services/fire-rated-air-transfer-grille-installation#service", "serviceType": "Fire-Rated Air Transfer Grille Installation", "name": "Fire-Rated Air Transfer Grille Installation", "url": "https://flamesolutions.co.uk/services/fire-rated-air-transfer-grille-installation", "provider": { "@type": "LocalBusiness", "@id": "https://flamesolutions.co.uk/#localbusiness", "name": "Flame Solutions Ltd", "telephone": "+447400436839", "email": "flamesolutionsltd@gmail.com", "address": { "@type": "PostalAddress", "streetAddress": "6 Byron Avenue", "addressLocality": "Coulsdon", "postalCode": "CR5 2JR", "addressRegion": "Surrey", "addressCountry": "GB" } }, "areaServed": [ { "@type": "Place", "name": "London" }, { "@type": "Place", "name": "Kent" }, { "@type": "Place", "name": "Sussex" }, { "@type": "Place", "name": "Surrey" }, { "@type": "Place", "name": "Croydon" }, { "@type": "Place", "name": "Sutton" }, { "@type": "Place", "name": "Bromley" }, { "@type": "Place", "name": "Sevenoaks" }, { "@type": "Place", "name": "Crawley" } ], "description": "Install fire-rated intumescent air transfer grilles — sized and fitted to the manufacturer's certified schedule — so ventilation is delivered across a compartment line without compromising the fire strategy, evidenced with product datasheets on handover." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much does a fire-rated air transfer grille cost, installed?", "acceptedAnswer": { "@type": "Answer", "text": "Priced by grille size and installation location. Cupboard door grilles are the most common and are priced per unit; wall and ceiling grilles are priced by aperture size and substrate." } }, { "@type": "Question", "name": "How long does installation take?", "acceptedAnswer": { "@type": "Answer", "text": "A single door grille is typically a same-visit install. Wall and ceiling grilles depend on substrate preparation." } }, { "@type": "Question", "name": "Do you provide a warranty on the grille?", "acceptedAnswer": { "@type": "Answer", "text": "The grille carries the manufacturer's certification and any product warranty from that manufacturer. We do not offer an additional warranty; our commitment is to install to the certified schedule." } }, { "@type": "Question", "name": "How long does a fire-rated grille last?", "acceptedAnswer": { "@type": "Answer", "text": "The certified life of the product provided the grille is not damaged, painted over or removed. Grilles found in poor condition on inspection are repaired or replaced." } }, { "@type": "Question", "name": "Can a grille be retrofitted into an existing fire door?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, provided the doorset's certification allows a grille of that size and location. If it doesn't, the aperture invalidates the doorset — the doorset itself may need to be replaced instead." } }, { "@type": "Question", "name": "Do you install in occupied buildings?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — most installations are in occupied residential and commercial premises." } }, { "@type": "Question", "name": "Can grilles be installed in walls and ceilings as well as doors?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — the certified system depends on the substrate and rating of the element the grille penetrates." } }, { "@type": "Question", "name": "Do you supply the grille or just install?", "acceptedAnswer": { "@type": "Answer", "text": "Both — grilles are supplied from certified manufacturers only, and installed to that manufacturer's schedule." } }, { "@type": "Question", "name": "Which areas do you cover?", "acceptedAnswer": { "@type": "Answer", "text": "London, Kent, Sussex, Surrey and surrounding boroughs including Croydon, Sutton, Bromley, Sevenoaks and Crawley." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://flamesolutions.co.uk/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "https://flamesolutions.co.uk/services" }, { "@type": "ListItem", "position": 3, "name": "Fire-Rated Air Transfer Grille Installation", "item": "https://flamesolutions.co.uk/services/fire-rated-air-transfer-grille-installation" } ] } ] --- [flamesolutionsltd@gmail.com](mailto:flamesolutionsltd@gmail.com)Serving London · Kent · Sussex · Surrey [](https://www.instagram.com/flamesolutionsltd/)[07400 436839](tel:+447400436839) [![Flame Solutions Ltd](/__l5e/assets-v1/8937fb61-d54f-4b77-aea7-a3f11a843ae3/flame-solutions-logo.png)](/) [Home](/)[About](/about) [Services](/services) [Areas](/areas) [Our Work](/our-work)[Reviews](/reviews)[Contact](/contact) [](https://www.instagram.com/flamesolutionsltd/)[Request Estimate →](/contact) We use essential cookies only, to make this site work. [Cookie policy](/cookie-policy) OK 1. [Home](/) 2. [Services](/services) 3. Fire-Rated Air Transfer Grille Installation ![Fire-rated louvred steel doorsets with certified air transfer grilles installed to a plant enclosure](/__l5e/assets-v1/90a8e9e9-6215-440f-8dbe-4ae396cb0708/fire-rated-air-transfer-grille-installation-1-after.jpeg) [← All services](/services) # Fire-Rated Air Transfer Grille Installation Intumescent Grilles in Doors, Walls & Ceilings London, Kent, Sussex & Surrey Install fire-rated intumescent air transfer grilles — sized and fitted to the manufacturer's certified schedule — so ventilation is delivered across a compartment line without compromising the fire strategy, evidenced with product datasheets on handover. [Request Estimate](/contact) [07400 436839](tel:+447400436839) 5 years' passive fire experience. Certified schedule, correct sizing, documented handover. Passive fire experience 5 years Third-party certification BM TRADA (via Sully Form Ltd) Employers' liability £10M Public liability £5M Accreditations Constructionline Silver · SafeContractor · SIPS Service overview ## What this service is — and when you need it. What it is Supply and installation of fire-rated intumescent air transfer grilles in fire doors, compartment walls and ceilings — sized to the ventilation requirement and rated to the required fire minutes of the element they penetrate. Who it's for HRB duty holders, housing associations, healthcare estates, commercial fit-out contractors, plant room and ventilation designers, and duty holders needing air movement across compartment lines. When it's needed During plant room and cupboard fit-out, following a ventilation strategy that requires air transfer across a compartment line, on refurbishment of communal risers, and where FRA has flagged uncertified 'holes' cut through doors or walls for ventilation. Why a specialist matters An uncertified vent in a fire door is a hole in the compartment line. A certified intumescent grille closes in fire while allowing airflow in normal use — but only when sized, sited and fixed to the manufacturer's schedule. What happens if this is ignored ## The consequence of leaving it. - A hole cut into a fire door for ventilation, without a certified grille, invalidates the doorset's certification and breaches the compartment line. - Undersized or oversized grilles fail to meet the ventilation requirement, or exceed what the certified detail allows. - Grilles installed without the certified fixing detail may not close correctly in fire. Common mistakes ## What we see go wrong. - Fitting a grille chosen by size alone, without matching to the door or wall's rating. - Cutting the aperture on-site without confirming the grille's certified aperture tolerance. - Not retaining product datasheets — the grille is invisible from the door's paintwork but the certification depends on the paperwork. - Using a decorative louvre instead of a certified intumescent grille. Our process ## A step-by-step system, from survey to handover. 1. Step 1 Requirement review Ventilation requirement and compartment element (door, wall, ceiling) reviewed against the fire strategy and rating. 2. Step 2 Grille selection Certified intumescent grille selected to match the ventilation requirement, the element's rating and the manufacturer's certified fixing schedule. 3. Step 3 Aperture preparation Aperture cut to the certified tolerance for the selected grille. 4. Step 4 Certified installation Grille installed to the manufacturer's schedule — fixings, seal, retention plate as specified. 5. Step 5 Handover pack Grille datasheets and certification retained and issued with the doorset or compartment element records for the safety file. Why clients choose Flame Solutions ## Specific outcomes, not vague promises. Ventilation without breaking the compartment line Certified intumescent detail closes in fire while allowing normal-use airflow. Correct sizing to the requirement Grille sized against both the ventilation need and the certified aperture allowance. Installed to certified schedule Fixings and seal detail follow the manufacturer's certification, not general judgement. Doorset certification preserved Certified aperture kept within the doorset's own certification limits — no invalidation. Documented for the safety file Grille datasheet retained alongside the doorset or compartment element records. One specialist for the whole detail Doorset, aperture, grille and evidence delivered by one team. In detail ## Materials, methods and where each applies. The technical detail behind how fire-rated air transfer grille installation is scoped, specified and installed to certified detail. Door-mounted intumescent grilles Wall and ceiling grilles to certified detail Sized to the ventilation requirement and door/wall rating ### Door-mounted intumescent grilles Certified intumescent grilles installed into fire doors have a specific certified aperture size and fixing detail for each door manufacturer. The doorset's certification includes an allowance for a certain grille size and type in a certain location — outside that envelope, the doorset is no longer certified as installed. ### Wall and ceiling grilles Wall and ceiling grilles have their own certified details for the substrate — drylining, blockwork, plasterboard ceiling — including the aperture size, backing detail and fixing arrangement. The intumescent element closes in fire, restoring the compartment line. ### Sizing to the ventilation requirement Grille sizing is a two-sided calculation — the free area required for the ventilation strategy, and the maximum aperture allowed by the certified system in the element it's installed into. The smaller of the two governs, and if the ventilation requirement can't be met inside the certified aperture, the strategy has to change (not the grille). ### Common applications — cupboards, plant, communal risers Typical applications are electrical cupboards, gas cupboards, boiler and plant spaces, and communal riser ventilation. Each has its own combination of door or wall element, rating and ventilation requirement. ### What we do not offer We do not offer a warranty on the grille beyond the manufacturer's own certification. Our commitment is to install to the certified schedule and hand over the product datasheets that support the doorset or compartment element records. Related services [Certified Fire Door Installation](/services/fire-door-installation)[Fire Door Maintenance & Repairs](/services/fire-door-maintenance-repairs)[Fire Stopping Services](/services/fire-stopping)[Compartmentation](/services/compartmentation) Serving [London](/areas/london), [Kent](/areas/kent), [Surrey](/areas/surrey), [Croydon](/areas/croydon) . See [all services](/) or [get in touch](/contact). Frequently asked ## Straight answers on cost, timing and process. How much does a fire-rated air transfer grille cost, installed? + Priced by grille size and installation location. Cupboard door grilles are the most common and are priced per unit; wall and ceiling grilles are priced by aperture size and substrate. How long does installation take? + A single door grille is typically a same-visit install. Wall and ceiling grilles depend on substrate preparation. Do you provide a warranty on the grille? + The grille carries the manufacturer's certification and any product warranty from that manufacturer. We do not offer an additional warranty; our commitment is to install to the certified schedule. How long does a fire-rated grille last? + The certified life of the product provided the grille is not damaged, painted over or removed. Grilles found in poor condition on inspection are repaired or replaced. Can a grille be retrofitted into an existing fire door? + Yes, provided the doorset's certification allows a grille of that size and location. If it doesn't, the aperture invalidates the doorset — the doorset itself may need to be replaced instead. Do you install in occupied buildings? + Yes — most installations are in occupied residential and commercial premises. Can grilles be installed in walls and ceilings as well as doors? + Yes — the certified system depends on the substrate and rating of the element the grille penetrates. Do you supply the grille or just install? + Both — grilles are supplied from certified manufacturers only, and installed to that manufacturer's schedule. Which areas do you cover? + London, Kent, Sussex, Surrey and surrounding boroughs including Croydon, Sutton, Bromley, Sevenoaks and Crawley. ## Get a fixed quotation for fire-rated air transfer grille installation. Send the FRA action list, drawings or a short scope description. You'll speak to Michael directly — not a call centre — and get a scoped, priced programme back. [07400 436839](tel:+447400436839)[Contact page](/contact) Delivered by Michael Sully — 5 years' passive fire experience. BM TRADA third-party certification held via Sully Form Ltd. Insured to £10M employers' / £5M public liability. ## Ready to scope your fire-rated air transfer grille installation works? Send the FRA or a short brief. You'll get a priced, evidenced programme back — not a template quotation. [Request Estimate](/contact) [07400 436839](tel:+447400436839) ![Flame Solutions Ltd](/__l5e/assets-v1/8937fb61-d54f-4b77-aea7-a3f11a843ae3/flame-solutions-logo.png) Certified passive fire protection — fire doors, fire stopping and compartmentation — led by BM TRADA third-party certified specialist Michael Sully. [07400 436839](tel:+447400436839) [flamesolutionsltd@gmail.com](mailto:flamesolutionsltd@gmail.com) 6 Byron Avenue, Coulsdon, CR5 2JR Monday – Saturday: 7:00am – 7:00pm [](https://www.instagram.com/flamesolutionsltd/) Services - [Certified Fire Door Installation](/services/fire-door-installation) - [Fire Door Maintenance & Repairs](/services/fire-door-maintenance-repairs) - [Fire Stopping Services](/services/fire-stopping) - [Compartmentation](/services/compartmentation) - [Fire Door Surveys](/services/fire-door-surveys) - [FRA Passive Fire Repairs](/services/fra-passive-fire-repairs) - [Service Penetration Fire Sealing](/services/service-penetration-fire-sealing) - [Linear Gap & Joint Fire Sealing](/services/linear-gap-joint-fire-sealing) - [Fire-Rated Air Transfer Grille Installation](/services/fire-rated-air-transfer-grille-installation) Service Areas - [London](/areas/london) - [Kent](/areas/kent) - [Sussex](/areas/sussex) - [Croydon](/areas/croydon) - [Surrey](/areas/surrey) - [Sutton](/areas/sutton) - [Bromley](/areas/bromley) - [Sevenoaks](/areas/sevenoaks) - [Crawley](/areas/crawley) Company - [About](/about) - [Our Work](/our-work) - [Reviews](/reviews) - [Contact](/contact) - [Privacy Policy](/privacy-policy) - [Terms & Conditions](/terms-conditions) - [Cookie Policy](/cookie-policy) © 2026 Flame Solutions Ltd. Company registered in England & Wales. BM TRADA, Constructionline Silver, SafeContractor and SIPS credentials are held by Michael Sully, registered under our associated company Sully Form Ltd. No warranty is offered. [Call](tel:+447400436839)[Request Estimate](/contact)