EN1366.co.uk is a practical UK guidance website focused on fire-resisting ventilation ductwork, smoke extract ductwork and the interfaces that make complete smoke-control systems work.
What this website is for
The site explains commonly misunderstood subjects in plain English: choosing the relevant standards route, checking classifications and evidence, coordinating ductwork with fans and dampers, and identifying information that should be resolved before pricing, manufacture or installation.
It does not reproduce British or European Standards and it is not a substitute for purchasing and reading the current documents.
Who operates EN1366.co.uk
EN1366.co.uk is operated by DuctFix. Practical experience in ductwork manufacture, supply, installation and project coordination informs the questions covered by the site. This commercial relationship is stated openly, but guidance pages are written to help readers understand the technical route before choosing a supplier.
Our editorial approach
- Guidance is written as an original practical summary, not copied from standards.
- Source material may include purchased standards, official government guidance, recognised industry publications and manufacturer test or assessment evidence.
- Project-specific limitations are highlighted where a general statement could be misleading.
- Pages are reviewed when new source material, corrected information or revised editions become available.
- Commercial products are not treated as interchangeable unless the relevant evidence permits it.
Technical responsibility
EN1366.co.uk can help contractors, consultants and clients understand ductwork scope and missing information. It does not replace the fire strategy author, fire engineer, smoke-control designer, project consultant, manufacturer evidence, approving authority or commissioning specialist.
The required classification, duration, operating sequence and acceptance route must be confirmed from the project fire strategy, specification, cause-and-effect matrix and applicable evidence.
Corrections and review
Technical guidance benefits from scrutiny. If you believe a page is unclear, out of date or incorrect, please email sales@ductfix.co.uk with the page link and supporting source. Substantive corrections will be reviewed and incorporated where appropriate.
Editorial review date: 20 September 2026.