Dirty ductwork is a genuine fire risk and an air quality problem. We clean and verify your ventilation systems to BESA's TR19® specification — the UK's recognised standard for ventilation hygiene.
TR19® is the industry standard published by the Building Engineering Services Association, setting out how ventilation systems should be cleaned, inspected and reported on. In March 2026, BESA updated TR19® Air to make post-clean reporting mandatory — meaning your compliance paperwork now needs to prove the job was done to standard, not just that it was done.
We survey your ductwork and grade its condition using TR19®'s internal cleanliness scale before any work begins.
Mechanical brushing and vacuum extraction removes dust, debris and contamination from the full duct run, not just accessible sections.
Photographic and swab-tested evidence confirms the system meets TR19®'s cleanliness threshold, with a full compliance report.
This depends on the building type and how heavily the ventilation system is used, but most commercial systems should be assessed at least every 1-2 years, with kitchen extract systems typically requiring more frequent cleaning.
BESA introduced mandatory post-clean reporting, meaning contractors must now provide verified evidence that a clean meets the required cleanliness standard, not just a certificate confirming the work took place.
Yes. Dust and debris build-up in ductwork can fuel fire spread and reduce the effectiveness of fire dampers and other fire safety systems within the ventilation network.
In most cases yes — we plan work around operational hours and can section off areas of a system to keep the rest running.
Free 15-minute call about your ventilation system — a TR19® survey can follow for a flat fee, credited back if you instruct us.
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