TR19 kitchen-extract cleaning removes the grease that builds up inside a commercial kitchen's extract ductwork — a serious fire risk and an insurance requirement. Optus Glean UK cleans extract systems to the TR19 Grease standard, verifies the result with deposit-thickness testing, and issues before/after photos and a hygiene certificate for your records.
What TR19 is
TR19 is the building-engineering industry's recognised standard for the internal cleanliness of ventilation systems, published by BESA and endorsed by UK insurers. It was split into TR19 Grease (for kitchen-extract fire safety) and TR19 Air (for general ventilation hygiene).
The grease threshold and why it matters
Under TR19 Grease, grease deposits inside extract ductwork should not exceed a mean average of 200 microns between scheduled cleans, and areas at 500 microns or more require immediate spot cleaning. Grease is highly flammable, so an uncleaned extract system is a genuine fire risk — and insurers increasingly require documented TR19 compliance, with claims potentially denied after a fire where a system was not properly cleaned.
How we clean and verify
We install access panels (typically every 2–3 metres) so the full run of ductwork can be reached, clean the canopy, filters, ductwork, and fan, and verify the result with Deposit Thickness Tests (DTT) or Wet Film Thickness Tests (WFTT) at multiple points. Work is carried out and signed off in line with the BESA Grease Hygiene Technician standard.
Your compliance record
After every clean you receive a report with before-and-after photographs, DTT/WFTT results, a summary of the work, and a hygiene certificate stating the cleaning frequency achieved — the documented due-diligence evidence your insurer and fire risk assessment need.