Bushey · TR19 Grease
We clean the full commercial duct run - grease, dry and laundry ductwork, canopy to roof fan - for kitchens, offices and industrial sites across Bushey, and certify it to the TR19 Grease standard your insurer expects.
Bushey
Bushey rates hundreds of food premises, and behind a large share sits an extract duct a canopy clean never reaches - plus the dry ductwork and air-handling that keep its offices and public buildings running.
Right across Bushey, from Sparrows Herne through Bushey Hall Road to Oxhey, cooklines share tight roof space and vent through concealed ducting few operators ever see inside. We clean that entire path to the TR19 Grease standard, canopy through to fan, taking in the level pulls and the risers where grease settles thickest and a fire would run.
The same crews clean dry ventilation and air-handling ductwork in offices, schools and civic buildings, plus the combustible lint runs behind hotel and care-home dryers. High-turnover sites - school refectories, care-home kitchens, pub and restaurant kitchens and the busy parade takeaways - build grease fastest in the concealed lengths where flame spreads.
The standard
TR19 Grease is the benchmark Bushey insurers and fire risk assessors expect - measured across the whole extract run, not just the visible mouth of the canopy.
Grease is measured by thickness, and the standard sets the depth at which a system must be cleaned and re-tested. Around Sparrows Herne and Oxhey, where the concealed runs thread through mixed roof voids, a canopy-and-filter wipe leaves the ductwork itself - the long hidden sections where grease accumulates and a fire travels - untouched. We access the full Bushey run through existing and newly fitted inspection hatches, clean to bare metal, record before-and-after grease-depth readings at set points, and issue a TR19 Grease certificate with a post-clean depth record.
By system
The fire risk. Fried-food extract coats duct walls in combustible grease; cleaned canopy to fan and certified to TR19 Grease.
Supply and general extract in offices and public buildings, carrying dust and debris that throttles airflow and loads the air-handling unit; cleaned to TR19.
The hidden one. Tumble-dryer ducting packs with lint - highly combustible - in Bushey hotels, care homes and gyms.
On the ground in Bushey
We are in Bushey's ductwork and plant every week. The proof is the jobs, not the stock photos.
Carbonised grease coated the grease extract duct from the canopy to the first bend at a busy pub kitchen in Bushey. We installed inspection hatches along the run, hand-scraped the carbon and degreased through to the fan. The ductwork was cleaned to bare metal and passed TR19, signed off with a certificate. We scheduled it for a Sunday while the dining room was closed.
When it is due
Ductwork rarely warns you politely. In a busy Bushey kitchen these are the tells.
Watch for steam that hangs in the room, cooking smells creeping back over the tables, a canopy weeping onto a Sparrows Herne line, grease crusting at the filter rims, or a Bushey insurer or fire assessor calling for a TR19 certificate you do not hold. How often it needs doing rides on the cooking load - a hard-frying Bushey Hall Road kitchen far more than a quiet daytime cafe - and the certificate fixes that interval, so the next clean is planned, not chanced.
How it runs
Inspect the full Bushey run, find the access gaps in the concealed sections, agree scope and frequency.
Fit inspection hatches where the run is sealed - common in the older Oxhey conversions - and protect the kitchen.
Canopy to roof fan, down to bare metal, with before-and-after grease-depth evidence.
TR19 Grease certificate, grease-depth record and next-due date for your Bushey fire logbook.
Why it matters
Three duties push every Bushey operator to keep ductwork clean, and they reinforce one another.
Fire safety law. Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person for a Bushey premises must assess and manage fire risk. A grease-laden duct is one of the most serious risks in any catering building, because a flare-up on a Sparrows Herne cookline can travel the ductwork and spread fire through concealed voids. The Health and Safety at Work etc. Act 1974 and the HSE reinforce the same duty of care.
Insurance. A live TR19 Grease certificate is what a Bushey insurer treats as evidence the system is maintained. Miss it and a fire claim may be reduced or refused - an expensive surprise once the damage is done.
Hygiene and environmental health. Food hygiene inspections by Hertsmere Borough Council take in the condition of the building, ventilation included, so a grease-laden system can cost you on the rating an Environmental Health Officer awards - never mind the smell and the dropping extraction your kitchen team works under.
It is set by cooking hours under TR19 Grease - roughly every three months for heavy use of 12 to 16 hours a day, every six for moderate, every twelve for light. A hard-frying Sparrows Herne kitchen sits in a tighter band than a daytime Bushey Hall Road cafe. We measure the grease load and confirm your interval.
Yes. We clean the dry ductwork and air-handling in Bushey offices, schools and public buildings, and the lint-heavy laundry ducts in the Hertfordshire hotels and care homes, alongside kitchen grease ducts.
Yes. The fan at the top of an Oxhey or city-centre riser is where grease throws off the blades and the run ends - we degrease it and its housing, because a loaded fan is what finally stops a system pulling.
We fit compliant access panels where the ductwork has none, so every internal section can be reached, cleaned, inspected and certified - common in the older Oxhey conversions where the run was boxed in with no hatches.
Little, if it is planned. We survey the Bushey run first, agree a slot overnight or on a close day, sheet off the kitchen and clean section by section, so a Bushey Hall Road cookline is back in service for the next shift.
Yes - from Sparrows Herne and Bushey Hall Road kitchens to the offices, schools and industrial units across Bushey and the wider Hertfordshire.
The full run, canopy through the concealed horizontal and vertical ductwork to the roof fan - the hidden sections a canopy-only clean leaves loaded, which matters in the tight stock around Sparrows Herne and Oxhey where the runs are long and awkward.
Local knowledge
When Herkomer extended his converted chapel in 1912, the daylight glass house he built became a film studio - said to be the earliest surviving film studio in England - lit entirely through its glazed roof. A century on, Bushey's premises hide their air inside sealed ductwork instead of open glass, where grease and debris build unseen until airflow fails or fire finds a path. We clean and inspect ventilation and extract ductwork across the town, then hand over photographic before-and-after evidence of every run. What the old studios did in plain daylight, modern buildings do in the dark of a duct.
Phoenix Duct Clean · by the numbers
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