Potters Bar · 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 Potters Bar, and certify it to the TR19 Grease standard your insurer expects.
Potters Bar
Potters Bar 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.
The city's kitchens sit in tight, mixed stock - Darkes Lane, The Walk, Little Heath - with long concealed duct runs up to roof fans. We clean the full run to the TR19 Grease standard, canopy to fan, including the horizontal and vertical sections a canopy-only clean leaves coated.
Kitchens are only half the work - we also strip the dry supply and extract ductwork of Potters Bar schools, offices and civic buildings, and the lint-choked dryer runs behind its hotels and care homes. It is the hardest-pressed kitchens - the town-centre takeaways, pub and hotel kitchens, care-home and school caterers and the office staff restaurants - that glaze their hidden ducting quickest, and that coating is the road a fire takes.
The standard
TR19 Grease is the benchmark Potters Bar insurers and fire risk assessors expect - measured across the whole extract run, not just the visible mouth of the canopy.
The standard works in grease-film thickness, fixing the depth at which a run must be cleaned and re-tested. In the shared roof voids around Darkes Lane and Little Heath, wiping the canopy and filters leaves the ductwork - the long concealed sections that gather grease and carry fire - untouched. We open the full Potters Bar run through existing and newly cut inspection hatches, strip it to bare metal, log grease-depth readings at fixed points before and after, and issue a TR19 Grease certificate with the post-clean depths recorded.
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 Potters Bar hotels, care homes and gyms.
On the ground in Potters Bar
We are in Potters Bar's ductwork and plant every week. The proof is the jobs, not the stock photos.
An independent office suite in Potters Bar had dust and debris built up in the branch ducts feeding the rooms, giving off a dusty smell whenever the system ran. I power-brushed the supply ductwork under HEPA negative pressure and cleared out the supply grilles. Clean supply air was restored, and I left the area tidy and ready to use. Booking it on a bank holiday, when the practice was closed, kept it clear of working hours.
When it is due
Ductwork rarely warns you politely. In a busy Potters Bar kitchen these are the tells.
A canopy dripping onto a Darkes Lane cookline, cooking smells forced back to the tables, extraction that no longer clears the steam, grease showing at the filter edges, or a Potters Bar insurer or fire risk assessor wanting a TR19 certificate you have not got. How often it needs doing follows how hard you cook - a fast-frying The Walk kitchen far more than a daytime cafe - and the certificate names the interval, so the next visit is booked, not guessed.
How it runs
Inspect the full Potters Bar 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 Little Heath 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 Potters Bar fire logbook.
Why it matters
Three duties push every Potters Bar 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 Potters Bar 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 Darkes Lane 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 current TR19 Grease certificate is the evidence your Potters Bar insurer expects. Without it, a fire claim can be reduced or refused outright - an expensive gap to find after the event.
Hygiene and environmental health. A food hygiene visit from Hertsmere Borough Council weighs the physical state of the premises, ventilation counted within it. A grease-blocked extract can pull down the rating an Environmental Health Officer sets, quite apart from the stale smell and the tired airflow your staff work beneath all shift.
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 Darkes Lane kitchen sits in a tighter band than a daytime The Walk cafe. We measure the grease load and confirm your interval.
Yes - from Darkes Lane and The Walk kitchens to the offices, schools and industrial units across Potters Bar and the wider Hertfordshire.
Little, if it is planned. We survey the Potters Bar run first, agree a slot overnight or on a close day, sheet off the kitchen and clean section by section, so a The Walk cookline is back in service for the next shift.
Yes. We work overnight, early mornings and closing days for the Darkes Lane and The Walk kitchens, and around shift patterns at commercial and production sites, at no extra charge for out-of-hours work.
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 Little Heath conversions where the run was boxed in with no hatches.
A dated TR19 certificate, before-and-after photographs of each section, and an access report for your fire logbook - the evidence a Darkes Lane operator's insurer and fire risk assessor expect.
Yes. We clean the dry ductwork and air-handling in Potters Bar offices, schools and public buildings, and the lint-heavy laundry ducts in the Hertfordshire hotels and care homes, alongside kitchen grease ducts.
Local knowledge
The railway that made Potters Bar a commuter town also gave it its industry, and the units of the Cranborne Industrial Estate still run tight against the East Coast Main Line where the 1850 track was laid. Modern premises hide their dust and grease inside sealed ductwork rather than open mill air, and it builds unseen until airflow drops or fire finds a path along a run. We clean and inspect ventilation and extract ductwork across the town's estates and kitchens, working from access hatch to access hatch. Every job is handed over with photographic before-and-after evidence of each length cleaned.
Phoenix Duct Clean · by the numbers
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