Dronfield · 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 Dronfield, and certify it to the TR19 Grease standard your insurer expects.
Dronfield
Dronfield 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 Dronfield, from Snape Hill through Gosforth Valley to Callywhite Lane, 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.
Beyond the kitchens, we clean the dry ductwork and air-handling in offices, schools and public buildings, and the lint-heavy laundry ducts in hotels and care homes. High-output kitchens - the bakery and food-factory kitchens, care-home and school kitchens, pub kitchens and the town-centre takeaways - lay grease down fast in exactly the concealed sections where a fire travels.
The standard
TR19 Grease is the benchmark Dronfield insurers and fire risk assessors expect - measured across the whole extract run, not just the visible mouth of the canopy.
Because the standard is written around film thickness, it sets the depth that triggers a clean and re-test. In the mixed roof spaces around Snape Hill and Callywhite Lane, a canopy-and-filter wipe leaves the duct interior - where grease piles up and a fire runs - completely alone. We reach the whole Dronfield run through existing hatches and new ones we cut, clean back to bright metal, take before-and-after grease-depth figures at set points, and certify it to TR19 Grease with those depths on the 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 Dronfield hotels, care homes and gyms.
On the ground in Dronfield
We are in Dronfield's ductwork and plant every week. The proof is the jobs, not the stock photos.
Fine grey dust had accumulated in the branch ducts feeding the main rooms of a long-established community centre in Dronfield, leaving the air barely moving. We worked the branch supply ducts over with brushes and HEPA extraction, then cleaned and refitted the ceiling diffusers. The rooms felt fresher and the stale, dusty smell had gone, with everything back together before opening. The site's office cat kept a close eye on us from the doorway.
When it is due
Ductwork rarely warns you politely. In a busy Dronfield kitchen these are the tells.
The tells are plain: steam that lingers, odours drifting back over the diners, drips off the canopy onto a Snape Hill line, a rim of grease at the filters, or a Dronfield insurer or fire assessment wanting a TR19 certificate you cannot show. Frequency tracks the cooking load - a hard-frying Gosforth Valley kitchen needs it far more often than a quiet cafe - and your certificate sets the date, so nothing is left to chance.
How it runs
Inspect the full Dronfield 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 Callywhite Lane 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 Dronfield fire logbook.
Why it matters
Three duties push every Dronfield 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 Dronfield 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 Snape Hill 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 Dronfield 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 North East Derbyshire District 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 Snape Hill kitchen sits in a tighter band than a daytime Gosforth Valley cafe. We measure the grease load and confirm your interval.
Yes. We clean the dry ductwork and air-handling in Dronfield offices, schools and public buildings, and the lint-heavy laundry ducts in the Derbyshire hotels and care homes, alongside kitchen grease ducts.
Yes - from Snape Hill and Gosforth Valley kitchens to the offices, schools and industrial units across Dronfield and the wider Derbyshire.
Yes. We work overnight, early mornings and closing days for the Snape Hill and Gosforth Valley 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 Callywhite Lane 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 Snape Hill operator's insurer and fire risk assessor expect.
Yes. The fan at the top of a Callywhite Lane 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.
Local knowledge
Long before the rail plant arrived, the River Drone drove the water-wheels of Dronfield's scythe and edge-tool works, and firms like Ward, Camm and Siddall at the Damstead Works on Mill Lane cut spindles and fliers in air thick with grinding dust. Modern premises hide their dust and grease inside sealed ductwork instead, where it builds unseen until airflow fails or fire finds a path. We clean and inspect ventilation and extract ductwork across the town, from the Callywhite Lane units to the bakery lines that feed the retailers. Every job ends with photographic before-and-after evidence of each run.
Phoenix Duct Clean · by the numbers
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