Hertfordshire · TR19 inspections and grease testing
Dudswell TR19 inspection
TR19 inspection in Dudswell from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- An insurer’s request for a TR19 audit
- Checking the result of a recent clean
- Extracts that have never been grease tested
How we handle TR19 inspection in Dudswell
BESA sets minimum cleaning intervals by daily use: heavy use (12 to 16 hours a day) every 3 months, moderate use (6 to 12 hours) every 6 months and light use (2 to 6 hours) every 12 months. Grease testing shows whether your kitchen needs cleaning more often than that. If you have insurers asking for TR19 evidence and parts of the system left out of past cleans, we can put it right.
Somewhere as small as Dudswell, commercial kitchens are few: perhaps a pub, a school or care home kitchen, or a hall used for events. Each still has a canopy and duct that collect grease, whatever the size of the place.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we’re fully insured. On top of that, we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we have been trading since 2009.
- Place
- Dudswell (HP4)
- Region
- Hertfordshire
- Reporting
- Certificate and photo report
- Price
- Fixed quote, typically within a working day
- Working hours
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Landlords, agents and facilities managers
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. With shared responsibility, good records help everyone.
From a single site to a large estate, the standard is the same: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
Questions from Dudswell
Do you clean school canteen extracts around Dudswell out of term?
Yes. Half-terms and the summer break are the natural time for school work. Food Standards Agency records list about 6 schools, colleges and universities with registered kitchens within about a mile and a half of Dudswell. Send us your term dates when you phone us on 0345 646 2711 or use the quote form, and we will fit the work in.
Do you work in villages like Dudswell?
Yes. Dudswell is within the area we cover across London and the South East. The journey is planned ahead, so a few details about the route help.
Do you survey before quoting?
Yes. We always survey first, from your photos and details, or with a visit where needed. Then you get a fixed quote.
Can you set up regular visits?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. Each report recommends when the next visit should be.
What is TR19?
A BESA specification in two main parts: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It is not law, but it’s the benchmark.
What information do you need?
Just the basics: the address, the site type, your opening hours and how we reach the system. Photos and the last report help too. After that, simply phone us on 0345 646 2711 or email us.
What does a pre-clean survey involve?
We survey, measure and photograph the system first. The survey can be done from photos and details or on site, whichever suits the system.
What happens if you can’t reach some of it?
We never leave them off the paperwork. You’ll know exactly which parts weren’t reached and why, and we can quote to improve the access.
What TR19 inspection looks like in Dudswell
There are about 7 cafés, restaurants and staff canteens within about 1.5 miles of central Dudswell, according to the Food Standards Agency’s register. Where they cook under a canopy, a grease reading is the way to tell whether the extract is due a clean. Fire safety in Dudswell falls to Hertfordshire Fire and Rescue Service. In most workplaces, including commercial kitchens, it’s the fire and rescue authority that enforces the Fire Safety Order. Environmental health officers from Dacorum council inspect food businesses in Dudswell. A greasy canopy or dripping filters are the sort of thing an inspection can pick up. A dated certificate in the maintenance file answers the question before it’s asked.
Older buildings often hide long, awkward duct runs, and if you run a kitchen at a historic venue in the area (Cholesbury Manor House is about 2.7 miles south-west), access may need planning. For schools such as St Mary's CofE Primary School, kitchen extract cleaning is normally booked for the holidays, when the canteen is closed.
Dudswell is about 2 miles north-west of Berkhamsted, in Hertfordshire. Anywhere in HP4, we cover TR19 inspection for commercial sites. Across Hertfordshire, we cover 381 places, and Dudswell is one of them. For sites nearby, see our Milton Keynes page (19 miles or so).
We cover every part of the HP4 postcode area for TR19 inspection and the streets around it. TR19 inspection is available to premises on Pea Lane, Tring Road and Wharf Lane and nearby roads. Other places close to Dudswell include Cow Roast (1 mile north-west), Wigginton (2 miles west), Heath End (2 miles south-west), Hawridge (2 miles south-west) and Cholesbury (3 miles south-west). Larger places within reach include Watford (12 miles south-east), Hemel Hempstead (6 miles east), St Albans (12 miles east), Harpenden (11 miles east), Bushey (14 miles south-east) and Rickmansworth (11 miles south-east).
Landmarks near Dudswell
In Dudswell, that means kitchens and buildings near Ashlyns School and The Artisan at The Cow Roast Inn and the streets around them. Dudswell’s nearest station is Tring station, about 1.9 miles north-west of the centre. Well-known places in the area include Hemel Hempstead Hospital (5.9 miles east) and Hawridge Court (2.6 miles south-west). The countryside around Dudswell includes College Lake nature reserve and Pavis Wood.
Different parts, different methods
Horizontal duct runs
Sections without access are recorded so panels can be added.
Canopy and plenum
Clean-looking filters don’t mean a clean plenum. That is why we test behind them.
What a clean won’t put right
Before you book, it helps to know what’s not included:
- Installation problems, which fall under design guidance such as DW172
- Parts of the duct nobody can reach yet
- Removing the grease, which is a separate clean
If you’re not sure, just phone us on 0345 646 2711 or use the quote form and we will give you a straight answer.
Where we work
- Wet film thickness tests
- Deposit thickness tests
- Access surveys
- Post-clean checks
- Pre-clean surveys
- Insurer audits
Leave it or put it right?
Surveying first means the clean goes to plan. Access problems are spotted in advance rather than on the night, and the quote reflects the real job. Systems in rural buildings are often out of sight and out of mind.
Working hours, access and the scale of the site all affect the cost. We take each of them into account and give you a fixed price before we start.
Why choose Duct Doctor in Dudswell
- A fixed price before any work starts
- A single point of contact for sites across the South East and London
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A written report with pictures after every visit
Read what affects the cost and our accreditations.
What happens on the day
We work around your opening hours, not the other way round. We book the visit for a time the area is closed, whether that’s an evening, overnight or a weekend. When the team arrives, the work area is protected and the relevant equipment is switched off to cool, and the job takes a morning or less for one kitchen, more where there are several systems. If the van will struggle with a lane or gateway near Dudswell, let us know and we will plan around it.
- We agree a time when the kitchen is closed or quiet.
- We look over the canopy, plenum, ducts, fan and discharge.
- Grease thickness is measured at set points by WFTT or DTT.
- Each test point and any access problems are photographed.
- The findings go into a report with readings, pictures and a recommended next clean.
Preparing for the visit
- Let us know about parking and loading
- Name a contact who can let us in at the agreed time
- Let us know about permits to work or site inductions
Ask for a quote
We do not publish a price list, because no two systems are the same. We look at your system first, from pictures or on a visit, and then give you a fixed quote. To start, call 0345 646 2711, or email photos.
Related advice
Between visits
A little care between visits keeps the system in better shape. Our advice:
- Keep the route to access panels clear
- Book the next test on the date in the report
- Clean or swap grease filters as often as the kitchen needs
- Report grease dripping from the canopy
Any access problems we found are listed with a suggested fix. Fitting them before the next clean means the whole system gets done.
When cooking hours or the menu change, check the interval still fits. Fresh readings show whether it needs to change.
Common problems we fix in Dudswell
TR19® is the benchmark that insurers, fire officers and EHOs refer to. It is not legislation; the legal duty comes from the Fire Safety Order 2005, under which the responsible person must reduce fire risk, and grease in the extract is part of that risk.
The symptoms we’re asked about most include:
- Systems cleaned on a calendar with no measurements
- Post-clean verification after another contractor’s clean
- Heavy grease suspected in the plenum or ducts
- Insurers asking for TR19 evidence
Church and community hall kitchens, near Church of Saint Mary or anywhere around Dudswell, are easy to forget, but their extracts collect grease like any other.
Questions to ask before booking
- When the next visit should be, and why
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- What happens if part of the system cannot be accessed
- What’s included in the scope, part by part