Hertfordshire · TR19 inspections and grease testing
TR19 Inspection in Nup End Green
One call covers TR19 inspection in Nup End Green, from survey to sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Post-clean verification after another contractor’s clean
- Ductwork where grease may be over the TR19 limits
- Insurers asking for TR19 evidence
In-house cleaning or a specialist?
Keep a record of what your team does. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, next to our reports.
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but they don’t reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
About our TR19 inspection in Nup End Green
BESA sets minimum cleaning intervals by daily use: every 3 months for heavy use of 12 to 16 hours a day, every 6 months for moderate use of 6 to 12 hours, and every 12 months for light use of 2 to 6 hours. Grease testing shows whether your kitchen needs cleaning more often than that. If you have an insurer’s request for a TR19 audit and extracts that have never been grease tested, we can help, from pre-clean surveys, insurer audits and wet film thickness tests onwards.
For a kitchen in or near Nup End Green, the visit is planned around opening hours and the journey, and the clean itself is the same full TR19® job as in any town: canopy, filters, duct, fan and discharge, with a certificate and photo report at the end.
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’ve been trading since 2009.
- Place
- Nup End Green (SG3)
- Region
- Hertfordshire
- Records
- TR19® certificate and photo report
- Quote
- Fixed quote, normally within a working day
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Common questions in Nup End Green
Which fire and rescue service is responsible for Nup End Green?
Fire safety enforcement in Nup End Green is handled by Hertfordshire Fire and Rescue Service. A recent cleaning certificate and a note of the next clean date show that grease in the extract is being managed.
Which council inspects kitchens in Nup End Green?
The local authority for Nup End Green is North Hertfordshire council, and its environmental health team does the inspecting. It helps to keep the extract cleaning records with your food safety paperwork, so they’re ready if asked for.
How much does TR19 inspection cost?
It depends on the site, so we quote each one individually. For a quote, ring 0345 646 2711 or drop us a line with the site type, opening hours and a few pictures.
What happens on a pre-clean survey?
It’s a look at the whole extract before it’s cleaned, with readings and pictures. We can work from pictures and details, or visit, as suits the job.
What do you do to protect the area?
We start with protection: sheeting over floors, worktops and anything close to the work. We tidy up and take our waste away before we leave.
What does TR19 mean?
BESA’s ventilation hygiene specification, with two parts that matter most here: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It isn’t legislation, but it’s the standard people check against.
Is Nup End Green in your area?
Yes. We work across Greater London, Surrey, Kent, Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, Nup End Green included.
Can you quote from pictures?
Yes, for many jobs. Send a few wide pictures plus close-ups of panels, filters or grilles, and a fixed quote typically follows within one working day. If photos are not enough, we will survey first.
What happens if it’s left?
Skipping grease testing leaves the cleaning interval to guesswork. Any reading of 500 microns or more needs immediate spot cleaning under TR19® Grease, and you can only act on that if you’ve measured it. With notice, the visit to Nup End Green can be fitted around your bookings and events.
What you pay reflects the actual work. That’s why every job is surveyed first, and why the quote is fixed before any work starts.
Why choose Duct Doctor in Nup End Green
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- One contact for all your sites in London and the South East
- Survey first, then a fixed quote
- Ventilation hygiene specialists since 2009
Take a look at how cleaning jobs are priced and our accreditations.
TR19 inspection around Nup End Green
Look up Nup End Green on the FSA’s food hygiene register and you will find about 3 restaurants, cafés and canteens within roughly a mile and a half of the centre of Nup End Green. Kitchens like these cook for very different hours, and grease testing shows which extracts need cleaning soonest. It’s North Hertfordshire council that sends environmental health officers to food businesses in Nup End Green. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. Before-and-after pictures from each clean are a simple way to show the extract is in hand. The fire and rescue service for Nup End Green is Hertfordshire Fire and Rescue Service. Grease in a kitchen extract is a recognised fire risk, and the fire authority enforces the law on managing it in most commercial premises.
Healthcare kitchens cannot easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Nup End Green is Lister Hospital, about 4.1 miles north. Church and community hall kitchens, near Church of St Mary and St Thomas or anywhere around Nup End Green, are easy to forget, but their extracts collect grease like any other.
Nup End Green is about 3 miles south-west of Stevenage, in Hertfordshire. Every kind of commercial site in Nup End Green, TR19 inspection is something we can help with. Visits can be booked for evenings, overnight or weekends so the site keeps running. 381 places in Hertfordshire are on our list, large and small. There’s also a page for London, roughly 26 miles from Nup End Green.
Work in SG3 is surveyed, quoted and booked the same way as anywhere else. Nearby, we also carry out TR19 inspection in Driver's End (1 mile west), Old Knebworth (1 mile north-east), Rableyheath (1 mile south-east), Pottersheath (1 mile south-east) and Codicote (1 mile south-west). Further out, we also cover Hemel Hempstead (13 miles south-west), Stevenage (3 miles north-east), St Albans (9 miles south-west), Welwyn Garden City (5 miles south), Harpenden (6 miles south-west) and Hitchin (6 miles north).
Near you in Nup End Green
Locally, jobs take us to businesses close to Robin Hood And Little John Public House and Knebworth Park. For rail, the closest station is Knebworth station, roughly 1.4 miles east of the centre. A little further out are Benington Castle (4.9 miles north-east) and Lister Hospital (4.1 miles north). For a walk, there’s Mardley Heath.
Aftercare tips
So the system stays in good health:
- Keep canopy edges and gutters wiped down
- Report grease dripping from the canopy
- Diary the next grease test and clean
- Keep TR19 certificates, readings and reports together
You get a report with the grease readings, where they were taken and pictures of each point. Keep it with your fire safety and TR19 records.
Keep filters clean and in place. Gaps around filters let grease get past them.
Places near Nup End Green
Also in Nup End Green
How the visit works
On the day, we arrive at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool first, and the area around the work is covered and protected. The work itself takes a morning or less for one kitchen, more where there are several systems. Visits to a village like Nup End Green are booked in advance, at a time that suits whoever runs the site.
- The visit is arranged for when the kitchen isn’t busy.
- Every part of the system is examined, end to end.
- Grease thickness is measured at set points by WFTT or DTT.
- Photos are taken at each point, and access gaps noted.
- We send a report setting out the readings, photos and next steps.
Getting ready for the visit
- Mention any locked doors, roof access or ceiling voids
- Move anything stored near the system
- Make sure equipment near the work can be switched off and left to cool
How to get a quote
Getting a quote does not take long. Send a few details and pictures, and we usually reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
Read more
What we are called out for in Nup End Green
Grease in a duct is flammable fuel. A flare-up on the range can be drawn into the canopy and duct, and from there a fire can spread through the ductwork. Measuring it is the first step to keeping it under control.
Look out for any of the following:
- Post-clean verification after another contractor’s clean
- Insurers asking for TR19 evidence
- Kitchens whose menu or hours have changed
- Kitchens taken over with no cleaning records
If your kitchen is in a listed or historic building, like the houses around Nup End Green (Knebworth House is about 0.6 miles north-east), fitting access panels needs care.
What to look for in a quote
- Whether the quote is based on a survey or pictures
- What hours they’ll be on site
- What happens if part of the system can’t be accessed
- Proof of insurance
Different parts, different methods
Extract fan and discharge
Grease builds up on the fan blades and inside the housing. They’re included in the readings and pictures.
Canopy and plenum
Clean-looking filters don’t mean a clean plenum. That’s why we test behind them.
What a clean will not put right
We’ll always give you a straight diagnosis, so here’s what TR19 inspection will not do:
- Fan breakdowns, which need a repair visit
- The responsible person’s own fire risk assessment
- Sections with no access, until panels are fitted
Not sure which it is? You can call us on 0345 646 2711, or email photos and we’ll tell you honestly.
What we work on in Nup End Green
- Insurer audits
- Pre-clean surveys
- Deposit thickness tests
- Post-clean checks
- Access surveys
- Wet film thickness tests