Hertfordshire · Ductwork cleaning
Ductwork Cleaning in Harpenden
Ductwork cleaning for businesses, landlords and public buildings in Harpenden. CHAS, SafeContractor and ISO 9001, and fully insured.
- Hardened, baked-on grease in long horizontal runs
- Heavy grease at the base of a riser
- Duct runs with no cleaning record
Your questions about ductwork cleaning in Harpenden
Which environmental health team covers Harpenden?
Kitchens in Harpenden are inspected by St Albans City council’s environmental health officers. Ratings are published by the Food Standards Agency, so a clean extract and good records are worth keeping up.
Do you clean school canteen extracts around Harpenden out of term?
Yes. Half-terms and the summer break are the natural time for school work. Food Standards Agency records list about 10 schools, colleges and universities with registered kitchens within about a mile and a half of Harpenden. Tell us your holiday dates and we will book the visit for when the site is empty.
What’s TR19?
TR19® is BESA’s specification for ventilation hygiene. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, while TR19® Air covers other supply and extract ductwork.
How often does extract ductwork need cleaning?
The duct is cleaned as part of the whole system, at intervals set by BESA guidance, from every 3 months for heavy use to every 12 months for light use. Grease thickness testing shows whether that’s often enough.
When is the ductwork cleaned?
When the kitchen is closed. Long ducts can be split across visits, with the kitchen ready to cook each morning.
How is kitchen extract ductwork cleaned?
We open each access panel and clean the section it reaches. Grease is scraped out first, then degreased, with readings taken before and after.
Do you offer maintenance contracts?
Yes. We run scheduled maintenance contracts, with visits at the interval your system needs. Each report recommends when the next visit should be.
What paperwork do you give after a duct clean?
Readings, pictures and, for a full clean, a TR19 certificate. It also gives a recommended next clean date.
Ductwork cleaning in Harpenden, done properly
Not sure when the ductwork was last cleaned? Tell us about the system when you give us a ring on 0345 646 2711 or use the quote form, and a fixed price will follow, normally within one working day. The work covers multi-storey ducts, access panels and vertical risers, and people most often call us about heavy grease at the base of a riser and high readings at a recent grease test.
Many kitchens in a town like Harpenden were fitted into buildings built for something else, so duct runs can be awkward, with bends, long horizontal sections and too few access panels. Where the duct can’t be reached, new panels can be fitted, and anything left uncleaned is recorded on the report.
Nothing is signed off by word of mouth: a dated report with pictures of the work, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Place
- Harpenden (AL5)
- Wider area
- Hertfordshire
- Records
- Certificate and photo report
- Quotes
- Fixed quote, typically within a working day
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
For landlords and multi-site operators
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.
Multi-site operators often want one contractor and one number. We cover South East England and London, so visits at different addresses can be planned together and kept to a regular schedule.
Signs you need ductwork cleaning in Harpenden
Wherever the kitchen is, in Harpenden or elsewhere, the duct fills in the same way: hours of cooking, the type of food and how well the filters are kept. Under BESA guidance, the minimum interval is 3, 6 or 12 months, by daily cooking hours.
Signs it’s time to call us include:
- Gaps where access panels were never fitted
- An insurer asking for TR19 evidence
- A rancid smell from the extract duct
- Readings above 200 microns from a grease thickness test
Term dates shape school work: for a school like Harpenden Academy, an extract clean fits neatly into a half-term or summer break.
What to look for in a quote
- Whether a survey comes first
- When the next visit should be, and why
- Whether the quote shows VAT
- How areas they cannot reach will be recorded
Towns and villages near Harpenden
What else we do in Harpenden
Ductwork cleaning around Harpenden
Food Standards Agency data counts about 62 restaurants, cafés and works canteens and about 13 takeaways and sandwich shops across Harpenden and its immediate surroundings (about a mile and a half). Where they cook under a canopy, grease doesn’t stop at the filters: it settles along the duct and up the riser. Kitchens in Harpenden get their food hygiene inspections from St Albans City council. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. Our report lists what was cleaned and when, which is useful to have ready. Fire safety in Harpenden falls to Hertfordshire Fire and Rescue Service. The Fire Safety Order puts the duty on whoever runs a kitchen to control its fire risk, and a greasy duct is fuel.
A kitchen near Harpenden station that serves breakfast and dinner can run its extract twelve hours or more, which shortens the cleaning interval. A hall kitchen that only cooks for events, whether near St Nicholas Church or elsewhere in Harpenden, still needs its extract cleaned, just less often.
Harpenden is about 6 miles north-east of Hemel Hempstead, in Hertfordshire. We provide ductwork cleaning for businesses, landlords and public buildings in Harpenden and the rest of Hertfordshire. 381 places in Hertfordshire are on our list, large and small. Milton Keynes is in our area too, about 23 miles from Harpenden.
Every address in AL5 is covered for ductwork cleaning, from busy streets to back roads. Whether your site is on Station Road, High Street and Connaught Road or a nearby road, our technicians can take on the work. You’ll find Harpenden on the B652 and B653, which makes it straightforward for our technicians to reach for out-of-hours visits. Other places close to Harpenden include Batford (1 mile north-east), Lea Valley (1 mile east), Bower Heath (1 mile north), Mackerye End (1 mile north-east) and The Folly (2 miles east). Within a short drive, we also cover Watford (11 miles south), Hemel Hempstead (6 miles south-west), Stevenage (10 miles north-east), St Albans (5 miles south), Welwyn Garden City (7 miles east) and Hitchin (10 miles north). Harpenden is among the bigger places we cover in Hertfordshire for ductwork cleaning.
Local landmarks in Harpenden
Locally, jobs take us to businesses close to Lydekker Park, The Junction pub and Sir John Lawes School. There’s a railway station in Harpenden itself: Harpenden station. Well-known places in the area include Harpenden Museum (within half a mile south-west) and Luton Castle (5 miles north-west). For a walk, there’s Wheathampstead Local Nature Reserve and Verulamium Lake.
Why it’s worth doing now in Harpenden
A partly blocked duct slows the airflow. Less air moves, so heat and smoke stay in the kitchen while the fan strains and grease can drip from duct joints. An inspector or insurer will want to see recent records, so it makes sense to have them ready.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, which can make the next visit longer. If you’re not sure what’s needed, phone us on 0345 646 2711 or drop us a line for straight advice and a fixed quote.
Why us?
- Fully insured
- One contact for all your sites in London and the South East
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Accredited under CHAS and SafeContractor, with ISO 9001
What staff can safely do
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but the parts you can’t see still need a specialist at the right interval.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We will take a look and give you a fixed quote.
What happens on the day
Our technicians bring everything the work needs, including protection sheets, the right tools and access kit. You only need to give us clear access and switch off what needs to be off. On site, the work takes anything from a few hours to several visits, depending on the length of duct. Sites in a town like Harpenden rarely need to lose trading hours, as the work fits around them.
- We start by working out how the duct runs and where it can be opened.
- Set points along the runs are tested for grease.
- Access panels are opened and heavy deposits scraped out by hand.
- Next the ducts and risers are degreased, using whatever suits the deposit.
- Readings and photos are repeated and any section we couldn’t reach is recorded.
Preparing for the visit
- Let us know about permits to work or site inductions
- Clear the space around the work
- Make sure someone can let us in and lock up afterwards
Ask for a quote
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.
Advice
How the job changes from site to site
Bends and transitions
The join where the canopy meets the duct is a common hotspot. We reach it from the plenum side where possible.
Access panels
Every section of duct is cleaned through an access panel. Where there are none, those sections cannot be cleaned and the report has to say so.
What a clean won’t put right
An honest diagnosis matters more to us than a booking, so here’s what ductwork cleaning won’t do:
- Ductwork that was poorly designed
- A damper stuck open in the duct
- Sections that cannot be reached safely without new access (those are recorded, and panels can be fitted)
Not sure which it is? You can call 0345 646 2711 or send us an email and we will tell you honestly before you book.
Where we work
- Vertical risers
- Attenuators
- Bends and junctions
- Access panels
- Multi-storey ducts
- Horizontal duct runs