Hertfordshire · Ductwork cleaning
Ductwork Cleaning in Dudswell
For ductwork cleaning in Dudswell, one call is all it takes, from survey to sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- High readings at a recent grease test
- A duct nobody has opened in years
- Thick crusts of old grease along the duct
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. Once we’re in, the area is sheeted and anything that has to be off is turned off and cooled, and the work takes a shift or more, depending on the length of the runs and the number of access points. Seeing the system in pictures first means the trip to Dudswell can be planned properly.
- Diagnosis: a survey of the duct’s route, size and access.
- You get a fixed price before work starts.
- Each section is cleaned in turn through its access panel.
- We take extra care at bends and at the foot of risers.
- The duct is signed off with readings, pictures and a next clean date.
Before we arrive
- Tell us about site rules, permits or sign-in
- Tell us the best time to work, such as after service or at a weekend
- Find the previous report, if there is one
Getting a quote
To get a fixed quote, call 0345 646 2711 or use the quote form with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. You will normally have a quote within one working day.
Advice
About our ductwork cleaning in Dudswell
The ductwork is where an extract clean is won or lost. Sections with no way in can go uncleaned for years. Each section we can reach is cleaned, and any we can’t is written down, so you know exactly where you stand. The work covers vertical risers, attenuators and multi-storey ducts, and common reasons people get in touch are duct runs with no cleaning record and an insurer asking for TR19 evidence.
In a small place like Dudswell, kitchens are often in older or extended buildings, with long single-storey duct runs, where grease settles in the flat sections. Access, parking and timings are agreed before the day.
Insurers, fire officers and environmental health officers all look at records. That’s why every job is written up in a report with pictures, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Location
- Dudswell (HP4)
- Region
- Hertfordshire
- Reporting
- Certificate and photo report
- Price
- A fixed price before work begins
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Looking after it afterwards
Once we’ve finished, these simple steps help:
- Ask for a grease thickness test if the kitchen gets busier
- Don’t switch the extract off early
- Leave a way through to the access panels
- Tell us if grease leaks from the ductwork
File the paperwork in the maintenance log. An insurer, fire officer or EHO may ask to see it, and the photos make the duct’s condition easy to see.
Run the extract the whole time the kitchen is cooking. When the air stops, grease settles in the duct, so switching off early adds to the build-up.
Grease, kitchens and Dudswell
Food Standards Agency data counts about 7 cafés, restaurants and staff canteens across Dudswell and its immediate surroundings (about a mile and a half). Wherever those kitchens cook under a canopy, the horizontal runs and risers need cleaning as well as the hood. Kitchens in Dudswell get their food hygiene inspections from Dacorum council. A greasy canopy or dripping filters are the sort of thing an inspection can pick up. A TR19® certificate and photo report after each clean gives you a record to show an inspector. Hertfordshire Fire and Rescue Service covers Dudswell. Fire and rescue authorities enforce the Fire Safety Order in most non-domestic premises, and in a kitchen that fire risk includes the grease in the extract.
If you run catering at a healthcare site, such as a hospital like Hemel Hempstead Hospital about 5.9 miles east, the extract may need cleaning more often than a part-time kitchen. 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.
Dudswell is about 2 miles north-west of Berkhamsted, in Hertfordshire. We provide ductwork cleaning for businesses, landlords and public buildings in Dudswell and the rest of Hertfordshire. 381 places in Hertfordshire are on our list, large and small. For sites nearby, see our Milton Keynes page (19 miles or so).
Every address in HP4 is covered for ductwork cleaning, from busy streets to back roads. You’ll find streets such as Pea Lane, Tring Road and Wharf Lane, and we cover them all for ductwork cleaning. We also cover the places around Dudswell: 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). Further out, we also cover 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).
Around Dudswell
Typical jobs here are in premises near Ashlyns School and The Artisan at The Cow Roast Inn. The nearest railway station is Tring station, about 1.9 miles north-west of the centre. Other landmarks nearby include Hemel Hempstead Hospital (5.9 miles east) and Hawridge Court (2.6 miles south-west). Open spaces near Dudswell include College Lake nature reserve and Pavis Wood.
What happens if it’s left?
BESA guidance says grease shouldn’t exceed a mean of 200 microns between cleans. Anywhere that reaches 500 microns or more needs immediate spot cleaning. Putting off the clean only pushes readings higher. It’s worth booking a check, because nobody sees inside a duct day to day.
No two sites are the same, so we price each one individually. Size, access, the condition of the system and when we can work all make a difference.
Why Dudswell businesses choose us
- Work around your opening hours, with 24/7 emergency cover
- A single point of contact for sites across the South East and London
- Accredited under CHAS and SafeContractor, with ISO 9001
- Fixed quotes, typically within one working day
Part by part
Attenuators and discharge
Near the discharge, the air has cooled the most, so it can collect more grease than expected. We include it in the clean and the readings.
Vertical risers
Risers are cleaned through panels at different levels. Where it can’t be reached safely, the report says so.
What we are called out for in Dudswell
Wherever the kitchen is, in Dudswell or elsewhere, the duct fills in the same way: daily cooking hours, the menu and the state of the filters. Under BESA guidance, the minimum interval is 3, 6 or 12 months, by daily cooking hours.
Most sites get in touch after spotting one of these:
- Thick crusts of old grease along the duct
- A rancid smell from the extract duct
- Duct runs that can’t be reached
- Thick deposits at the bottom of a vertical duct
If you look after a school kitchen, at a school such as St Mary's CofE Primary School or anywhere near Dudswell, the holidays are the usual time for a TR19® clean.
What your quote should include
- What’s included in the scope, part by part
- Whether the price is fixed
- Proof of insurance
- Whether a written report and pictures are included
Fixed quotes for ductwork cleaning in Dudswell
Every site gets its own quote. This is what makes a difference:
- One-off work versus a regular cycle
- Site requirements such as sign-in and permits
- Whether we need access equipment or extra panels
- Travel, parking and unloading
What you pay reflects the actual work. That is why every job is surveyed first, and why the quote is fixed before we start.
What to send for a quote
Many jobs can be priced from photos and some basics. Useful things to send:
- The paperwork from the last visit, if you have it
- How we’d reach plant on a roof or in a plant room
- A few general shots of the system
- Problems your staff have spotted
If you need ductwork cleaning in Dudswell, phone us on 0345 646 2711 or use the quote form. Let us know the site type and the opening hours, and send pictures or your last report if you can. A fixed quote usually follows within one working day.
Your questions about ductwork cleaning in Dudswell
Which fire authority looks after Dudswell?
Fire safety enforcement in Dudswell is handled by Hertfordshire Fire and Rescue Service. It’s worth keeping your fire risk assessment, TR19® certificates and photo reports together, ready to show.
Do you do school kitchen extract cleaning in Dudswell in the summer holidays?
Yes, and it’s the easiest time to do it. With about 6 schools and colleges on the FSA’s register within roughly a mile and a half of Dudswell, it pays to plan holiday dates ahead. Booking early in the term gives the best choice of holiday dates.
Which accreditations do you hold?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we are fully insured.
Which kinds of sites do you work on?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, plus food production and leisure sites.
What information do you need?
Some photos and a quick description of the system, with the address and opening hours. If we need more, we’ll ask.
Can you look after several sites?
Yes. We work across South East England and London, so sites at different addresses can be planned together as one programme. Each site gets its own report and photos.
How do you know if the ductwork needs cleaning?
We measure it. Using a Wet Film Thickness Test or Deposit Thickness Test, we check the grease at set points. BESA guidance says the mean shouldn’t exceed 200 microns, and 500 or more anywhere needs immediate spot cleaning.
Can you clean ductwork with no access panels?
Any section we can’t reach is recorded on the report, as TR19 expects. New panels can be fitted to reach them in future.
Towns and villages near Dudswell
Also in Dudswell
Honest limits
We’d rather tell you now than book work that will not help, so here are the limits:
- Duct sections that need replacing
- Sections that can’t be reached safely without new access (those are recorded, and panels can be fitted)
- A worn-out fan that needs replacing
If you are not sure, just call 0345 646 2711 or use the quote form and we will give you a straight answer before booking.
What the work covers
- Vertical risers
- Multi-storey ducts
- Access panels
- Horizontal duct runs
- Attenuators
- Bends and junctions