Hertfordshire · Ductwork cleaning
Duct cleaning in Throcking
Cleaning of kitchen extract ductwork, horizontal runs and vertical risers through access panels for Throcking, with a survey first and a report with photos at the end. Ask us for a fixed quote.
- Stale grease odours from the duct
- Duct runs that can’t be reached
- A duct nobody has opened in years
Ductwork cleaning in Throcking, done properly
Each extract duct we take on in Throcking goes through the full routine: we test the grease first, remove thick deposits by hand and degrease what’s left. Readings are taken again afterwards and photos go into your report. If you have an insurer asking for TR19 evidence and a grease test showing the duct is overdue, we can put it right, from multi-storey ducts, horizontal duct runs and attenuators onwards.
For a kitchen in or near Throcking, 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 to discharge, then a TR19® certificate and a photo report.
Every visit ends with a written report and pictures, so there’s a dated record of the work. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Where
- Throcking (SG9)
- Wider area
- Hertfordshire
- Paperwork
- TR19® certificate and photo report
- Price
- Fixed quote, typically within a working day
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Different parts, different methods
Access panels
Extra panels can be installed where there are gaps, making future cleans more complete. The survey shows where they’re needed.
Attenuators and discharge
Near the discharge, the air has cooled the most, which can mean heavier deposits. It’s tested and cleaned along with the rest.
Also in Throcking
Multi-site and managed buildings
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.
We also work for facilities teams across offices, schools and healthcare across Hertfordshire. Larger estates can be phased building by building around the people who use them.
What happens if it’s left?
BESA guidance says grease shouldn’t exceed a mean of 200 microns between cleans. A reading of 500 microns or more at any point means a spot clean straight away. Leaving the duct makes those limits harder to keep to. With notice, the visit to Throcking 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 book with us
- A fixed price before any work starts
- We diagnose before we treat
- A written report with pictures after each visit
- CHAS and SafeContractor accredited, with ISO 9001
Take a look at how cleaning jobs are priced or how to check a contractor.
Grease, kitchens and Throcking
We cover Throcking, about 31 miles from central London, as part of our work across London and the South East. Visits are booked around your hours, evenings and weekends included. Food hygiene inspections in Throcking are the job of East Hertfordshire council’s environmental health team. Extraction counts as kitchen equipment, so its condition can come up on the day. Keeping each certificate and photo report on file helps show the extract is looked after.
Volunteers running a hall kitchen near Holy Trinity Church, or anywhere in Throcking, may not know when the extract was last cleaned, and a grease test settles it.
Throcking is about 6 miles north-east of Stevenage, in Hertfordshire. Wherever you are in the SG9 postcode area, we cover ductwork cleaning for commercial sites. Our Hertfordshire coverage runs to 381 places, and Throcking is one of them. We also work in Chelmsford, around 28 miles away.
All of SG9 is within our area for ductwork cleaning, from busy streets to back roads. If your site is just outside Throcking, we cover Cottered (1 mile south-west), Chipping (1 mile north-east), Buntingford (2 miles east), Aspenden (2 miles south-east) and Layston (2 miles east). Further out, we also cover Stevenage (6 miles south-west), Bishop's Stortford (11 miles south-east), Welwyn Garden City (12 miles south-west), Hitchin (9 miles west), Hoddesdon (14 miles south) and Hatfield (15 miles south-west).
Near you in Throcking
Nearby you will also find Clothall Castle (4.1 miles west). Green spaces nearby include Hawkins Wood.
What ductwork cleaning can’t fix
Ductwork cleaning can’t fix everything, and we will tell you before we start. It doesn’t solve:
- A failed fan motor at the end of the duct (a fan repair job)
- Sections that can’t be reached safely without new access (those are recorded, and panels can be fitted)
- Ductwork that was poorly designed
If in doubt, give us a ring on 0345 646 2711 or send us an email and we will say what we think before booking.
What we work on in Throcking
- Multi-storey ducts
- Access panels
- Attenuators
- Vertical risers
- Horizontal duct runs
- Bends and junctions
Signs you need ductwork cleaning in Throcking
Air cools as it moves away from the canopy. As it cools, the grease it carries condenses onto the duct walls, which is why ducts go on gathering grease well beyond the filters.
These are the problems we see most often:
- A duct clean needed for an insurer
- Ductwork that has never been cleaned
- Readings above 200 microns from a grease thickness test
- Stale grease odours from the duct
Bursars and site managers at schools such as Freman College tend to book extract cleaning for when the kitchen is empty.
Comparing quotes
- What happens if part of the system can’t be accessed
- Whether a survey comes first
- What records you will receive afterwards
- Whether they recommend a next date
Aftercare tips
No system stays clean for ever, but care slows the build-up. Our tips:
- Book the next clean before the recommended date
- Ask us about extra access panels where sections cannot be reached
- Do not block access panels with shelving or stock
- Report any grease dripping from duct joints
Keep the certificate and report with the fire risk assessment. It’s the evidence an insurer or inspector may ask for, and the photos make the duct’s condition easy to see.
Extra access panels mean more of the duct gets cleaned each time. Grease you can reach is grease that gets removed.
Throcking questions
Which environmental health team covers Throcking?
That is East Hertfordshire council, whose environmental health officers carry out food hygiene inspections in Throcking. It helps to keep the extract cleaning records with your food safety paperwork, so they’re ready if asked for.
Can a school canteen extract in Throcking be done out of term time?
Yes, out-of-term visits are normal for schools. Around Throcking, the Food Standards Agency lists about 2 schools and colleges with registered kitchens within a mile and a half or so. Tell us your holiday dates and we will book the visit for when the site is empty.
How often should kitchen ducts be cleaned?
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. Readings tell you if it needs to be more often.
Do you install duct access panels?
Yes, we fit access panels where the duct needs them. That lets the next clean reach sections that were missed, and the report will show where they’re needed.
Is there a survey before the work?
Yes. For many sites, pictures and a few details are enough, while bigger or harder-to-see systems are surveyed on site.
What paperwork do you give after a duct clean?
Every clean comes with a photo report, plus a TR19 certificate when the whole system is cleaned. Keep both in the maintenance log.
Is a quote from pictures possible?
Yes, if we can see what we need. Otherwise, we book a survey at a time that suits the site, and the quote follows that.
How long does it take to clean extract ducts?
Duct length, access and grease levels all affect it. Typically it takes anything from a few hours to several visits, depending on the length of duct.
How the visit works
We start by comparing what we find with the survey or your photos. If anything is different, we talk it through with the person on site before carrying on. From there, it takes a few hours for a short run, longer for long runs and tall risers. Somewhere like Throcking, lanes, gates and parking are worth mentioning in advance.
- We map the duct route and check where the access panels are.
- 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.
- Post-clean readings and pictures go into the report, with any unreachable section listed.
Getting ready for the visit
- Tell us the best time to work, such as after service or at a weekend
- Let us know about permits to work or site inductions
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Get a fixed quote
The quickest way to a quote is to send photos: the system from a couple of angles, plus any access panels or hatches. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.