Hertfordshire · Ductwork cleaning
Duct cleaning in Chiswell Green
Ductwork cleaning in Chiswell Green from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Thick deposits at the bottom of a vertical duct
- Duct runs with no cleaning record
- Years of grease along the duct floor
Honest limits
In fairness, there are a few things this work won’t fix:
- Fire dampers that do not close (they need testing and remedials)
- 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)
If in doubt, phone us on 0345 646 2711 or email us and we will say what we think before you book.
Where we work
- Attenuators
- Horizontal duct runs
- Access panels
- Bends and junctions
- Vertical risers
- Multi-storey ducts
About our ductwork cleaning in Chiswell Green
We treat ductwork like a doctor treats arteries: find the blockages, clear them, then check the flow is right. Readings taken before and after show the difference, alongside before and after photos. Typical jobs include grease leaking from duct joints and a duct nobody has opened in years, on horizontal duct runs, attenuators and multi-storey ducts.
Kitchens around a place like Chiswell Green are often in older buildings or single-storey extensions, with the duct running through a roof space or up an outside wall. Flat runs collect grease and need proper access to clean.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we’re fully insured. On top of that, we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, trading since 2009.
- Place
- Chiswell Green (AL2)
- Region
- Hertfordshire
- Reporting
- TR19® certificate and photo report
- Quote
- A fixed quote up front
- When we work
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
For landlords and multi-site operators
Facilities teams in offices, schools and healthcare sites book us too across Hertfordshire. Larger estates can be phased building by building to keep disruption down.
Running several sites is easier with one contractor. We cover South East England and London, so a run of sites can go into one programme and kept on a regular cycle.
FAQs for Chiswell Green
Do you cover smaller places like Chiswell Green?
Yes. Villages and rural sites across the South East are part of our work, Chiswell Green included. Just mention lanes, gates or anything else about the site when you book.
Who carries out food hygiene inspections in Chiswell Green?
The local authority for Chiswell Green is St Albans City 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.
Do you have a 24/7 line?
Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, with the emergency line covering every other hour.
What does TR19 mean?
A BESA specification in two main parts: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It isn’t legislation, but it’s the standard people check against.
Can extra access doors be added to the duct?
Yes, we do. We’ll point out where panels are needed, and fitting them means future cleans are more complete.
What happens if you cannot reach some of it?
They’re marked on the report. Often the fix is extra access, such as new panels in ductwork, and we can fit those.
How long will the duct clean take?
It depends on the length of the duct, the number of access panels and how much grease there is. Typically it takes a few hours for a short run, longer for long runs and tall risers.
Which sectors do you work in?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, as well as food production and leisure sites.
Nearby places to Chiswell Green
More services for Chiswell Green
Why act early in Chiswell Green
Grease narrows the duct and slows the air. The fan works harder, the kitchen gets hotter and smoke lingers at the canopy, and grease may start to leak from joints. It’s easy to lose track of when the work was last done on a quieter site.
When the work has to happen, how we reach it and how big the site is all affect the cost. Each of those is built into the quote, and the price is fixed before any work starts.
Why Chiswell Green businesses choose us
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Fixed quotes, typically within one working day
- One contact for all your sites in London and the South East
- Photo reports with every job
Read our cost guide or how to check a contractor.
In-house cleaning or a specialist?
A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. That is our job.
Staff cleaning doesn’t replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Kitchen extracts in Chiswell Green
The FSA’s food hygiene register includes about 7 bars, pubs and nightclubs within 1.5 miles or so of the middle of Chiswell Green. A pub or hotel kitchen that cooks every day builds up grease in its extract like any other. Environmental health officers from St Albans City council inspect food businesses in Chiswell Green. They look at how clean the premises and equipment are, and the kitchen extract is part of that. Our report lists what was cleaned and when, which is useful to have ready. The fire and rescue service for Chiswell 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 can’t easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Chiswell Green is Napsbury Hospital, about 2.1 miles east. Where a hall near St. Stephen's Church, or anywhere in Chiswell Green, hosts lunch clubs or events, its extract gathers grease just as a café’s does. For schools such as Killigrew Primary and Nursery School, kitchen extract cleaning is normally booked for the holidays, when the canteen is closed.
Chiswell Green is about 2 miles south-west of St Albans, in Hertfordshire. Whatever kind of site you run in Chiswell Green, ductwork cleaning is something we can help with. Visits can be booked for evenings, overnight or weekends so trading isn’t interrupted. Chiswell Green is one of 381 towns, villages and districts in Hertfordshire we cover for commercial clients. London is in our area too, about 19 miles from Chiswell Green.
Postcode districts we cover here for ductwork cleaning: AL2. Streets in the area include Watford Road, Rosedene End and Hammers Gate, and we cover them all for ductwork cleaning. You’ll find Chiswell Green on the B4630, so it’s easy for us to get to for out-of-hours visits. We also cover How Wood (1 mile south-east), Park Street (1 mile east), St Stephens (1 mile north-east), Frogmore (1 mile south-east) and Sopwell (1 mile north-east). Further out, we also cover Watford (5 miles south), Hemel Hempstead (5 miles west), Stevenage (15 miles north-east), Welwyn Garden City (9 miles north-east), Harpenden (6 miles north) and Hoddesdon (15 miles east).
Local landmarks in Chiswell Green
We work in commercial kitchens and buildings around Three Hammers Public House, Verulamium Park and Marlborough Science Academy and the streets around them. The nearest railway station is Park Street station, roughly 0.8 miles east of the centre. Nearby you will also find Hypocaust Museum (1.5 miles north) and Napsbury Hospital (2.1 miles east). Not far away are Verulamium Lake and Grebe House Wildlife Garden.
Between visits
Think of this as the after-treatment advice, short and simple:
- Report any grease dripping from duct joints
- Consider fitting panels where the report shows gaps
- Don’t block access panels with shelving or stock
- Ask for a grease thickness test if the kitchen gets busier
You’ll have a recommended date for the next clean, worked out from the grease we found and how long you cook each day, in line with BESA guidance.
Keep the fan on throughout service. When the air stops, grease settles in the duct, so switching off early adds to the build-up.
What affects the cost of ductwork cleaning
A fixed price needs a few facts first. We look at:
- Any permits to work or inductions
- Whether it’s a one-off visit or part of a schedule
- Whether we need access equipment or extra panels
- Travel, parking and unloading
Combining work into one visit or one programme can make for a more efficient booking. Tell us about everything you’d like looked at, and you will get one fixed quote.
Asking for a quote
There’s no need for technical detail. It helps if you can send:
- Your last certificate, test record or report
- Detail shots of panels, filters and grilles
- A few general shots of the system
- Problems your staff have spotted
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, the quote is fixed before any work is booked.
How the visit works
Every visit runs to the same pattern: sheeting and protection first, make the system safe, do the work, tidy up and hand over the paperwork. The visit itself takes a shift or more, depending on the length of the runs and the number of access points. In a place like Chiswell Green, we fit the visit around your hours.
- We trace the duct and find every way in.
- We take grease readings along the route.
- Out of hours, the area is protected and the access panels opened.
- Heavy deposits come out by hand, then each section is degreased.
- Panels are closed, readings and photos repeated, and unreachable sections recorded.
Before we arrive
- Clear loose items from the work area
- Plan for cooking equipment or plant to be off before we arrive
- Mention any locked doors, roof access or ceiling voids
Get a fixed quote
There’s no standard price list, because no two systems are the same. Instead, we look at your site first, from photos or a survey, and then send you a fixed quote. To get going, call us on 0345 646 2711, or email photos.