Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Little Gaddesden, Hertfordshire
Our technicians work in Little Gaddesden on cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Fixed quotes, work around your opening hours and photo reports on every job.
- Dirty coils holding back the airflow
- Condensate trays that will not empty
- Dust built up on fan impellers
Aftercare tips
How long the results last depends on use and care. We suggest:
- Report stiff or damaged access doors
- Don’t store bins or materials near the intake
- Look at the condensate drain whenever the unit is serviced
- Store the TR19 paperwork where auditors can find it
You receive a TR19® certificate and a photo report after the clean. They belong in the plant or maintenance log.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
How we handle AHU cleaning in Little Gaddesden
Heating and cooling coils trap dust that gets past the filters. A coated coil restricts airflow and makes the unit work harder. We clean coils with methods suited to their condition, taking care not to damage the fins. The work covers supply and extract fans, filter sections and internal panels, and people most often call us about odours coming through the supply air and fan sections that haven’t been cleaned in years.
Work in a small place like Little Gaddesden starts with agreeing access and timings.
Nothing is signed off by word of mouth: a dated report with pictures of the work, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. It shows what was done and what, if anything, couldn’t be reached.
- Place
- Little Gaddesden (HP4)
- Wider area
- Hertfordshire
- Records
- Photo report after every visit
- Price
- Fixed quote, normally within a working day
- Hours
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- 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 around the people who use them.
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We’re happy to deal with either side, and the report can go to both.
What staff can safely do
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. That’s our job.
Signs you need AHU cleaning in Little Gaddesden
Most units live out of sight on roofs, in plant rooms or in ceiling voids and are rarely seen by anyone but maintenance staff. It’s easy for a long time to go by without anyone opening the panels.
What we’re most often called out for:
- Debris and leaves in the fresh air intake
- Units needing a clean before a new tenant or handover
- Air handling units with blocked filters
- Units that have only ever had filter changes
Around Little Gaddesden, as anywhere, ventilation cleaning begins with an inspection.
Comparing quotes
- Whether the work can be done while the site is closed
- Whether they’re fully insured
- Whether they recommend a next date
- Whether the quote is based on a survey or pictures
Little Gaddesden questions
Can you come to Little Gaddesden after we close?
Yes, nights and weekends are routine for us. Your customers, staff or residents in Little Gaddesden needn’t be disturbed. When you ring 0345 646 2711 or use the quote form, mention when the site is quiet.
Is Little Gaddesden within the area you cover?
Yes, Little Gaddesden is part of our area, however small the site. The journey is planned ahead, so a few details about the route help.
Do you have a 24/7 line?
Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, and the emergency line covers the rest.
Is there a report after cleaning?
Yes. You get a TR19® certificate plus before and after pictures. They’re worth keeping with the plant records.
Can you price the work without visiting?
Usually, yes. Send a few wide photos plus close-ups of panels, filters or grilles, and we typically come back within one working day. Some sites still need a visit, and we will say so.
What is TR19?
TR19® is the BESA specification for keeping ventilation systems clean. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
How much does AHU cleaning cost?
There’s no set price, as it depends on the job: how big it is, what state it’s in, how we reach it and the working hours. You get a fixed price before we start.
Is there a survey before the work?
Yes. Every job is surveyed first, from your photos and details, or with a visit where necessary. Then you get a fixed quote.
How the visit works
Our technicians bring everything the work needs, from protective sheeting to tools and access equipment. All we need from you is clear access and the right equipment switched off. On site, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. For a village or hamlet like Little Gaddesden, tell us about narrow lanes, gates and parking when you book.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
Before we arrive
- Tell us the best time to work, such as after service or at a weekend
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Let us know about permits to work or site inductions
How to get a quote
For a fixed quote, ring 0345 646 2711, or send details by email and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. You’ll usually have a quote within one working day.
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What the work involves, part by part
Drain trays
Standing water in a tray sits right where the air passes. We clean it and note if the slope or the drain needs attention.
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. The coil and its drain tray are cleaned as one job.
Also near Little Gaddesden
What else we do in Little Gaddesden
What AHU cleaning cannot fix
We will always give you a straight diagnosis, so here’s what AHU cleaning will not do:
- Ductwork downstream of the unit, which is a separate clean
- Mechanical faults with motors, belts or bearings
- Leaking heating or cooling coils
If in doubt, call us on 0345 646 2711 or email us and we will say what we think.
Parts of the system we cover
- Supply and extract fans
- Dampers and louvres
- Internal panels
- Heating and cooling coils
- Filter sections
- Drain trays
What AHU cleaning looks like in Little Gaddesden
Going by the FSA’s register, there are about 3 schools, colleges and universities serving food in and around Little Gaddesden, up to about a mile and a half out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. The nearest hospital to Little Gaddesden is Hemel Hempstead Hospital, about 5.6 miles south-east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. We cover Little Gaddesden, about 29 miles from central London, as part of our work across London and the South East. A survey and a fixed quote come first, then the visit at a time that suits you.
Hospitals such as Hemel Hempstead Hospital (about 5.6 miles south-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Little Gaddesden are no different.
Little Gaddesden is about 4 miles north of Berkhamsted, in Hertfordshire. Whatever kind of site you run in Little Gaddesden, we can take on AHU cleaning. Visits can be booked for evenings, overnight or weekends so the site keeps running. Our area takes in 381 places across Hertfordshire, from busy centres to quieter spots. There’s also a page for Milton Keynes, roughly 18 miles from Little Gaddesden.
Every address in HP4 is within our area for AHU cleaning, from busy streets to back roads. Whether your site is on Church Road, Bede Court and Gatesdene Close or anywhere close by, our technicians can take on the work. Other places close to Little Gaddesden include Hudnall (1 mile south-east), Ringshall (1 mile north-west), Hudnall Corner (1 mile east) and Dagnall (2 miles north). We also work in nearby towns such as Watford (12 miles south-east), Hemel Hempstead (6 miles south-east), St Albans (11 miles south-east), Harpenden (9 miles east), Hitchin (15 miles north-east) and Hatfield (14 miles east).
Local landmarks in Little Gaddesden
The closest station to Little Gaddesden is Tring station, about 2.9 miles west. Nearby you’ll also find Pitstone Green Museum (3.9 miles west) and Hemel Hempstead Hospital (5.6 miles south-east). The countryside around Little Gaddesden includes Sallowsprings and Ivinghoe Beacon.