Surrey · Air handling unit cleaning
Air handling unit cleaning in Coldharbour, Surrey
Specialist AHU cleaning for Coldharbour: diagnosis first, then a fixed quote, the work and a report with pictures. Ask us for a fixed quote.
- Filters that are clogged or overdue
- Leaves and litter drawn into the unit
- Plant that has been serviced but not cleaned
AHU cleaning in Coldharbour
Where a building in Coldharbour has had little more than filter changes, there may be dirt on the coils, fan and casing that nobody has looked at. A full clean deals with all of it. The work covers supply and extract fans, dampers and louvres and internal panels, and the jobs we see most are rooms that smell stuffy when the system runs and air handling units due a clean after building work.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
The paperwork matters as much as the work. Each visit is written up with pictures, listing what was done, anything we couldn’t reach and when the next visit is due. File it in your maintenance log so it’s ready for an insurer, fire officer or EHO.
- Place
- Coldharbour (RH5)
- Wider area
- Surrey
- Records
- Written report with pictures
- Quotes
- A fixed price before we start
- When we work
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
The process
We are used to working while the site is closed. A lot of visits happen overnight or at weekends, so the site can open as normal afterwards. On site, the work takes anything from half a day for one small unit to several shifts for a plant room full of them. If you can send pictures, we can arrive in Coldharbour knowing what to expect.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- We arrange the shutdown with your staff and sheet the area.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- You get a TR19® certificate and a photo report.
Getting ready for the visit
- Allow time for equipment near the work to be turned off and cool down
- Clear loose items from the work area
- Let us know about parking and loading
Get a fixed quote
The quickest way to a quote is to send photos: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
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What happens if it’s left?
A clean unit feeds cleaner air into the ductwork, so the whole system stays cleaner for longer. It also means the next inspection has less to find. It’s simpler to plan the work at Coldharbour now than to arrange it in a hurry later.
Every site is different, so each one gets its own fixed quote. The size of the job, how we reach it, its condition and the working hours all play a part.
Why Coldharbour businesses choose us
- One contact for all your sites in London and the South East
- Accredited under CHAS and SafeContractor, with ISO 9001
- Trading since 2009
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
Aftercare tips
So the system stays in good health:
- Make sure condensate is draining away
- Do not store bins or materials near the intake
- Keep the certificate and photo report with the plant records
- Do not ignore odours coming through the grilles
The ducts served by the unit may need attention too. Cleaning the unit and ducts together gives the best result, and we can survey both.
Keep the unit’s doors and panels in working order. Sections that are awkward to open are the ones that get skipped.
Towns and villages near Coldharbour
Also in Coldharbour
Fixed quotes for AHU cleaning in Coldharbour
You’ll get a fixed price before any work starts. It’s based on:
- One-off work versus a regular cycle
- Where the site is and how we reach it
- The condition of the system
- Working hours and out-of-hours timing
The cost depends on how big the system is, the condition it’s in and access to every part of it. We give you a fixed price before work begins, so there are no surprises.
Helping us quote
We can often survey from pictures. Try to include:
- Your last certificate, test record or report
- Detail shots of panels, filters and grilles
- The times we could work without disrupting the site
- Photos showing the whole system and its surroundings
Quotes are quick. Call or email with a few details and you’ll typically have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
FAQs for Coldharbour
Do you work in villages like Coldharbour?
Yes, Coldharbour is part of our area, however small the site. Let us know about access, parking and anything unusual about getting there when you book.
Can you come to Coldharbour after we close?
Yes, evening, overnight and weekend work is normal for us. That way a site in Coldharbour does not have to lose a day’s trading. Tell us your opening hours when you ask for a quote.
Do you give a certificate after the clean?
Yes. You get a TR19® certificate plus before and after pictures. Keep them in the maintenance log.
Where does the waste go?
It’s contained and taken away. We collect grease, debris and waste water as we go rather than letting it spread.
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, while TR19® Air covers other supply and extract ductwork.
How much does AHU cleaning cost?
Every site is different, so each gets its own fixed quote. For a quote, phone us on 0345 646 2711 or email us with the site type, opening hours and a few photos.
Can you look after several sites?
Yes. One number covers all your sites in our area, and visits can be set on a regular cycle.
Can you clean the ducts connected to the AHU?
Yes, the ductwork, grilles and diffusers the unit serves. We’ll tell you after the survey whether the ducts need it.
What AHU cleaning looks like in Coldharbour
Coldharbour is about 25 miles from central London, well within the area we cover across London and the South East. The visit is fixed around your opening hours, not ours.
Around Coldharbour, an air handling unit’s drain tray is checked for standing water as a matter of course. Around Coldharbour, as anywhere, ventilation cleaning begins with an inspection.
Coldharbour is about 4 miles south of Dorking, in Surrey. From the centre of Coldharbour to the outskirts, we cover AHU cleaning for every kind of premises, from a single unit to a large public building. Coldharbour is one of 395 towns, villages and districts in Surrey we cover for commercial clients. There’s also a page for Guildford, roughly 10 miles from Coldharbour.
Here we cover the RH5 postcode area for AHU cleaning. We also cover the places around Coldharbour: Abinger Bottom (2 miles north-west), South Holmwood (2 miles north-east), Holmwood Corner (2 miles east), Friday Street (2 miles north-west) and Beare Green (2 miles east). We also work in nearby towns such as Guildford (10 miles north-west), Woking (13 miles north-west), Epsom (11 miles north), Horley (8 miles east), Redhill (9 miles north-east) and Ewell (13 miles north).
Near you in Coldharbour
Typical jobs here are in premises near Wotton and Abinger Commons and Plough Inn. Coldharbour’s nearest station is Holmwood station, roughly 1.6 miles east of the centre. Nearby you will also find Mesolithic Museum (2.6 miles north-west) and Abinger Castle (2.6 miles north-west). Open spaces near Coldharbour include Vann Lake and Leith Hill.
When something else is needed
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It will not put right:
- Mechanical faults with motors, belts or bearings
- Ventilation that was badly designed in the first place
- Dirty ducts beyond the unit itself
If in doubt, call 0345 646 2711 or email us and we’ll say what we think.
What the work covers
- Dampers and louvres
- Drain trays
- Heating and cooling coils
- Internal panels
- Filter sections
- Supply and extract fans
Part by part
Internal casing and panels
The inside walls and floor of the casing collect dust and debris. We clean each section from intake to discharge.
Fans and fan sections
Before the fan is touched, the unit is shut down and made safe in agreement with the site.
Managing agents and facilities teams in Coldharbour
We also work for facilities teams across offices, schools and healthcare across Surrey. Larger estates can be phased building by building to keep disruption down.
When the building owner and the occupier are different, the lease normally sets out who maintains what. We can quote either party, and the report can go to both.