Surrey · Air handling unit cleaning
Air handling unit cleaning in Dorking, Surrey
AHU cleaning for Dorking and the surrounding area: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.
- Stale or musty smells from the ventilation
- Air handling units with blocked filters
- Units needing a clean before a new tenant or handover
What a clean will not put right
To be straight with you, some problems need a different fix:
- Faulty motors, drives or bearings
- Ductwork downstream of the unit, which is a separate clean
- Ventilation that was badly designed in the first place
If you’re not sure, just call 0345 646 2711 or email us and we’ll give you a straight answer before you book.
Parts of the system we cover
- Dampers and louvres
- Internal panels
- Filter sections
- Supply and extract fans
- Heating and cooling coils
- Drain trays
How we handle AHU cleaning in Dorking
All the building’s air passes through the fan, so dirt on the impeller and housing gets spread around. Fan, housing and the surrounding panels are cleaned as part of the job, with the unit switched off and made safe first. The work covers heating and cooling coils, drain trays and internal panels, and people most often call us about rooms that smell stuffy when the system runs and intake sections clogged with outdoor debris.
Around a town like Dorking, the buildings with ducted ventilation are typically offices, schools, surgeries and care homes. Their supply and extract ducts all gather dust over time, and TR19® Air sets out how to inspect and clean them.
We are CHAS and SafeContractor accredited, we hold ISO 9001 and we’re fully insured. We are also a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we’ve been trading since 2009.
- Where
- Dorking (RH4, RH5)
- Region
- Surrey
- Records
- Report and pictures after the visit
- Quote
- Fixed quote, normally within a working day
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
When to call us in Dorking
Filters that aren’t changed or cleaned on time clog up, cutting airflow and sometimes letting dirty air bypass them altogether. After that, the coils and fan collect what the filter should have caught.
Keep an eye out for these warning signs:
- Intake sections clogged with outdoor debris
- Drain trays holding standing water
- Filters that are clogged or overdue
- Plant that needs cleaning after a refit
If you manage a school such as St Paul's CofE (Aided) Primary School, ventilation cleaning is best booked for the holidays.
What your quote should include
- What paperwork you get at the end
- Whether the figure could change on the day
- What’s included in the scope, part by part
- How areas they cannot reach will be recorded
In-house cleaning or a specialist?
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but the parts you cannot see still need a specialist at the right interval.
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We’ll take a look and send you a fixed quote.
FAQs for Dorking
Can you clean school ventilation in Dorking during the holidays?
Yes. Half-terms and the summer break are the natural time for school work. There are about 2 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Dorking. Booking early in the term gives the best choice of holiday dates.
Do you work overnight in Dorking?
Yes, evening, overnight and weekend work is normal for us. Your customers, staff or residents in Dorking needn’t be disturbed. When you phone us on 0345 646 2711, or send details by email, mention when the site is quiet.
Is a quote from photos possible?
Typically, yes. Send wide shots, close-ups of any access panels and anything that worries you, and a fixed quote normally follows within one working day. If pictures are not enough, we will survey first.
Are you insured?
Yes, fully. We also hold CHAS and SafeContractor, for sites that check contractor safety.
How much notice should we give?
Book as early as you can for planned work, especially if the next clean or test is due soon. Emergencies are different, because our line is open 24/7.
How long will the unit be out of action?
The work takes half a day to a full day per unit, with large plant planned over several shifts. Bigger units can be phased, so ring 0345 646 2711 or use the quote form to talk it through.
Is there a survey before the work?
Yes, always. We diagnose before we treat: the survey tells us what the system needs and how to reach it, and the quote is based on that.
Is there a report after cleaning?
Yes. A TR19® certificate and photo report are sent after the clean, with any faults we noticed.
Keeping the system healthy
Once we’ve finished, these simple steps help:
- Diary the inspection date recommended in the report
- Stick to the filter change plan
- Report stiff or damaged access doors
- Watch for drips or damp patches near the plant
Keep filter changes on schedule between cleans, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Regular inspection under TR19® Air shows when cleaning is due, rather than waiting for a problem.
Part by part
Heating and cooling coils
Dirt on a coil slows the air and makes it harder for the coil to heat or cool. Cleaning restores the open path through the fins.
Filters
Dirty filters cut airflow and let dirt slip past their frames. We clean the frames and rails so the filters sit tight.
Nearby places to Dorking
More services for Dorking
Managing agents and facilities teams in Dorking
We work for landlords, managing agents and facilities managers as well as the people running the site. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we can quote for the whole system.
We also work for facilities teams across offices, schools and healthcare across Surrey. Larger estates can be phased building by building around the people who use them.
The process
There’s very little for your team to do on the day. A contact on site lets us in at the agreed time and points us to the system, and the rest is down to us. Before we leave, the area is tidied and the paperwork follows. Before the visit, a few pictures of the system and how to reach it help us plan the work in Dorking.
- 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.
- The fan and drain tray are cleaned and the drain checked.
- We take after pictures and issue the certificate and report.
Getting ready for the visit
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Clear the space around the work
- Let us know about permits to work or site inductions
How to get a quote
We don’t publish a 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 send us an email.
Read more
AHU cleaning around Dorking
Going by the FSA’s register, there are about 10 care, childcare and hospital premises and about 4 hotels and guest houses serving food within about 1.5 miles of central Dorking. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. At about 21 miles from central London, Dorking sits well inside the area we cover. Evening, overnight and weekend visits are all possible. The nearest hospital to Dorking is Headley Court, about 4.8 miles north-east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Headley Court, about 4.8 miles north-east, is the nearest hospital to Dorking, and healthcare sites of every size need their supply air kept clean. For workplaces around Dorking Deepdene station with mechanical ventilation, cleaning can be done in the evening or at weekends.
Dorking is about 10 miles north-west of Crawley, in Surrey. Anywhere in RH4, we cover AHU cleaning for commercial sites. We cover 395 places across Surrey, from busy centres to quieter spots. For sites nearby, see our Guildford page, about 11 miles away.
Every address in RH4 and RH5 is covered for AHU cleaning, from busy streets to back roads. Local streets include High Street, Station Road and London Road, and we cover them all for AHU cleaning. Dorking is on the A24 and A25, which makes it straightforward for our technicians to reach for out-of-hours visits. Nearby, we also carry out AHU cleaning in Pixham (1 mile north-east), North Holmwood (1 mile south), Westhumble (2 miles north), Westcott (2 miles west) and Blackbrook (2 miles south-east). Further out, we also cover Guildford (11 miles west), Woking (12 miles north-west), Epsom (8 miles north), Horley (8 miles south-east), Redhill (7 miles east) and Ewell (9 miles north).
Local landmarks in Dorking
Typical jobs here are in premises near The Wheatsheaf Public House, The Ashcombe School and Deepdene Terrace and the streets around them. Other local landmarks include The Ashcombe School (0.6 miles north) and Pippbrook House (0.5 miles north). The closest station to Dorking is Dorking Deepdene station, about 0.6 miles north. A little further out are Mesolithic Museum (3.9 miles south-west) and Headley Court (4.8 miles north-east). For a walk, there’s Reigate Heath and Box Hill.