Surrey · Air handling unit cleaning
Air handling unit cleaning in Box Hill, Surrey
AHU cleaning in Box Hill from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Filters that are clogged or overdue
- Plant that needs cleaning after a refit
- Fan sections that haven’t been cleaned in years
Between visits
Simple habits between visits make a real difference. Our advice:
- File each AHU report in the maintenance log
- Stick to the filter change plan
- Check the drain tray is emptying during routine visits
- Diary the inspection date recommended in the report
The report shows each section of the unit before and after, and note any part we couldn’t get to. Any defects we noticed, like a leaking tray or damaged lining, are listed.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.
AHU cleaning in Box Hill, done properly
Think of an AHU clean as a full check-up for the ventilation. We look inside each section, clean what we find and record it with photos, so the report shows exactly what was done. Typical jobs include drain trays holding standing water and air handling units due a clean after building work, across dampers and louvres, drain trays and filter sections.
Work in a small place like Box Hill starts with agreeing access and timings, and the ventilation is inspected, cleaned and recorded the same as anywhere.
The report is your system’s health record: dated, with pictures, and showing what was done. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal, ready for your insurer.
- Location
- Box Hill (KT20)
- Region
- Surrey
- Records
- Photo report after every visit
- Quote
- A fixed price before any work starts
- Working hours
- Out of hours as standard, 24/7 emergency line
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
Common problems we fix in Box Hill
An overdue filter loads up with dirt, which cuts the airflow and can let air slip round the filter. After that, the coils and fan collect what the filter should have caught.
If you notice any of these, it’s worth a diagnosis:
- Units that have only ever had filter changes
- Dirty coils holding back the airflow
- Dirty fans and fan housings
- Units needing a clean before a new tenant or handover
Hospitals such as Headley Court (about 2.8 miles north) show how much a building can rely on clean ventilation, and smaller healthcare sites near Box Hill are no different.
What to look for in a quote
- If the quote is a fixed price or an estimate
- Proof of accreditation you can verify
- What’s included in the scope, part by part
- What paperwork you get at the end
How the job changes from site to site
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. They’re cleaned using methods that won’t bend or flatten the fins.
Internal casing and panels
We open each section through its doors and close them securely when we’re done before the unit is handed back.
Common questions in Box Hill
Do you clean school ventilation in Box Hill in the holidays?
Yes, out-of-term visits are normal for schools. With about 2 schools and colleges on the FSA’s register within roughly a mile and a half of Box Hill, it pays to plan holiday dates ahead. Send us your term dates when you call us on 0345 646 2711 or send us an email, and we’ll fit the work in.
Will you come out to Box Hill?
Yes, we work in villages as well as towns, and Box Hill is covered. Just mention lanes, gates or anything else about the site when you book.
Can you quote from photos?
Typically, yes. Send a few wide photos plus close-ups of panels, filters or grilles, and a fixed quote normally follows within one working day. If photos are not enough, we’ll survey first.
Do you need to switch the unit off?
Yes. The unit has to be shut down and isolated before it’s opened. We agree the timing with your site team.
What do you clean inside the unit?
Filters, coils, drain trays, the fan and the internal surfaces are all covered. What happens to the filters is agreed when we quote.
Do you survey before quoting?
Yes, always. Diagnosis comes before treatment: the survey shows what needs doing and what access we need, and the quote is based on that.
How do you keep the site clean during the work?
With sheeting and covers, before anything else happens. We keep the work contained and clean down when we finish.
What do you do with what you remove?
Waste is contained during the work and removed when we leave, from grease and debris to used cleaning water. We do not leave it behind.
Ventilation in Box Hill buildings
Headley Court is the nearest hospital, about 2.8 miles north of Box Hill. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. About 19 miles out from central London, Box Hill is part of the South East area we work across. A survey and a fixed quote come first, then the visit at a time that suits you.
If you manage offices or shops near Betchworth station, their ventilation can be inspected and cleaned out of hours. School buildings such as The Ashcombe School are usually done in the holidays, so classrooms are not disturbed.
Box Hill is about 2 miles north-east of Dorking, in Surrey. We provide AHU cleaning for commercial premises of every kind in Box Hill and the rest of Surrey. Box Hill is one of 395 places in Surrey where we work for commercial clients. There’s also a page for Guildford, about 12 miles away.
Every address in KT20 is covered for AHU cleaning, from the main roads to the quietest streets. We cover sites on Boxhill Road, Usherwood Close and Fort Road and nearby roads. We also cover Betchworth (1 mile south-east), Brockham (1 mile south), Buckland (1 mile south-east), Strood Green (2 miles south) and Headley (2 miles north). Within a short drive, we also cover Guildford (12 miles west), Woking (13 miles west), Epsom (6 miles north), Horley (7 miles south-east), Redhill (5 miles east) and Ewell (7 miles north).
What’s near Box Hill
In Box Hill, that means kitchens and buildings near Brockham Limeworks and the streets around them. The closest station to Box Hill is Betchworth station, roughly 0.8 miles east of the centre. A little further out are Headley Court (2.8 miles north) and Reigate Priory Museum (3.6 miles east). Not far away are Colley Hill and Reigate Heath.
What your team can do, and what needs us
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but grease that has passed the filters is out of reach. That part needs specialist access and equipment.
Your own staff can handle the daily basics: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, which is where we come in.
Nearby places to Box Hill
More services for Box Hill
Fixed quotes for AHU cleaning in Box Hill
Some jobs are bigger than they look, and some smaller. The main factors:
- When the work can happen, such as evenings, overnight or weekends
- The condition we find in the survey
- One-off work versus a regular cycle
- Any permits to work or inductions
What you pay reflects the actual work. That is why every job is surveyed first, and the price is agreed before we start.
Asking for a quote
We can often survey from pictures. The most useful are:
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Your last certificate, test record or report
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- When the site is open and when it’s quiet
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, you get a fixed price before we start.
How it works
Before we leave, we walk the area with whoever is on site. We point out anything that couldn’t be reached or needs a follow-up, and the same goes into the written report. The visit takes anything from half a day for one small unit to several shifts for a plant room full of them. Pictures of the system and its access let us plan the work in Box Hill before we set off.
- We look at the unit and the plant area during the survey.
- The area is protected and the unit made safe.
- Dirt and debris are removed from each section.
- Coils and trays are cleaned and the condensate drain cleared.
- The unit is closed up and handed back, with a report to follow.
Getting ready for the visit
- Allow time for equipment near the work to be turned off and cool down
- Agree a time when the area can be out of use
- Arrange a key holder or contact on site
Getting a quote
Photos are the quickest way to a quote: 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.
Related advice
Honest limits
A few issues sit outside what this work can do:
- Dirty ducts beyond the unit itself
- Faulty motors, drives or bearings
- Controls and BMS settings that run the unit
Not sure which it is? You can call 0345 646 2711 or send us an email and we will tell you honestly.
What we work on in Box Hill
- Internal panels
- Drain trays
- Supply and extract fans
- Filter sections
- Heating and cooling coils
- Dampers and louvres