Surrey · Air handling unit cleaning
Hersham AHU cleaning
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for Hersham, with a survey first and a report with pictures at the end. Ask us for a fixed quote.
- Blocked condensate drains and slimy trays
- Dust built up on fan impellers
- Odours coming through the supply air
AHU cleaning for kitchens and businesses in Hersham
An AHU clean is a thorough examination and treatment of the unit. We look inside each section, clean what we find and record it with pictures, so you can see the unit’s condition for yourself. The work covers supply and extract fans, internal panels and heating and cooling coils, and the jobs we see most are debris and leaves in the fresh air intake and units needing a clean before a new tenant or handover.
For a building near Hersham, the visit is planned around how it’s used, and the journey is planned ahead. The work is the same as in any town: inspect, clean, record.
Nothing is signed off by word of mouth: a written report, dated and illustrated with photos, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. It shows what was done and what, if anything, couldn’t be reached.
- Place
- Hersham (KT12)
- Wider area
- Surrey
- Records
- Written report with pictures
- Quote
- Fixed quote, usually within a working day
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What happens if it’s left?
A clogged coil or dirty fan makes the unit work harder for the same airflow. That means more wear on the motor and rooms that feel less fresh, and a clean on your terms beats a breakdown on nobody’s. A site near Hersham that has to close at short notice is hard to cover for.
Working hours, access and the scale of the site can all change the price. Each of those is built into the quote, and the price is fixed before any work starts.
What you get with us
- Every visit written up, with photos
- Ventilation hygiene specialists since 2009
- Accredited under CHAS and SafeContractor, with ISO 9001
- A single point of contact for sites across the South East and London
Read our cost guide and how to check a contractor.
AHU cleaning in Hersham: local notes
The FSA’s food hygiene register lists about 7 schools, colleges and universities and about 15 caring premises (care homes, nurseries and hospitals) with registered kitchens or food service in Hersham and the streets around it, up to about 1.5 miles out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Hersham is about 16 miles from central London, well within the area we cover across London and the South East. A survey and a fixed quote come first, then the visit at a time that suits you. No. 2 New Zealand General Hospital is the nearest hospital, about 1.6 miles north-west of Hersham. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
No. 2 New Zealand General Hospital, about 1.6 miles north-west, is the nearest hospital to Hersham, and healthcare sites of every size need their supply air kept clean. For workplaces around Walton-On-Thames station with mechanical ventilation, cleaning can be done in the evening or at weekends.
Hersham is about 1 mile south of Walton-on-Thames, in Surrey. If you need AHU cleaning in Hersham, it’s easy to get a fixed quote: please call us on 0345 646 2711 or send us an email. We work across South East England and London, Hersham included. Our area takes in 395 places across Surrey, from busy centres to quieter spots. We also work in Guildford, about 11 miles from Hersham.
Every address in KT12 is within our area for AHU cleaning, from busy streets to back roads. Local streets include Police Station Road, Queensway South and Queensway, and we cover them all for AHU cleaning. Main roads around Hersham include the A244, which makes travel easy for evening and night visits. Other places close to Hersham include Burwood Park (1 mile south-west), Walton-on-Thames (1 mile north), Whiteley Village (2 miles south-west), St George's Hill (2 miles west) and Weybridge (2 miles west). Larger places within reach include Guildford (11 miles south-west), Woking (8 miles south-west), Camberley (14 miles west), Epsom (6 miles east), Redhill (14 miles south-east) and Ewell (6 miles east).
Around Hersham
In Hersham, that means kitchens and buildings near The Barley Mow Public House, West End Common and Three Rivers Academy and the streets around them. The closest station to Hersham is Walton-On-Thames station, about 0.6 miles north-west of the centre. A little further out are No. 2 New Zealand General Hospital (1.6 miles north-west) and Chessington Castle Hill (4.8 miles east). Open spaces near Hersham include Claremont Lake and Jubilee Wood.
Hersham: your questions answered
Will you come out to Hersham?
Yes, smaller places are covered as well as towns. Just mention lanes, gates or anything else about the site when you book.
Can the work in Hersham be done at night or at weekends?
Yes, evening, overnight and weekend work is normal for us. Your customers, staff or residents in Hersham needn’t be disturbed. When you call us on 0345 646 2711 or use the quote form, mention when the site is quiet.
Will we get paperwork for the AHU clean?
Yes, a TR19® certificate and a photo report. The report also suggests when the unit should next be inspected.
What’s included in an AHU clean?
Everything inside the unit that air passes over, from intake to discharge, including coils, fan and drain trays. You get a photo report showing each part before and after.
Can you clean the ducts connected to the AHU?
Yes, supply and extract ducts, grilles and diffusers. The survey shows whether the ducts need cleaning now.
How much notice do you need?
The more notice, the better, especially for out-of-hours work. Quotes usually come back within one working day, and there’s a 24/7 line for emergencies.
Can we book visits on a schedule?
Yes. Plans on a 3, 6 or 12-monthly cycle are available, depending on what the system needs.
Do you look at the system first?
Yes. Photos often do the job, while bigger or harder-to-see systems are surveyed on site.
When it’s something else
It’s worth knowing the limits before booking:
- Faulty motors, drives or bearings
- Coils that are corroded or leaking and need replacing
- Problems with the unit’s controls or sensors
If you are not sure, just ring 0345 646 2711 or use the quote form and we will give you a straight answer before you book.
What we work on in Hersham
- Dampers and louvres
- Internal panels
- Filter sections
- Supply and extract fans
- Heating and cooling coils
- Drain trays
What we are called out for in Hersham
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray doesn’t fall properly, water stands in it, and that’s where slime and odours start.
What we are most often called out for:
- Condensate trays that won’t empty
- Odours coming through the supply air
- Plant that has been serviced but not cleaned
- Dirty fans and fan housings
If you manage a school such as Bell Farm Primary School, ventilation cleaning is best booked for the holidays.
What your quote should include
- Whether the quote is based on a survey or pictures
- If the quote is a fixed price or an estimate
- When the next visit should be, and why
- Exactly which parts of the system are covered
Staff cleaning versus specialist work
Staff cleaning and specialist work aren’t the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We can diagnose it and quote.
Landlords, agents and facilities managers
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we can quote for the whole system.
Facilities teams in offices, schools and healthcare sites book us too across Surrey. Larger estates can be phased building by building to keep disruption down.
Also in Hersham
The process
Everything the job needs comes with us, including protection sheets, the right tools and access kit. All we need from you is clear access and the right equipment switched off. On site, the work takes one overnight shift for many single units, with bigger plant phased. Everything the job in Hersham needs is worked out beforehand, from the survey.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
Before we arrive
- Clear the space around the work
- Mention any parking or loading restrictions
- Find the previous report, if there is one
Ask for a quote
We don’t publish a price list, because every site is different. Instead, we look at your site first, from photos or a survey, and then send you a fixed quote. To start, call us on 0345 646 2711 or email us.
Related advice
Fixed quotes for AHU cleaning in Hersham
You’ll get a fixed price before any work starts. It takes into account:
- Whether it’s a one-off visit or part of a schedule
- What state the system is in
- Whether we need access equipment or extra panels
- Site requirements such as sign-in and permits
Every site is different, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all make a difference.
Asking for a quote
Many jobs can be priced from photos and some basics. Useful things to send:
- Any access panels or hatches you can see
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- A few general shots of the system
- The roof, plant room or outside wall the system runs to
To get a fixed quote, call us on 0345 646 2711, or email photos with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. You will typically have a quote within one working day.