Reading · Air handling unit cleaning
Air handling unit cleaning in Sonning, Reading
Professional AHU cleaning in and around Sonning, timed so the site keeps working and finished with a written report and photos.
- Filters that are clogged or overdue
- Blocked condensate drains and slimy trays
- Dirty fans and fan housings
AHU cleaning in Sonning
Every supply and extract system relies on the air handling unit at its centre: air is pulled in, filtered, conditioned and sent out through the ducts. Anything that collects inside the unit can end up in the rooms it serves, so cleaning the unit matters as much as cleaning the ducts. If you’re dealing with condensate trays that won’t empty and filters that are clogged or overdue, we can put it right.
Work in a small place like Sonning starts with agreeing access and timings, and the ventilation is inspected, cleaned and recorded the same as anywhere.
Nothing is signed off by word of mouth: a dated report with photos of the work, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Where
- Sonning (RG4)
- Wider area
- Reading
- Paperwork
- Photo report after every visit
- Quote
- A fixed quote up front
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
How the visit works
Night work is normal for us. Evenings, nights and weekends are when much of our work happens, so the site can open as normal afterwards. The visit itself takes from a few hours for a compact unit to a day or more for a large one. Seeing the system in photos first means the trip to Sonning can be planned properly.
- We start with a survey of the unit and a fixed quote for the work.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- We close up the unit and send the certificate and before and after photos.
How to prepare
- Move anything stored near the system
- Let us know when the site is closed or quiet
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Getting a quote
Quotes are quick. Call or email with a few details and you will usually have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Read more
Keeping the system healthy
Here’s the after-treatment advice, short and simple:
- Report musty smells from the vents right away
- Keep the area around the fresh air intake clear
- Look at the condensate drain whenever the unit is serviced
- Diary the inspection date recommended in the report
When we’ve closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to make sure it stays clear.
Make sure access doors and panels on the unit open easily. Sections that are awkward to open are the ones that get skipped.
How the job changes from site to site
Internal casing and panels
Access doors and panels are opened in turn and closed properly afterwards, and check every one is shut.
Heating and cooling coils
A dirty coil holds back the air and makes heating and cooling less effective. A clean gets air moving through the coil properly again.
Nearby places to Sonning
Other services in Sonning
Sonning: your questions answered
Can the work in Sonning be done at night or at weekends?
Yes, evening, overnight and weekend work is normal for us. The site is handed back ready to open. Your opening times are the first thing we ask for.
Can you get to a site in Sonning?
Yes. Villages and rural sites across the South East are part of our work, Sonning included. The journey is planned ahead, so a few details about the route help.
How much does AHU cleaning cost in Sonning?
We do not publish prices, because the cost 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.
How often should an air handling unit be cleaned?
That is set by inspection, in line with TR19® Air. Units in heavy use or in sensitive buildings may need attention more often.
Does the AHU have to be shut down for cleaning?
Yes, for the time we’re working on it. Out-of-hours work is available so the building isn’t left without ventilation when it’s busy.
Is there a survey before the work?
Yes. We always survey first, either from pictures and details you send or on a site visit. A fixed quote follows.
What information do you need?
Just the basics: where it is, what kind of site, when it’s open and the access. Photos and any previous paperwork make it quicker. After that, simply call us on 0345 646 2711 or use the quote form.
Which parts of an air handling unit do you clean?
Every section that collects dirt: filters, coils, tray, fan and panels. We confirm the scope after looking at the unit.
What affects the quote in Sonning
The quote reflects the site in front of us. We consider:
- When the work can happen, such as evenings, overnight or weekends
- Parking and loading at the site
- How many systems or sites are involved
- The scale of the work
Whatever the type of site, the quote works the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we will go through it with you.
What we need to know
When you contact us, it’s useful to have:
- The roof, plant room or outside wall the system runs to
- Detail shots of panels, filters and grilles
- Problems your staff have spotted
- The paperwork from the last visit, if you have it
The quickest way to a quote is to send photos: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and many jobs can be priced from that alone.
Why it’s worth doing now in Sonning
Dirt left in an air handling unit does not stay in the unit. It’s carried through the ductwork and out of the grilles, which is why the unit and the ducts are best cleaned together. Equipment tucked in a roof space or outbuilding near Sonning rarely gets looked at unless someone books it.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, and a neglected system can mean more work. If you are unsure, give us a ring on 0345 646 2711 or email us and we’ll give you an honest view and a fixed quote.
Why us?
- Every job surveyed first
- A written report with pictures after each visit
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- One contact for all your sites in London and the South East
Read what affects the cost and our accreditations.
When it’s something else
A few issues sit outside what this work can do:
- Controls and BMS settings that run the unit
- Ventilation that was badly designed in the first place
- Damaged coils beyond cleaning
If you’re not sure, just call us on 0345 646 2711 or send us an email and we’ll give you a straight answer before you book.
Where we work
- Supply and extract fans
- Internal panels
- Filter sections
- Dampers and louvres
- Drain trays
- Heating and cooling coils
Multi-site and managed buildings
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.
For anyone managing more than one site, we can schedule visits across all of them on one quote. Each site gets its own report and pictures, so each one has its own record.
Ventilation in Sonning buildings
Food Standards Agency records list about 9 schools, colleges and universities and about 21 care, childcare and hospital premises registered as food businesses within roughly a mile and a half of the centre of Sonning. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. The nearest hospital to Sonning is Royal Berkshire Hospital, about 2.6 miles south-west. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. About 35 miles out from central London, Sonning is part of the South East area we work across. The visit is fixed around your opening hours, not ours.
For schools like Sonning Church of England Primary School, the holidays are the usual time to inspect and clean ventilation. If you run a surgery, dental practice or care home near Sonning, clean ventilation matters as much to you as to a hospital like Royal Berkshire Hospital (about 2.6 miles south-west).
Sonning is about 1 mile north-west of Woodley, in Reading. We carry out AHU cleaning for businesses, landlords and public buildings in Sonning and the rest of Reading. Sonning is one of 34 towns, villages and districts in Reading we cover for commercial clients.
Postcode districts we cover here for AHU cleaning: RG4. That includes premises on High Street, Parkway Drive and Pound Lane and nearby roads. You’ll find Sonning on the B478 and B4446, so it’s easy for us to get to for out-of-hours visits. If your site is just outside Sonning, we cover Play Hatch (1 mile north-west), Dunsden Green (2 miles north-west), Newtown (2 miles south-west), Caversham Park Village (2 miles north-west) and Littlestead Green (2 miles north-west). Within a short drive, we also cover Caversham (3 miles west), Norcot (5 miles west), West Reading (4 miles west), Tilehurst Within (5 miles west), Shinfield (5 miles south-west) and Arborfield Garrison (6 miles south).
What’s near Sonning
Around Sonning, our work takes us to kitchens and buildings near Ali's Pond Local Nature Reserve, Bull Inn and Waingels College, among other places. The nearest railway station is Twyford station, roughly 1.9 miles east. Other landmarks nearby include Berkshire Medical Heritage Centre Museum (2.5 miles south-west) and Royal Berkshire Hospital (2.6 miles south-west). The countryside around Sonning includes Sonning Hill and South Lake.