Surrey · Air handling unit cleaning
AHU Cleaning in Chobham
AHU cleaning in Chobham from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Dust built up on fan impellers
- Blocked condensate drains and slimy trays
- Filters that are clogged or overdue
AHU cleaning in Chobham
Heating and cooling coils trap dust that gets past the filters. A coated coil restricts airflow and makes the unit work harder. Coils are cleaned carefully, with methods chosen so the fins aren’t flattened. The work covers heating and cooling coils, dampers and louvres and filter sections, and the jobs we see most are filters that are clogged or overdue and stale or musty smells from the ventilation.
Smaller buildings around Chobham often keep their ventilation units in a roof void or plant cupboard, where they’re easy to forget. Filters, coils and drain trays need attention whatever the size of the unit.
Think of the report as the 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 and sits alongside the report.
- Location
- Chobham (GU24)
- Region
- Surrey
- Paperwork
- Written report with pictures
- Quotes
- Fixed quote, typically within a working day
- Working hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Why act early in Chobham
Facilities teams are often asked for evidence that the ventilation is looked after. Our certificate and photo report give you clear evidence, ready to show anyone who asks. Even a site near Chobham that is only busy part of the week needs its system checked on a schedule.
When the work has to happen, how we reach it and how big the site is can all change the price. Each of those is built into the quote and give you a fixed price before any work starts.
Why choose Duct Doctor in Chobham
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- CHAS and SafeContractor accredited, with ISO 9001
- Fixed quotes, usually within one working day
- Each visit written up, with photos
What affects the quote in Chobham
The quote reflects the site in front of us. We consider:
- How easy every part is to reach
- The condition we find in the survey
- Whether several sites go on one quote
- The times the site is available
One small site or a whole estate, the quote is built the same way: what needs doing, how we get to it and when. You will have a fixed price before work begins.
What we need to know
Photos and a few facts are often enough to price the work. Useful things to send:
- The postcode and the type of business
- The paperwork from the last visit, if you have it
- The times we could work without disrupting the site
- Wide pictures of the system and the area around it
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. Add the site type and your opening hours, and many jobs can be priced from that alone.
What we are called out for in Chobham
Most units live out of sight on roofs, in plant rooms or in ceiling voids, so they’re easy to forget about. It’s easy for a long time to go by without anyone opening the panels.
Most sites get in touch after spotting something like this:
- Fan sections that haven’t been cleaned in years
- Dirty coils holding back the airflow
- Units that have only ever had filter changes
- Odours coming through the supply air
Healthcare ventilation, from large hospitals like Brookwood Hospital (about 2.7 miles south) to small clinics, depends on clean filters, coils and ducts.
What to look for in a quote
- What insurance they carry
- When the next visit should be, and why
- Whether the price is fixed
- Whether inaccessible sections are listed on the report
Chobham questions
Will you come out to Chobham?
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 Chobham be done at night or at weekends?
Yes, evening, overnight and weekend work is normal for us. It means the site in Chobham keeps running as normal. Your opening times are the first thing we ask for.
How much notice do you need?
Book as early as you can for planned work, especially if the next clean or test is due soon. For emergencies, we take calls 24/7.
Is a quote from pictures possible?
Typically, yes. Send a few wide pictures plus close-ups of panels, filters or grilles, and we usually come back within one working day. Some sites still need a visit, and we will say so.
Can you come out in an emergency?
Yes, day and night, every day of the year. Office hours are Monday to Friday, 8am to 6pm, and the emergency line covers the rest.
Can you fix a faulty AHU?
AHU cleaning is what we offer here, not mechanical repairs. If we spot a fault, we note it in the report for your maintenance team to follow up.
What’s included in an AHU clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. The survey confirms what’s in your unit before we quote.
Can you clean the ducts connected to the AHU?
Yes. Ductwork is cleaned through access panels, with anything inaccessible recorded, with new panels fitted where needed.
AHU cleaning in Chobham: local notes
Going by the FSA’s register, there are about 5 caring premises (care homes, nurseries and hospitals) serving food within 1.5 miles or so of the middle of Chobham. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Chobham’s nearest hospital, Brookwood Hospital, is about 2.7 miles south. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. We cover Chobham, about 24 miles from central London, as part of our work across London and the South East. A survey and a fixed quote come first, then the visit at a time that suits you.
School buildings such as St Lawrence CofE (Aided) Primary School are normally done in the holidays, so classrooms are not disturbed.
Chobham is about 3 miles north-west of Woking, in Surrey. Sites in Chobham get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where needed and a written report with photos. Chobham is one of 395 towns, villages and districts in Surrey we cover for AHU cleaning. Our Guildford page covers sites nearby (7 miles or so).
Here we cover the GU24 postcode area for AHU cleaning. Whether your site is on High Street, Back of High Street and Station Road or a nearby road, our technicians can take on the work. Main roads around Chobham include the A319, so getting to you is simple for evening and night visits. Other places close to Chobham include Coxhill Green (1 mile south-west), Castle Green (1 mile south-west), Penny Pot (1 mile south-west), Brick Hill (2 miles north-west) and West End (2 miles south-west). Within a short drive, we also cover Guildford (7 miles south), Woking (3 miles south-east), Camberley (6 miles west), Epsom (14 miles east), Farnham (13 miles south-west) and Ewell (15 miles east).
Around Chobham
Typical jobs here are in premises near Milford Green and Coxhill Green, The Sun Public House and Woking High School. The closest station to Chobham is Longcross station, about 2.3 miles north. Other landmarks nearby include The Peacocks (2.9 miles south-east) and Brookwood Hospital (2.7 miles south). Green spaces nearby include Gracious Pond and Virginia Water Lake.
Managing agents and facilities teams in Chobham
We regularly work with managing agents. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
Facilities teams in offices, schools and healthcare sites book us too across Surrey. Work can be phased by floor, building or site around the people who use them.
Places near Chobham
Also in Chobham
The process
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. On site, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. Evenings, weekends or a closed day all work for a site in a place like Chobham.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before photos of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- After pictures are taken and the certificate issued.
Before we arrive
- Clear loose items from the work area
- Plan for cooking equipment or plant to be off before we arrive
- Mention any sign-in, permit or induction we need
Get a fixed quote
Quoting starts with a diagnosis, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work so you know the cost before we start.
Read more
What the work involves, part by part
Rooftop and plant room units
Many AHUs sit on roofs or in plant rooms with limited access. We plan safe access as part of the survey, before we quote.
Drain trays
Drain trays can rust and leak over time. Their condition goes into the report with photos so repairs can be planned.
Looking after it afterwards
Think of this as the after-treatment advice, in brief:
- Watch for drips or damp patches near the plant
- Do not ignore odours coming through the grilles
- File each AHU report in the maintenance log
- Report stiff or damaged access doors
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.
Have the unit inspected regularly, in line with the risk-based approach of TR19® Air, rather than waiting for a problem.