Greater London · Air handling unit cleaning
AHU Cleaning in Mitcham
Air handling unit cleaning for businesses, landlords and public buildings in Mitcham. CHAS, SafeContractor and ISO 9001, and fully insured.
- Plant that has been serviced but not cleaned
- Odours coming through the supply air
- Dust-coated heating and cooling coils
How the visit works
Protection comes first: floors, worktops and anything near the work are covered. Then we make the system safe and start. It takes from a few hours for a compact unit to a day or more for a large one, and the area is cleaned down before we leave. Loading bays, visitor permits and roof access are the first things we ask about for a site in Mitcham.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before photos of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- After pictures are taken and the certificate issued.
Getting ready for the visit
- Tell us about site rules, permits or sign-in
- Allow time for equipment near the work to be turned off and cool down
- Clear the space around the work
Ask for a quote
For AHU cleaning in Mitcham, call 0345 646 2711 or email us. Let us know the site type and the opening hours, plus pictures or the previous report if they’re to hand. A fixed quote typically follows within one working day.
Related advice
AHU cleaning in Mitcham
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 drain trays, dampers and louvres and filter sections, and the jobs we see most are odours coming through the supply air and intake sections clogged with outdoor debris.
London offices and flats often have ductwork added through successive refits, with old runs left behind that are hard to reach. An inspection first shows where cleaning is needed in a building in Mitcham.
It’s worth checking any contractor’s accreditations. Ours are BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Place
- Mitcham (CR4, SW16, SM4)
- Wider area
- Greater London
- Records
- Written report with pictures
- Price
- A fixed quote up front
- Working hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
What happens if it’s left?
Facilities teams are often asked for evidence that the ventilation is looked after. A TR19® certificate and photo report give you that, for audits, tenants or your own peace of mind. Shared walls, risers and roofs mean a problem at one London site seldom stays put.
No two sites are the same, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all play a part.
Why choose Duct Doctor in Mitcham
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- A single point of contact for sites across the South East and London
- A written report with pictures after each visit
- Fixed quotes, typically within one working day
See what affects the cost and our accreditations and certificates.
Landlords, agents and facilities managers
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. With shared responsibility, good records help everyone.
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.
Keeping the system healthy
Here’s the after-treatment advice, in brief:
- Do not store bins or materials near the intake
- Report stiff or damaged access doors
- Change filters on schedule and log each change
- Plan the next inspection before the last report gets filed away
Once the clean is done, we send a TR19® certificate and a report with before and after pictures. They belong in the plant or maintenance log.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.
Honest limits
Not every problem is solved by AHU cleaning, and we’ll tell you before work begins. It won’t put right:
- Airflow problems caused by the system’s design
- The supply and extract ducts, quoted separately
- Coils that are corroded or leaking and need replacing
If you’re not sure, just give us a ring on 0345 646 2711, or send details by email and we will give you a straight answer.
Parts of the system we cover
- Supply and extract fans
- Internal panels
- Dampers and louvres
- Heating and cooling coils
- Filter sections
- Drain trays
Common questions in Mitcham
Can parking be tricky for a job in Mitcham?
A loading bay, a visitor permit or off-street space near the site in Mitcham makes the visit easier to plan. Where restrictions apply in the day, an evening or overnight visit typically gets round them.
Do you do school ventilation cleaning in Mitcham in the summer holidays?
Yes. The holidays are the usual time for school work. Around Mitcham, the Food Standards Agency lists about 30 schools and colleges with registered kitchens within a mile and a half or so. You can call us on 0345 646 2711 or email us with the dates the site is empty.
When should our AHU next be cleaned?
That’s set by inspection, in line with TR19® Air. A hard-working unit, or one serving a hospital or care home, may need cleaning more often.
Is there a report after cleaning?
Yes, a TR19® certificate and a photo report. It includes a recommended date for the next check.
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 necessary.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before any work starts, and waste is contained as we go. At the end, the area is cleaned down.
Do you cover Mitcham?
Yes. We work across Greater London, Surrey, Kent, Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, and that includes Mitcham.
Can you look after several sites?
Yes. Tell us the addresses and what each needs and we will quote them together.
Ventilation in Mitcham buildings
The FSA’s food hygiene register lists about 30 schools, colleges and universities and about 41 hospitals, care homes and childcare premises with registered kitchens or food service in Mitcham and the streets around it, up to about 1.5 miles out. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. Many London buildings have had their ductwork altered through several fit-outs, so an inspection comes first. The nearest hospital to Mitcham is Wilson Hospital, about 0.5 miles south-west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Classrooms and halls at schools such as St Thomas of Canterbury Catholic Primary School are easiest to work in when pupils are away. Hospitals such as Wilson Hospital (about 0.5 miles south-west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Mitcham are no different. If you manage offices or shops near Mitcham Eastfields station, their ventilation can be inspected and cleaned out of hours.
Mitcham is about 2 miles west of Thornton Heath, in Greater London. Wherever you are in the CR4 postcode area, we cover AHU cleaning for commercial sites. Across Greater London, we cover 764 places, and Mitcham is one of them. There’s also a page for London, about 7 miles away.
Postcode districts we cover here for AHU cleaning: CR4, SW16 and SM4. If you need AHU cleaning at premises on Kings Road, Baker Lane and Manor Road or anywhere close by, we can help. If your site is just outside Mitcham, we cover Hackbridge (1 mile north), Eastfields (1 mile north), Colliers Wood (1 mile north-west), Merton Abbey (2 miles north-west) and Furzedown (2 miles north). Further out, we also cover London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (9 miles north) and Shoreditch (9 miles north).
Around Mitcham
Locally, jobs take us to businesses close to The Archbishop Lanfranc School, St Mark's Church of England Academy and The White Lion of Mortimer pub, among other places. Mitcham’s nearest station is Mitcham Eastfields station, about 0.5 miles north. Other landmarks nearby include Wandle Industrial Museum (0.7 miles west) and Centrale Croydon (2.7 miles south-east). The countryside around Mitcham includes Duppas Hill and Cranmer Green.
Nearby places to Mitcham
More services for Mitcham
What affects the quote in Mitcham
A fixed price needs a few facts first. We look at:
- Travel, parking and unloading
- The times the site is available
- How big the system is
- How many systems or sites are involved
What you pay depends on how big the system is, the condition it’s in and access to every part of it. You get a fixed price before any work starts, so there are no surprises.
What to send for a quote
To help us quote quickly, please include:
- Where the site is and what kind of site it is
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- A few general shots of the system
- When the site is open and when it’s quiet
Quotes are quick. Send a few details and pictures, and we normally reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.
Different parts, different methods
Filters
Filter condition tells you a lot about the rest of the unit. They’re photographed before and after for your records.
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.