Greater London · Air handling unit cleaning
Air handling unit cleaning in Collier Row, Greater London
AHU cleaning in Collier Row, surveyed first and signed off with a written report and pictures. Ask us for a fixed quote.
- Leaves and litter drawn into the unit
- Condensate trays that won’t empty
- Dirty filters cutting the airflow
What affects the cost of AHU cleaning
There’s no set price list, because sites vary so much. The quote depends on:
- The condition of the system
- Travel, parking and unloading
- Site requirements such as sign-in and permits
- How easy every part is to reach
We do not list prices on the website, because the cost depends on the site in front of us. For a fixed quote, ring 0345 646 2711 or drop us a line, and we will explain what it covers.
What we need to know
Photos and a few facts are often enough to price the work. Useful things to send:
- Detail shots of panels, filters and grilles
- The paperwork from the last visit, if you have it
- A few general shots of the system
- Problems your staff have spotted
Here’s what helps us quote: the address, the type of site and when it’s open, pictures of the system and the last certificate or report, if there is one. Once you have those, ring 0345 646 2711 or email us.
AHU cleaning in Collier Row
Our AHU cleaning covers sites in Collier Row and the rest of Greater London, in offices, schools, hospitals, care homes and retail. Units are cleaned when the site can spare them, often evenings, overnight or weekends. The work covers supply and extract fans, drain trays and dampers and louvres, and people most often call us about debris and leaves in the fresh air intake and air handling units due a clean after building work.
London offices and flats often have ductwork added through successive refits, leaving sections that are hard to reach and seldom cleaned. In Collier Row, as elsewhere, cleaning starts with an inspection of what’s there.
Nothing is signed off by word of mouth: a dated report with pictures of the work, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. It shows what was done and what, if anything, couldn’t be reached.
- Where
- Collier Row (RM1, RM5, RM7)
- Region
- Greater London
- Reporting
- Written report with pictures
- Quotes
- A fixed price before we start
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Why deal with it now?
Standing water in a drain tray doesn’t clear itself. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Clearing it now is a much smaller job. 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. The size of the job, how we reach it, its condition and the working hours all make a difference.
Why choose Duct Doctor in Collier Row
- Trading since 2009
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- Evenings, overnight and weekends, plus 24/7 emergency callout
- We’re fully insured
Take a look at how cleaning jobs are priced or our accreditations and certificates.
Keeping the system healthy
Simple habits between visits make a real difference. We recommend:
- Watch for drips or damp patches near the plant
- Change filters on schedule and log each change
- Keep the certificate and photo report with the plant records
- Keep the area around the fresh air intake clear
Restart the unit with your site team or maintenance contractor once we have finished. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Make the drain tray part of every maintenance visit. A drain that is cleared early never gets to the slime stage.
What the work involves, part by part
Rooftop and plant room units
Many AHUs sit on roofs or in plant rooms with limited access. Access is planned during the survey so the quote reflects it.
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.
Also near Collier Row
More services for Collier Row
Collier Row buildings and their air
There are about 17 schools, colleges and universities, about 46 caring premises (care homes, nurseries and hospitals) and about 7 hotels, B&Bs and guest houses on the FSA’s food hygiene register within 1.5 miles or so of the middle of Collier Row. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. Getting kit to a London plant room normally means lifts, stairs and an agreed loading slot. The nearest hospital to Collier Row is Oldchurch Hospital, about 1.5 miles south. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
If you run a surgery, dental practice or care home near Collier Row, clean ventilation matters as much to you as to a hospital like Oldchurch Hospital (about 1.5 miles south).
Collier Row is about 1 mile north of Romford, in Greater London. We provide AHU cleaning for commercial premises of every kind in Collier Row and the rest of Greater London. Collier Row is one of 764 places in Greater London where we work for AHU cleaning. For sites nearby, see our London page (13 miles or so).
Our technicians cover all of RM1, RM5 and RM7 for AHU cleaning and the streets around it. That includes premises on Elm Road, Percy Road and Seymer Road and nearby roads. Neighbouring places we cover for AHU cleaning include Rise Park (1 mile north-east), Romford (1 mile south), Marks Gate (1 mile west), Chadwell Heath (2 miles south-west) and Rush Green (2 miles south). Larger places within reach include London (13 miles south-west), City of Westminster (15 miles west), Marylebone (15 miles west), St Pancras (13 miles west), Shoreditch (12 miles south-west) and Walthamstow (8 miles west).
Landmarks near Collier Row
We work in commercial kitchens and buildings around Colley Rowe Inn, Marshalls Park Academy and Raphael Park and the streets around them. For rail, the closest station is Romford station, roughly 1.3 miles south. Other landmarks nearby include Romford Shopping Hall (1 mile south) and Oldchurch Hospital (1.5 miles south). Not far away are Bedfords Park.
When to call us in Collier Row
Mechanical servicing keeps a unit running, but it does not always include cleaning the inside. That means a unit can tick every service box and still be carrying years of dirt.
It’s time to book a visit if you see:
- Filters that are clogged or overdue
- Stale or musty smells from the ventilation
- Plant that has been serviced but not cleaned
- Debris and leaves in the fresh air intake
If you manage a school such as Rise Park Infant School, ventilation cleaning is best booked for the holidays.
Before you book anyone
- Whether a survey comes first
- Exactly which parts of the system are covered
- Whether a written report and photos are included
- How they set the interval to the next visit
When it’s something else
AHU cleaning cannot fix everything, and we’d rather say so up front. It will not put right:
- Airflow problems caused by the system’s design
- Leaking heating or cooling coils
- The supply and extract ducts, quoted separately
Not sure which it is? You can ring 0345 646 2711 or send us an email and we will tell you honestly before booking.
Parts of the system we cover
- Heating and cooling coils
- Filter sections
- Internal panels
- Dampers and louvres
- Drain trays
- Supply and extract fans
What we do, step by step
Before we leave, we walk the area with whoever is on site. Anything we couldn’t reach or that needs attention is pointed out there and then, and the same goes into the written report. All told, the work takes one overnight shift for many single units, with bigger plant phased. Before any visit in Collier Row, we agree where the van can stop and how equipment reaches the system.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- The unit is closed up and handed back, with a report to follow.
Preparing for the visit
- Dig out any earlier paperwork for the system
- Tell us the best time to work, such as after service or at a weekend
- Make sure someone can let us in and lock up afterwards
Ask for a quote
We don’t publish a price list, because every site is different. We look at your system first, from photos or on a visit, and then send you a fixed quote. To get going, call us on 0345 646 2711, or email photos.
Related advice
Your questions about AHU cleaning in Collier Row
Can you work in Collier Row outside opening hours?
Yes, evening, overnight and weekend work is normal for us. The work in Collier Row can fit around your hours. Your opening times are the first thing we ask for.
Does London parking affect a job in Collier Row?
Tell us where a van can stop near your site in Collier Row, and about any building rules on loading. Where restrictions apply in the day, an evening or overnight visit typically gets round them.
Can you clean the ducts connected to the AHU?
Yes. We clean supply and extract ductwork to TR19® Air as well. Cleaning the unit and ducts together often makes sense, and we can survey both on the same visit.
Can you look after several sites?
Yes. We work across South East England and London, so sites at different addresses can be planned together as one programme. Every site has its own report.
Is there a report after cleaning?
Yes. Every clean comes with a TR19® certificate and a photo report. Keep them in the maintenance log.
Does the AHU have to be shut down for cleaning?
Yes. The unit has to be shut down and isolated before it’s opened. The shutdown is planned with whoever runs the building.
Do you cover Collier Row?
Yes. We cover Collier Row and across Greater London, within our South East and London area. To book, call 0345 646 2711 or drop us a line.
What does AHU cleaning cost?
We don’t 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 work begins.