Greater London · Air handling unit cleaning
Air handling unit cleaning in Erith, Greater London
AHU cleaning in Erith from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Air handling units due a clean after building work
- Air handling units never cleaned inside
- Odours coming through the supply air
AHU cleaning in Erith
The fan pushes every bit of air in the system, so dirt on the impeller and housing gets spread around. Fan, housing and the surrounding panels are cleaned as part of the job, with the unit switched off and made safe first. The work covers heating and cooling coils, drain trays and internal panels, and the jobs we see most are drain trays holding standing water and dirty fans and fan housings.
Many London buildings have had their ventilation extended and altered through several fit-outs, leaving sections that are hard to reach and seldom cleaned. In Erith, as elsewhere, cleaning starts with an inspection of what’s there.
We are CHAS and SafeContractor accredited, we hold ISO 9001 and we are fully insured. On top of that, we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, trading since 2009.
- Place
- Erith (DA8, DA17, DA7)
- Wider area
- Greater London
- Reporting
- Report and photos after the visit
- Quotes
- Fixed quote, normally within a working day
- Hours
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Why act early in Erith
Facilities teams are often asked for evidence that the ventilation is looked after. Our certificate and photo report give you clear evidence, for audits, tenants or your own peace of mind. Planning ahead in Erith lets you pick a quiet night rather than lose a busy one.
Several systems or sites on one quote can make for a more efficient booking. Tell us about everything you’d like looked at and we will price it together.
Why choose Duct Doctor in Erith
- CHAS and SafeContractor accredited, with ISO 9001
- Every job surveyed first
- Out-of-hours work and a 24/7 emergency line
- In business since 2009
Towns and villages near Erith
More services for Erith
Honest limits
We’ll always give you a straight diagnosis, so here’s what AHU cleaning will not do:
- Coils that are corroded or leaking and need replacing
- The supply and extract ducts, quoted separately
- Ventilation that was badly designed in the first place
If you are not sure, just ring 0345 646 2711 or email us and we’ll give you a straight answer before booking.
What the work covers
- Internal panels
- Supply and extract fans
- Filter sections
- Drain trays
- Dampers and louvres
- Heating and cooling coils
Between visits
A little care between visits keeps the system in better shape. We recommend:
- File each AHU report in the maintenance log
- Change filters on schedule and log each change
- Watch for drips or damp patches near the plant
- Don’t store bins or materials near the intake
Once the clean is done, we send a TR19® certificate and a report with before and after photos. They belong in the plant or maintenance log.
Keep the area around the intake clear. Anything around the intake is likely to be drawn in.
Ventilation in Erith buildings
Going by the FSA’s register, there are about 22 schools, colleges and universities and about 47 caring premises (care homes, nurseries and hospitals) serving food in Erith and the streets around it, up to about 1.5 miles out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Ventilation cleaning in London buildings is typically planned for evenings or weekends. For Erith, the closest hospital is Erith and District Hospital, roughly within half a mile south-west. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
For workplaces around Erith station with mechanical ventilation, cleaning can be done in the evening or at weekends. Healthcare buildings such as Erith and District Hospital, about within half a mile south-west, depend on their ventilation; if you manage a surgery, clinic or care home near Erith, yours matters too.
Erith is about 3 miles north-west of Dartford, in Greater London. From the centre of Erith to the outskirts, we cover AHU cleaning for every kind of premises, from small sites to large estates. Across Greater London, we cover 764 places, Erith among them. Our London page covers sites nearby, about 11 miles away.
AHU cleaning in DA8, DA17 and DA7 is surveyed, quoted and booked the same way as anywhere else. If you need AHU cleaning at premises on Church Road, Town Square and Erith High Street or a nearby road, we can help. If your site is just outside Erith, we cover Northumberland Heath (1 mile south), Bexley Riverside (1 mile south), Belvedere (1 mile north-west), Lessness Heath (1 mile north-west) and Barnehurst (1 mile south). We also work in nearby towns such as London (11 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (11 miles north-west).
Near you in Erith
Locally, jobs take us to businesses close to Trinity School, The Cross Keys pub and Erith School and the streets around them. Erith has its own railway station: Erith station. A little further out are Erith Museum (less than half a mile east) and Erith and District Hospital (within half a mile south-west). Not far away are Crossness Nature Reserve.
In-house cleaning or a specialist?
Keep a record of what your team does. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, next to our reports.
Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Fixed quotes for AHU cleaning in Erith
The survey tells us what the work involves. The main factors are:
- Parking and loading at the site
- Whether it’s a one-off visit or part of a schedule
- How big the system is
- Access, including roofs, risers and ceiling voids
The cost depends on the size of the system, the condition it’s in and how easy it is to reach. We give you a fixed price before any work starts, so you know where you stand.
What we need to know
Many jobs can be priced from photos and some basics. Useful things to send:
- Close-ups of filters, grilles, hatches or access panels
- Where the site is and what kind of site it is
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- A few general shots of the system
Photos are the quickest way to a quote: 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 we can price many jobs without a visit.
When to call us in Erith
Most units live out of sight on roofs, in plant rooms or in ceiling voids and are rarely seen by anyone but maintenance staff. Months can pass without anyone looking inside.
Signs it’s time to call us include:
- Filters that are clogged or overdue
- Rooms that smell stuffy when the system runs
- Dust built up on fan impellers
- Air handling units never cleaned inside
School buildings such as Christ Church (Erith) CofE Primary School are normally done in the holidays, so classrooms aren’t disturbed.
What your quote should include
- Whether a survey comes first
- How they set the interval to the next visit
- What records you will receive afterwards
- What hours they’ll be on site
How it works
Your staff do not need to do much on the day. A contact on site lets us in at the agreed time and points us to the system, and we take it from there. Before we leave, the area is tidied and the paperwork follows. Security desks and permits-to-work are routine in London, so let us know what your building in Erith needs from us.
- We start with a survey of the unit and a fixed quote for the work.
- The unit is shut down with your site team and the area protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- 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.
Getting ready for the visit
- Let us know how we reach the system, including roofs, risers and plant rooms
- Arrange a key holder or contact on site
- Find the previous report, if there is one
Get a fixed quote
For a fixed quote, phone us on 0345 646 2711 or use the quote form with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You will typically have a quote within one working day.
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Your questions about AHU cleaning in Erith
Is parking a problem for work in Erith?
A loading bay, a visitor permit or off-street space near the site in Erith makes the visit easier to plan. If the building has a loading slot system, we’ll book into it.
Do you work at weekends in Erith?
Yes. We work evenings, overnight and at weekends. Your customers, staff or residents in Erith needn’t be disturbed. Just phone us on 0345 646 2711 or use the quote form with your opening times and we will plan around them.
Do you have insurance?
Yes. Full insurance covers our work and have been trading since 2009.
Which accreditations do you hold?
We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
Do you offer emergency callouts?
Yes. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line, and we will advise on what to do next.
Where does the waste go?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on, so it doesn’t spread.
Can you set up regular visits?
Yes. Plans on a 3, 6 or 12-monthly cycle are available, to suit the system and how it’s used.
Do you cover Erith?
Yes. Erith is part of the area we cover, within the South East and London area we cover.