Greater London · Air handling unit cleaning
AHU Cleaning in Dartmouth Park
We cover Dartmouth Park for cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Out-of-hours visits, a fixed quote and a written report with pictures on every job.
- Plant that has been serviced but not cleaned
- Fan sections that haven’t been cleaned in years
- Intake sections clogged with outdoor debris
AHU cleaning in Dartmouth Park
Our AHU cleaning covers sites in Dartmouth Park 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 heating and cooling coils, internal panels and drain trays, and people most often call us about air handling units with blocked filters and intake sections clogged with outdoor debris.
London buildings tend to keep their plant on the roof or below ground, so work in Dartmouth Park is often done in the evening or at weekends. Parking and loading are agreed with the building in advance.
Duct Doctor has been trading since 2009, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Location
- Dartmouth Park (NW5, N19, N7)
- Region
- Greater London
- Records
- Photo report after each visit
- Quote
- Fixed quote, normally within a working day
- When we work
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
Do you need AHU cleaning in Dartmouth Park?
Most units live out of sight on roofs, in plant rooms or in ceiling voids and are rarely seen by anyone but maintenance staff. It’s easy for a long time to go by without anyone opening the panels.
It’s time to book a visit if you see:
- Dirty fans and fan housings
- Rooms that smell stuffy when the system runs
- Air handling units never cleaned inside
- Blocked condensate drains and slimy trays
Classrooms and halls at schools such as Acland Burghley School are easiest to work in when pupils are away.
Questions to ask before you book
- Exactly which parts of the system are covered
- Proof of accreditation you can verify
- Whether they recommend a next date
- What happens if part of the system can’t be accessed
Places near Dartmouth Park
Other services in Dartmouth Park
AHU cleaning in Dartmouth Park: local notes
The FSA’s food hygiene register lists about 50 schools, colleges and universities, about 64 hospitals, care homes and childcare premises and about 18 hotels and B&Bs with registered kitchens or food service within 1.5 miles or so of the middle of Dartmouth Park. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Royal Northern Hospital is the nearest hospital, about 0.8 miles east of Dartmouth Park. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. Many London buildings have had their ductwork altered through several fit-outs, so an inspection comes first.
Healthcare buildings such as Royal Northern Hospital, about 0.8 miles east, depend on their ventilation; if you manage a surgery, clinic or care home near Dartmouth Park, yours matters too. If you run an office near Gospel Oak station, its supply ductwork can gather dust for years before anyone looks inside.
Dartmouth Park is about 2 miles east of Hampstead, in Greater London. We provide AHU cleaning for commercial premises of every kind in Dartmouth Park and the rest of Greater London. Across Greater London, we cover 764 places, and Dartmouth Park is one of them.
AHU cleaning in NW5, N19 and N7 is surveyed, quoted and booked the same way as anywhere else. That includes premises on Hugo Road, Ward Road and Anson Road and nearby roads. Other places close to Dartmouth Park include Lissenden Gardens (1 mile south-west), Tufnell Park (1 mile east), Gospel Oak (1 mile south-west), Upper Holloway (1 mile north-east) and Highgate (1 mile north). We also work in nearby towns such as London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south), Kensington (5 miles south-west), St Pancras (3 miles south-east) and Shoreditch (4 miles south-east).
Landmarks near Dartmouth Park
Locally, jobs take us to businesses close to The Dartmouth Arms, Whittington Park and Brookfield Primary School. Nearby too are Asanté Academy of Chinese Medicine (1.4 miles north) and Vaughan Williams Memorial Library (1.5 miles south). For rail, the closest station is Gospel Oak station, about 0.5 miles south-west. Other landmarks nearby include O2 Centre (1.8 miles south-west) and Isokon Gallery (1 mile south-west). Open spaces near Dartmouth Park include Belsize Wood and Dartmouth Park Hill.
What we do, step by step
The first job on site is protection: floors, worktops and anything near the work are covered. Then we make the system safe and start. It takes half a day to a full day per unit, with large plant planned over several shifts, and we clear up before we go. If your building in Dartmouth Park has sign-in rules, permits or key holders, mention them when you book.
- We look at the unit and the plant area during the survey.
- 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.
- We close every panel, hand the unit back and send the report and certificate.
Getting ready for the visit
- Tell us the best time to work, such as after service or at a weekend
- Clear the space around the work
- Make sure someone can let us in and lock up afterwards
How to get a quote
Here’s what helps us quote: where the site is, what it is and its opening hours, photos of the system and any previous report or certificate. Then ring 0345 646 2711 or email us.
Related advice
Dartmouth Park: your questions answered
What do you need to know about parking in Dartmouth Park?
Tell us where a van can stop near your site in Dartmouth Park, and about any building rules on loading. Night visits tend to make loading easier on London streets.
Do you clean school ventilation in Dartmouth Park in the holidays?
Yes. Half-terms and the summer break are the natural time for school work. There are about 50 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Dartmouth Park. Tell us your holiday dates and we will book the visit for when the site is empty.
Do you have insurance?
Yes. We carry full insurance and have been trading since 2009.
Does the AHU have to be shut down for cleaning?
Yes. The fan must be stopped and the unit isolated, and we time the work to suit the site.
Do you work evenings or weekends?
Yes. We time the work to fit the building’s hours. Healthcare and care settings are planned with staff.
How do you keep the site clean during the work?
Floors and surfaces near the work are sheeted before we start, and anything we remove is contained. At the end, the area is cleaned down.
Can you quote from pictures?
Often, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Larger or hidden systems need a survey on site first.
How long will the unit be out of action?
Typically the clean takes half a day to a full day per unit, with large plant planned over several shifts. The shutdown is planned to fit, out of hours if needed.
Between visits
Results last longer with the right care. Here’s what we suggest:
- Look at the condensate drain whenever the unit is serviced
- Flag stale or damp smells in the supply air
- Report stiff or damaged access doors
- File each AHU report in the maintenance log
The report shows each section of the unit before and after, and note any part we couldn’t get to. It also notes faults we spotted, such as damaged panels or a blocked drain.
Make the drain tray part of every maintenance visit. A drain that is cleared early never gets to the slime stage.
What affects the quote in Dartmouth Park
We quote each job individually. These are the things that affect it:
- Whether several sites go on one quote
- The size of the system
- One-off work versus a regular cycle
- The condition of the system
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. Call for a fixed quote and we will go through it with you.
What to send for a quote
A few details help us quote accurately. When you get in touch, it helps to send:
- The site address and the type of premises
- Any symptoms, from odd noises to smells or leaks
- Photos showing the whole system and its surroundings
- Where the plant sits or the system leaves the building, such as a roof or outside wall
Some systems can be priced from pictures; others need a survey. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, you get a fixed price before we start.
Part by part
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.
Internal casing and panels
Damaged internal linings or loose panels can shed material into the air. We note any we find in the report.
For landlords and multi-site operators
Facilities teams in offices, schools and healthcare sites book us too across Greater London. Work can be phased by floor, building or site around the people who use them.
If you look after several sites, 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.
What a clean will not put right
A few issues sit outside what this work can do:
- Problems with the unit’s controls or sensors
- A system that is undersized for the building
- Damaged coils beyond cleaning
If you are not sure, just ring 0345 646 2711 or use the quote form and we’ll give you a straight answer before booking.
Parts of the system we cover
- Filter sections
- Internal panels
- Dampers and louvres
- Supply and extract fans
- Drain trays
- Heating and cooling coils