Greater London · Air handling unit cleaning
Chalk Farm AHU cleaning
We cover Chalk Farm 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 photos on every job.
- Condensate trays that will not empty
- Dirty filters cutting the airflow
- Units needing a clean before a new tenant or handover
AHU cleaning in Chalk Farm
Coils are where a lot of the dirt ends up. Dirt on the fins holds back air and makes the unit work harder to do the same job. We clean coils with methods suited to their condition, taking care not to damage the fins. If you are dealing with dirty filters cutting the airflow and dirty coils holding back the airflow, we can put it right, from dampers and louvres, internal panels and heating and cooling coils onwards.
Across London, offices, hotels, schools and healthcare buildings rely on mechanical ventilation, much of it supplied through air handling units on roofs or in basements. For a building in Chalk Farm, dust settles in the units and ducts year after year.
Good records are part of the job. You get a written report with photos after each visit, covering the work done, any areas we couldn’t access and a recommended next date. Keep it with your fire safety records so it’s to hand when an insurer or inspector asks.
- Location
- Chalk Farm (NW5, NW1, NW3)
- Wider area
- Greater London
- Reporting
- Report and photos after the visit
- Quote
- Fixed quote, typically within a working day
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Questions from Chalk Farm
How do you handle parking and loading in Chalk Farm?
London parking can be tight, so details of loading bays and permits help. Where restrictions apply in the day, an evening or overnight visit usually gets round them.
Do you clean school ventilation in Chalk Farm in the holidays?
Yes. The holidays are the usual time for school work. Around Chalk Farm, the Food Standards Agency lists about 69 schools and colleges with registered kitchens within a mile and a half or so. Booking early in the term gives the best choice of holiday dates.
What does TR19 mean?
It’s the industry benchmark for cleaning ventilation and kitchen extract systems, written by BESA. It covers how systems are inspected, cleaned and checked, and it takes a risk-based approach.
Do you clean the ductwork as well?
Yes. Ductwork is cleaned through access panels, with anything inaccessible recorded, with new panels fitted where necessary.
Do you work in Chalk Farm?
Yes. We work across Greater London, Surrey, Kent, Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, and that includes Chalk Farm.
Can you price the work without visiting?
Usually, yes. Send wide shots, close-ups of any access panels and anything that worries you, and a fixed quote typically follows within one working day. If photos aren’t enough, we will survey first.
Do you look at the system first?
Yes. We always survey first, from your photos and details, or with a visit where necessary. A fixed quote follows.
Are you fully insured?
Yes. Full insurance covers our work and have been trading since 2009.
AHU cleaning around Chalk Farm
Going by the FSA’s register, there are about 69 schools, colleges and universities, about 54 hospitals, care homes and childcare premises and about 38 hotels, B&Bs and guest houses serving food within 1.5 miles or so of the middle of Chalk Farm. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. For Chalk Farm, the closest hospital is St Pancras Hospital, roughly 1 mile south-east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. Getting kit to a London plant room typically means lifts, stairs and an agreed loading slot.
Healthcare buildings such as St Pancras Hospital, about 1 mile south-east, depend on their ventilation; if you manage a surgery, clinic or care home near Chalk Farm, yours matters too. Classrooms and halls at schools such as Haverstock School are easiest to work in when pupils are away.
Chalk Farm is about 1 mile south-east of Hampstead, in Greater London. We carry out AHU cleaning for businesses, landlords and public buildings in Chalk Farm and the rest of Greater London. Our Greater London coverage runs to 764 places, Chalk Farm among them.
Every address in NW5, NW1 and NW3 is covered for AHU cleaning, from busy streets to back roads. Streets in the area include Eton Road, Oval Road and Regal Lane, and we cover them all for AHU cleaning. You will find Chalk Farm on the A5205, which makes it straightforward for our technicians to reach for AHU cleaning. If your site is just outside Chalk Farm, we cover Kentish Town (1 mile east), Primrose Hill (1 mile south-west), Haverstock (1 mile west), Belsize Park (1 mile west) and Camden Town (1 mile south-east). We also work in nearby towns such as London (4 miles south-east), Kensington (4 miles south-west), Shoreditch (3 miles east), Walthamstow (6 miles north-east), Hoxton (3 miles east) and Whitechapel (4 miles south-east).
Around Chalk Farm
Typical jobs here are in premises near Primrose Hill, Cecil Sharp House and The Fiddlers Elbow Public House and the streets around them. You’ll also find Holy Trinity and Saint Silas CofE Primary School (less than half a mile east) and North Bridge House School (0.5 miles south-east). Chalk Farm has its own railway station: Kentish Town West station. A little further out are Isokon Gallery (0.7 miles north-west) and O2 Centre (1.3 miles west). Open spaces near Chalk Farm include Primrose Hill and The Long Water.
Multi-site and managed buildings
Multi-site operators often want one contractor and one number. We cover South East England and London, so a run of sites can go into one programme and kept to a regular schedule.
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. Where responsibility is shared, records matter even more.
Signs you need AHU cleaning in Chalk Farm
Wherever there’s a cooling coil, there’s condensate. A blocked outlet or a badly sloped tray leaves standing water, and that’s where slime and odours start.
If you notice any of these, it’s worth a diagnosis:
- Air handling units never cleaned inside
- Dirty coils holding back the airflow
- Units needing a clean before a new tenant or handover
- Air handling units with blocked filters
Workplaces around Kentish Town West station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts.
Before booking anyone
- Proof of accreditation you can verify
- What paperwork you get at the end
- Whether inaccessible sections are listed on the report
- Whether a survey comes first
Nearby places to Chalk Farm
What else we do in Chalk Farm
Looking after it afterwards
Think of this as the after-treatment advice, short and simple:
- Store the TR19 paperwork where auditors can find it
- Watch for drips or damp patches near the plant
- Don’t ignore odours coming through the grilles
- Do not store bins or materials near the intake
When we’ve closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to make sure it stays clear.
Keep the unit’s doors and panels in working order. If a section is hard to get into, it tends not to get checked.
Staff cleaning versus specialist work
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We will take a look and send you a fixed quote.
What happens on the day
Every visit runs to the same pattern: sheeting and protection first, make the system safe, carry out the AHU cleaning, tidy up and hand over the paperwork. On site, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. Night and weekend working is normal for us in London, and a site in Chalk Farm is no exception.
- We agree a shutdown window that suits the building.
- Before cleaning, each section is photographed.
- We work through the unit from the intake to the outlet.
- The fan and drain tray are cleaned and the drain checked.
- We take after pictures and issue the certificate and report.
Before we arrive
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Dig out any earlier paperwork for the system
- Tell us where we can park and unload
How to get a quote
We do not publish a price list, because every site is different. We look at your system first, from pictures or on a visit, and then send you a fixed quote. To get going, phone us on 0345 646 2711 or drop us a line.
Read more
Part by part
Drain trays
A tray that doesn’t drain becomes a pool of stagnant water in the airstream. We clean it and note if the slope or the drain needs attention.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. The intake section gets particular attention.
What happens if it’s left?
Dirty coils and fans make the unit strain to move the same air. The result is extra wear and a building that doesn’t feel as comfortable, and a planned clean is far less disruptive than a breakdown. A busy site in Chalk Farm builds up dirt and wear quickly, so putting it off makes the eventual job larger.
We do not list prices on the website, because each job is priced on what it involves. Call for a fixed quote, and we’ll talk you through it.
Why choose Duct Doctor in Chalk Farm
- Survey first, then a fixed quote
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Accredited under CHAS and SafeContractor, with ISO 9001
- We’re fully insured