Greater London · Air handling unit cleaning
Air handling unit cleaning in Greenhill, Greater London
Specialist AHU cleaning for Greenhill: a survey, a fixed price, careful work and proper paperwork. Ask us for a fixed quote.
- Units needing a clean before a new tenant or handover
- Fan sections that haven’t been cleaned in years
- Plant that has been serviced but not cleaned
AHU cleaning in Greenhill, done properly
Every supply and extract system relies on the air handling unit at its centre: air is pulled in, filtered, conditioned and sent out through the ducts. Whatever builds up inside it travels with that air, which is why we clean the unit itself, not just the ducts. Common call-outs are for coils clogged with dust and debris and drain trays holding standing water, on filter sections, dampers and louvres and internal panels.
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 Greenhill, dust settles in the units and ducts year after year.
The report is your system’s health record: dated, with photos, and showing what was done. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal, ready for your insurer.
- Location
- Greenhill (NW3, NW6)
- Region
- Greater London
- Records
- Photo report after each visit
- Price
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What affects the quote in Greenhill
You’ll get a fixed price before any work starts. It’s based on:
- The condition of the system
- Whether it’s a one-off visit or part of a schedule
- How easy every part is to reach
- The scale of the work
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Ask for a fixed quote and we’ll explain each part.
Helping us quote
The more you tell us, the more accurate the quote. When you get in touch, it helps to send:
- The times we could work without disrupting the site
- A few general shots of the system
- Any symptoms, from odd noises to smells or leaks
- Where the plant sits or the system leaves the building, such as a roof or outside wall
For a fixed quote, call 0345 646 2711 or use the quote form and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. You’ll usually have a quote within one working day.
Why deal with it now?
A clogged coil or dirty fan makes the unit work harder for the same airflow. That means more wear on the motor and rooms that feel less fresh, and a clean on your terms beats a breakdown on nobody’s. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
You will not find a price list here, because each job is priced on what it involves. Call for a fixed quote, and we will talk you through it.
Why Greenhill businesses choose us
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- Evenings, overnight and weekends, plus 24/7 emergency callout
- A written report with pictures after every visit
- Survey first, then a fixed quote
See what affects the cost and our accreditations and certificates.
Greenhill buildings and their air
Food Standards Agency data includes about 69 schools, colleges and universities, about 55 hospitals, care homes and childcare premises and about 23 hotels and B&Bs in and around Greenhill, up to about a mile and a half out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. New End Hospital is the nearest hospital, about under half a mile north-west of Greenhill. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. In London, ventilation plant is often on the roof or below ground, so the work is typically done out of hours.
Wherever a school like The Royal School has ducted ventilation, a half-term visit keeps the work out of lesson time. If you run a surgery, dental practice or care home near Greenhill, clean ventilation matters as much to you as to a hospital like New End Hospital (about within half a mile north-west).
Greenhill is about 1 mile north-east of Hampstead, in Greater London. We carry out AHU cleaning for commercial premises of every kind in Greenhill and the rest of Greater London. Greenhill is one of 764 places in Greater London we cover for commercial clients.
Every address in NW3 and NW6 is covered for AHU cleaning, from busy streets to back roads. You will find streets such as Back Lane, Well Road and Ornan Road, and we cover them all for AHU cleaning. Other places close to Greenhill include Hampstead (1 mile south-west), Vale of Health (1 mile north), West Hampstead (1 mile west), Fortune Green (1 mile west) and Haverstock (1 mile south-east). Within a short drive, we also cover London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (3 miles south-east) and Shoreditch (5 miles south-east).
Near you in Greenhill
In Greenhill, that means kitchens and buildings near Cecil Sharp House, Fitzjohn's Primary School and King William IV Public House. Also close by are South Hampstead High School (0.6 miles south) and Hampstead Heath (0.7 miles north-east). Greenhill has its own railway station: Hampstead Heath station. Other landmarks nearby include New End Hospital (less than half a mile north-west) and Montfichet's Tower (4.3 miles south-east). For a walk, there’s Belsize Wood and Parliament Hill.
How the job changes from site to site
Heating and cooling coils
Coil fins are close together and catch the dust the filters miss. They’re cleaned using methods that will not bend or flatten the fins.
Drain trays
Standing water in a tray sits right where the air passes. We clean it and report anything about the tray or drain that needs fixing.
What staff can safely do
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. What they can’t safely do is clean inside the ductwork, the fan or the risers, and that’s where we come in.
When your team notices a problem 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’ll take a look and give you a fixed quote.
Signs you need AHU cleaning in Greenhill
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:
- Plant that has been serviced but not cleaned
- Blocked condensate drains and slimy trays
- Intake sections clogged with outdoor debris
- Stale or musty smells from the ventilation
Workplaces around Hampstead Heath station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts.
Questions to ask before you book
- Whether inaccessible sections are listed on the report
- What records you will receive afterwards
- How VAT is shown on the quote
- What insurance they carry
Landlords, agents and facilities managers
From a single site to a large estate, the standard is the same: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
Managing agents often deal with us directly. Send the address, what’s needed and how access works, and we will send a fixed quote.
How it works
We are used to working while the site is closed. Evenings, nights and weekends are when much of our work happens, so the site can open as normal afterwards. On site, the work takes anything from half a day for one small unit to several shifts for a plant room full of them. Expect the work in Greenhill to happen after your last customer leaves, not during trading.
- We agree a shutdown window that suits the building.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- We take after photos and issue the certificate and report.
Getting ready for the visit
- Tell us where we can park and unload
- Let us know when the site is closed or quiet
- Arrange a key holder or contact on site
Get a fixed quote
Every quote begins with a look at the system, either from photos and details you send or from a site visit. After that, you get a fixed price for the work so you know the cost before we start.
Related advice
Your questions about AHU cleaning in Greenhill
Do you do school ventilation cleaning in Greenhill in the summer holidays?
Yes, and it’s the easiest time to do it. With about 69 schools and colleges on the FSA’s register within roughly a mile and a half of Greenhill, it pays to plan holiday dates ahead. Just give us a ring on 0345 646 2711 or drop us a line with your term dates and we’ll plan around them.
Can the work in Greenhill be done at night or at weekends?
Yes, we can come after you close and finish before you open. It means the site in Greenhill keeps running as normal. When you ring 0345 646 2711 or drop us a line, mention when the site is quiet.
How often should an air handling unit 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.
What’s TR19?
A BESA specification, with two parts that matter most here: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It isn’t law, but it’s the benchmark.
Do you offer emergency callouts?
Yes, any time. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line and we will talk you through the next steps.
Are you fully insured?
Yes. We’re fully insured, and we can share the details when you need them.
Can you fix a faulty AHU?
Our AHU work is cleaning rather than mechanical repair. Any faults we notice are recorded for your maintenance team to follow up.
What about areas you can’t get to?
We never leave them off the paperwork. You’ll know exactly which parts weren’t reached and why, and we can quote to improve the access.