Greater London · Air handling unit cleaning
AHU Cleaning in New Southgate
Our technicians work in New Southgate on air handling unit cleaning. Fixed quotes, work around your opening hours and photo reports as standard.
- Stale or musty smells from the ventilation
- Condensate trays that won’t empty
- Leaves and litter drawn into the unit
Staff cleaning versus specialist work
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, and that is where we come in.
A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. Leave those to us.
About our AHU cleaning in New Southgate
Every supply and extract system relies on the air handling unit at its centre: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Whatever builds up inside it travels with that air, which is why we clean the unit itself, not just the ducts. If you’re dealing with drain trays holding standing water and leaves and litter drawn into the unit, we can help, from drain trays, heating and cooling coils and filter sections onwards.
London buildings often depend on air handling units in plant rooms or on the roof to supply fresh air. For a building in New Southgate, dust settles in the units and ducts year after year, which is what TR19® Air cleaning deals with.
Duct Doctor has been trading since 2009, and we’re 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
- New Southgate (N11, N10, N14)
- Region
- Greater London
- Records
- Photo report after every visit
- Quote
- A fixed quote up front
- Working hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
What we do, step by step
Your staff don’t need to do much on the day. Someone lets us in at the agreed time and shows us where everything is, and the rest is down to us. Afterwards, the area is left tidy and the written report follows. Night and weekend working is normal for us in London, and a site in New Southgate is no exception.
- 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.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Tell us the best time to work, such as after service or at a weekend
- Mention any parking or loading restrictions
- Plan for cooking equipment or plant to be off before we arrive
How to get a quote
We don’t publish a price list, because every site is different. Instead, we look at your site first, from pictures or a survey, and then give you a fixed quote. To get going, give us a ring on 0345 646 2711, or email photos.
Related advice
Different parts, different methods
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. They’re cleaned using methods that won’t bend or flatten the fins.
Rooftop and plant room units
Units on roofs and in plant rooms can be awkward to reach. We plan safe access as part of the survey, before we quote.
What happens if it’s left?
Standing water in a drain tray doesn’t clear itself. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Clearing it now is a much smaller job. Planning ahead in New Southgate lets you pick a quiet night rather than lose a busy one.
One small site or a whole estate, we price it on the same basis: what needs doing, how we get to it and when. The price is fixed before any work starts.
What you get with us
- We diagnose before we treat
- Out-of-hours work and a 24/7 emergency line
- One number for every site across the South East and London
- In business since 2009
See our cost guide or our accreditations.
For landlords and multi-site operators
We work for landlords, managing agents and facilities managers as well as the people running the site. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we can quote for the whole system.
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Each site gets its own report and photos, so each one has its own record.
What AHU cleaning looks like in New Southgate
Going by the FSA’s register, there are about 41 schools, colleges and universities and about 46 care, childcare and hospital premises serving food within about 1.5 miles of central New Southgate. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. In London, ventilation plant is often on the roof or below ground, so the work is typically done out of hours. About 1 mile south-west of New Southgate is Coppetts Wood Hospital, the nearest hospital. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Healthcare ventilation, from large hospitals like Coppetts Wood Hospital (about 1 mile south-west) to small clinics, depends on clean filters, coils and ducts. Workplaces around New Southgate station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts. Classrooms and halls at schools such as St Paul's CofE Primary School N11 are easiest to work in when pupils are away.
New Southgate is about 2 miles north-east of Finchley, in Greater London. From the centre of New Southgate to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. New Southgate is one of 764 places in Greater London where we work for AHU cleaning. We also work in London, around 8 miles away.
Work in N11, N10 and N14 is surveyed, quoted and booked the same way as anywhere else. You will find streets such as High Road, Orion Road and Atlas Road, all of which we cover for AHU cleaning. Main roads around New Southgate include the A1003 and A1110, which makes travel easy for AHU cleaning. Other places close to New Southgate include Friern Barnet (1 mile west), Arnos Grove (1 mile east), Bounds Green (1 mile south-east), Brunswick Park (1 mile north) and Southgate (1 mile north). Further out, we also cover London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south-east).
Near you in New Southgate
Locally, jobs take us to businesses close to Friern Barnet School, Ming-Ai and The Ranelagh pub. Other local landmarks include O. R. Tambo Recreation Ground (0.9 miles south-east) and Francis Skaryna Belarusian Library and Museum (1.8 miles west). New Southgate has its own railway station: New Southgate station. Well-known places in the area include Grand Arcade (1.5 miles west) and Broomfield House Museum (1.1 miles east). Open spaces near New Southgate include Barfield Allotments Nature Park and Highgate Hill.
When it’s something else
We’ll always give you a straight diagnosis, so here’s what this work cannot put right:
- A system that is undersized for the building
- Damaged coils beyond cleaning
- Controls and BMS settings that run the unit
If in doubt, phone us on 0345 646 2711, or email photos and we will say what we think before you book.
Parts of the system we cover
- Supply and extract fans
- Heating and cooling coils
- Filter sections
- Drain trays
- Internal panels
- Dampers and louvres
Also near New Southgate
Other services in New Southgate
Questions from New Southgate
Can you work in New Southgate outside opening hours?
Yes, nights and weekends are routine for us. It means the site in New Southgate keeps running as normal. Let us know the hours you are closed and we will book within them.
Do you do school ventilation cleaning in New Southgate in the summer holidays?
Yes, holiday work suits schools best. Around New Southgate, the Food Standards Agency lists about 41 schools and colleges with registered kitchens within a mile and a half or so. Tell us your holiday dates and we’ll book the visit for when the site is empty.
Do you work in New Southgate?
Yes. We work in New Southgate and across Greater London, within our South East and London area. To book, phone us on 0345 646 2711, or send details by email.
How much does AHU cleaning cost in New Southgate?
Every site is different, so each gets its own fixed quote. To get one, call 0345 646 2711, or email photos and tell us about the site and its opening hours.
Do you have insurance?
Yes. We carry full insurance and have been trading since 2009.
Can you clean the ducts connected to the AHU?
Yes. We clean supply and extract ductwork to TR19® Air as well. It’s often worth doing both at once, and we can quote for both.
How do you protect the area?
We start with protection: floor sheeting and covers over nearby surfaces and equipment. We tidy up and take our waste away before we leave.
What is TR19?
TR19® is the BESA specification for keeping ventilation systems clean. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
Keeping the system healthy
Simple habits between visits make a real difference. We recommend:
- Make sure condensate is draining away
- Keep inspection doors on the unit in good order
- Keep filter changes on time and recorded
- Note any water around the unit or leaks below it
Stick to the filter change schedule, as that does more than anything to keep the unit clean. Log every change so it’s easy to see when the next is due.
Do not let leaves, litter or stored materials build up near the fresh air intake. Anything around the intake is likely to be drawn in.