Essex · Air handling unit cleaning
Nine Ashes AHU cleaning
Professional AHU cleaning in and around Nine Ashes, timed so the site keeps working and finished with a written report and pictures.
- Air handling units never cleaned inside
- Blocked condensate drains and slimy trays
- Plant that needs cleaning after a refit
When it’s something else
An honest diagnosis matters more to us than a booking, so here’s what this work can’t put right:
- Building management system faults
- A system that’s undersized for the building
- Leaking heating or cooling coils
Not sure which it is? You can call 0345 646 2711, or send details by email and we’ll tell you honestly.
Parts of the system we cover
- Heating and cooling coils
- Supply and extract fans
- Internal panels
- Filter sections
- Drain trays
- Dampers and louvres
AHU cleaning in Nine Ashes, done properly
We clean the parts of the unit where dirt and moisture gather: the filter section, heating and cooling coils, drain trays, fan and casing. Every clean comes with a TR19® certificate and before and after pictures in a report. Typical jobs include dirty filters cutting the airflow and intake sections clogged with outdoor debris, across internal panels, dampers and louvres and supply and extract fans.
Somewhere as small as Nine Ashes, ducted ventilation is normally limited to a school, a care home, a surgery or a converted business building, wherever there is one, but those that do need it inspected and cleaned like any other.
The paperwork matters as much as the work. You get a written report with photos after every visit, listing what was done, anything we couldn’t reach and when the next visit is due. Keep it with your fire safety records so it’s to hand when an insurer or inspector asks.
- Where
- Nine Ashes (CM4)
- Wider area
- Essex
- Records
- Photo report after each visit
- Price
- A fixed price before work begins
- Working hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Multi-site and managed buildings
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we are happy to quote for all of it.
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.
What the work involves, 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.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. The intake section gets particular attention.
AHU cleaning around Nine Ashes
About 5.4 miles south of Nine Ashes is Brentwood Community Hospital, the nearest hospital. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. Nine Ashes, about 22 miles from central London, is within our usual area. Visits are booked around your hours, evenings and weekends included.
If you run a surgery, dental practice or care home near Nine Ashes, clean ventilation matters as much to you as to a hospital like Brentwood Community Hospital (about 5.4 miles south).
Nine Ashes is about 5 miles north of Brentwood, in Essex. Nine Ashes gets the same approach as every site we work on: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with pictures. Nine Ashes is one of 644 places in Essex where we work for AHU cleaning. For sites nearby, see our Chelmsford page, about 8 miles away.
All of CM4 is within our area for AHU cleaning, from the main roads to the quietest streets. If you need AHU cleaning at premises on Rookery Road and Nine Ashes Road or a nearby road, we can help. Other places close to Nine Ashes include Norton Heath (1 mile north), Radley Green (2 miles north-east), Willingale (3 miles north), Loves Green (3 miles east) and Berners Roding (3 miles north). Larger places within reach include Chelmsford (8 miles east), Basildon (11 miles south-east), Harlow (9 miles north-west), Brentwood (5 miles south), Billericay (7 miles south-east) and Rayleigh (15 miles south-east).
Around Nine Ashes
Locally, jobs take us to businesses close to The Bull Inn, among other places. For rail, the closest station is Ingatestone station, about 4.1 miles south-east of the centre. A little further out are Brentwood Community Hospital (5.4 miles south) and Willingale Doe (3.4 miles north).
What happens if it’s left?
If people in a building in Nine Ashes complain about stuffy or smelly air, the AHU is worth looking at. Cleaning it deals with the cause rather than the symptom. In a place like Nine Ashes, ductwork and fans are easy to forget until something goes wrong.
Every site is different, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all play a part.
Why us?
- Fixed quotes, typically within one working day
- A written report with pictures after each visit
- Evenings, overnight and weekends, plus 24/7 emergency callout
- In business since 2009
Read what affects the cost and our accreditations.
What happens on the day
A visit follows the same order every time: protect the area, make the system safe, do the work, clear away and leave you the report. On site, the work takes half a day to a full day per unit, with large plant planned over several shifts. If the van will struggle with a lane or gateway near Nine Ashes, let us know and we will plan around it.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Drain trays are cleared and cleaned and the outlet checked.
- A TR19® certificate and photo report follow the clean.
How to prepare
- Plan for cooking equipment or plant to be off before we arrive
- Let us know how we reach the system, including roofs, risers and plant rooms
- Let us know when the site is closed or quiet
Get a fixed quote
To help us quote: where the site is, what it is and its opening hours, a few photos and the last certificate or report, if there is one. Once you have those, call 0345 646 2711, or send details by email.
Related advice
Keeping the system healthy
So the system stays in good health:
- Report musty smells from the vents right away
- Store the TR19 paperwork where auditors can find it
- Report stiff or damaged access doors
- Look at the condensate drain whenever the unit is serviced
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.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
Questions from Nine Ashes
Is Nine Ashes within the area you cover?
Yes, smaller places are covered as well as towns. A survey first, from photos or a visit, means we arrive with the right kit.
Is AHU cleaning available in Nine Ashes?
Yes. We work across London and the South East, and Nine Ashes is part of that. Just give us a ring on 0345 646 2711, or email photos with a few details of the site.
What is TR19?
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.
What do you need from me for a quote?
Only a few details: where it is, what kind of site, when it’s open and the access. Photos and any previous paperwork make it quicker. Then phone us on 0345 646 2711 or use the quote form.
How far ahead should we book?
Book as early as you can for planned work, particularly if your next visit is nearly due. For emergencies, we take calls 24/7.
Which sectors do you work in?
Any commercial site with kitchens or ventilation, from a single café to a large school. We work with hotels, schools, care homes, offices, retail and leisure sites.
What do you do to protect the area?
We cover floors and nearby surfaces with sheeting before work begins, and waste is contained as we go. Before we leave, we tidy up and clean down.
When should our AHU next be cleaned?
Under TR19® Air, cleaning is led by inspection and risk rather than a set calendar. Each report suggests when the unit should next be looked at.
Common problems we fix in Nine Ashes
Mechanical servicing keeps a unit running, but it does not always include cleaning the inside. So a unit can be well maintained and still dirty.
These are the problems we see most often:
- Stale or musty smells from the ventilation
- Condensate trays that won’t empty
- Filters that are clogged or overdue
- Air handling units due a clean after building work
Classrooms and halls at schools such as Blackmore Primary School are easiest to work in when pupils are away.
What to look for in a quote
- What happens if part of the system cannot be accessed
- Whether they recommend a next date
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Whether they’re fully insured