Essex · Air handling unit cleaning
Air handling unit cleaning in Greensted, Essex
We cover Greensted for air handling unit cleaning. Fixed quotes, work around your opening hours and photo reports on every job.
- Odours coming through the supply air
- Air handling units with blocked filters
- Drain trays holding standing water
How we handle AHU cleaning in Greensted
Our AHU cleaning covers sites in Greensted and the rest of Essex, in buildings such as offices, schools, healthcare sites and shops. Units are cleaned when the site can spare them, often evenings, overnight or weekends. Common call-outs are for blocked condensate drains and slimy trays and odours coming through the supply air, across heating and cooling coils, drain trays and supply and extract fans.
Somewhere as small as Greensted, ducted ventilation is typically limited to a school, a care home, a surgery or a converted business building, wherever there is one, but where it’s fitted, it needs the same inspection and cleaning as anywhere.
The report is your system’s health record: dated, with photos, and showing what was done. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal and sits alongside the report.
- Place
- Greensted (CM5)
- Region
- Essex
- Records
- Written report with photos
- Price
- A fixed quote up front
- When we work
- Out of hours as standard, 24/7 emergency line
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What the work involves, part by part
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. As part of the clean, filters are checked and cleaned or replaced as agreed, and clean the filter housing.
Internal casing and panels
Loose or damaged linings inside a unit can break up into the airstream. We note any we find in the report.
Also near Greensted
More services for Greensted
Do you need AHU cleaning in Greensted?
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.
Clients normally contact us when they notice something like this:
- Rooms that smell stuffy when the system runs
- Blocked condensate drains and slimy trays
- Dirty fans and fan housings
- Units that have only ever had filter changes
Healthcare ventilation, from large hospitals like St. Margaret's Hospital (about 4.4 miles west) to small clinics, depends on clean filters, coils and ducts.
Before booking anyone
- Exactly which parts of the system are covered
- Whether VAT is included
- Which accreditations they hold, and whether you can check them
- Whether the figure could change on the day
Common questions in Greensted
Can ventilation in schools around Greensted be cleaned out of term?
Yes, and it’s the easiest time to do it. There are about 3 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Greensted. Just call 0345 646 2711 or send us an email with your term dates and we will plan around them.
Can you get to a site in Greensted?
Yes, smaller places are covered as well as towns. Photos of the system and directions to the site help us plan the visit.
What accreditations do you have?
CHAS, SafeContractor, ISO 9001 and BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. We’ve been trading since 2009 and we’re fully insured.
How much notice should we give?
The more notice, the better, especially for out-of-hours work. We usually quote within one working day, and emergencies are covered by our 24/7 line.
Do you offer emergency callouts?
Yes, any time. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we’ll advise on what to do next.
Will the ventilation be off while you clean?
Yes. The unit has to be shut down and isolated before it’s opened. The shutdown is planned with whoever runs the building.
Where does the waste go?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on, so it does not spread.
What does TR19 mean?
BESA’s ventilation hygiene specification, with two parts that matter most here: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It is not law, but it’s the benchmark.
Ventilation in Greensted buildings
Going by the FSA’s register, there are about 3 schools, colleges and universities and about 4 care, childcare and hospital premises serving food in and around Greensted, up to about a mile and a half out. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. For Greensted, the closest hospital is St. Margaret's Hospital, roughly 4.4 miles west. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. Greensted, about 20 miles from central London, is within our usual area. Visits are booked around your hours, evenings and weekends included.
For schools like Chipping Ongar Primary School, the holidays are the usual time to inspect and clean ventilation.
Greensted is about 5 miles east of Epping, in Essex. We provide AHU cleaning for businesses, landlords and public buildings in Greensted and the rest of Essex. 644 places in Essex are on our list, large and small. Our Chelmsford page covers sites nearby (11 miles or so).
Every address in CM5 is covered for AHU cleaning, from busy streets to back roads. If your site is just outside Greensted, we cover Chipping Ongar (1 mile east), Greensted Green (1 mile west), Shelley (1 mile north-east), High Ongar (2 miles east) and Bobbingworth (2 miles north). We also work in nearby towns such as Chelmsford (11 miles east), Basildon (13 miles south-east), Harlow (7 miles north-west), Brentwood (6 miles south-east), Billericay (10 miles south-east) and Loughton (8 miles south-west).
Near you in Greensted
We work in commercial kitchens and buildings around Two Brewers Public House and The Ongar Academy, among other places. Other landmarks nearby include St. Margaret's Hospital (4.4 miles west). Not far away are Gernon Bushes.
How the visit works
Before we leave, we walk the area with whoever is on site. We point out anything that couldn’t be reached or needs a follow-up, and the same goes into the written report. All told, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. The timing of a visit to Greensted is set by you, and the travel is our side of the planning.
- We survey the unit from photos or on site and agree what’s included.
- We arrange the shutdown with your staff and sheet the area.
- Filters, coils, fan section and casing are cleaned in turn.
- Drain trays are cleared and cleaned and the outlet checked.
- You get a TR19® certificate and a photo report.
How to prepare
- Arrange a key holder or contact on site
- Let us know how we reach the system, including roofs, risers and plant rooms
- Let us know about permits to work or site inductions
How to get a quote
Quotes are quick. Call or email with a few details and you will usually have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Read more
When it’s something else
We won’t sell you work that does not address the problem, so here are the limits:
- Breakdowns that need a mechanical engineer
- Damaged coils beyond cleaning
- Building management system faults
Not sure which it is? You can call 0345 646 2711, or email photos and we’ll tell you honestly.
Where we work
- Filter sections
- Heating and cooling coils
- Dampers and louvres
- Internal panels
- Supply and extract fans
- Drain trays
Looking after it afterwards
A little care between visits keeps the system in better shape. Our advice:
- Do not ignore odours coming through the grilles
- Report water on the plant room floor
- Make sure condensate is draining away
- Store the TR19 paperwork where auditors can find it
The report suggests a date for the next inspection or clean, based on what we found. Under TR19® Air the timing is set by inspection and risk, not a fixed calendar.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
What your team can do, and what needs us
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease call for the right kit, training and safe access. Leave those to us.
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We can diagnose it and quote.
Why it’s worth doing now in Greensted
Standing water in a drain tray doesn’t clear itself. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Clearing it now is a much smaller job. If the system at a site near Greensted fails, there may be nowhere nearby to move to.
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all play a part.
Why choose Duct Doctor in Greensted
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Fixed quotes from a survey or pictures
- CHAS and SafeContractor accredited, with ISO 9001
- Full insurance on every job
Read our cost guide and our accreditations and certificates.