Essex · Air handling unit cleaning
AHU Cleaning in Birch
Our technicians work in Birch on cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Fixed quotes, work around your opening hours and photo reports on every job.
- Debris and leaves in the fresh air intake
- Odours coming through the supply air
- Fan sections that haven’t been cleaned in years
AHU cleaning for kitchens and businesses in Birch
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. The work covers heating and cooling coils, dampers and louvres and filter sections, and common reasons people get in touch are debris and leaves in the fresh air intake and dust built up on fan impellers.
Work in a small place like Birch starts with agreeing access and timings.
The paperwork matters as much as the work. Each visit is written up with photos, listing what was done, anything we couldn’t reach and when the next visit is due. File it in your maintenance log so it’s ready for an insurer, fire officer or EHO.
- Place
- Birch (CO2)
- Region
- Essex
- Reporting
- Photo report after each visit
- Price
- A fixed quote up front
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Why it’s worth doing now in Birch
Cleaning a unit while it only has light dust is quick. Leave it for years and dirt bakes onto coils and casings, especially where there’s been moisture. With notice, the visit to Birch can be fitted around your bookings and events.
When the work has to happen, how we reach it and how big the site is all affect the cost. Each of those is built into the quote, and the price is fixed before we start.
Why book with us
- Fully insured
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- In business since 2009
- One contact for all your sites in London and the South East
What we do, step by step
Everything the job needs comes with us, including protection sheets, the right tools and access kit. You only need to give us clear access and switch off what needs to be off. On site, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. A few photos of the system help us make the most of a visit to a place like Birch.
- We agree a shutdown window that suits the building.
- We take before photos of each section of the unit.
- 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.
Preparing for the visit
- Let us know when the site is closed or quiet
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Clear loose items from the work area
Get a fixed quote
There’s no standard price list, because no two systems are the same. We look at your system first, from pictures or on a visit, then send a fixed quote. To start, phone us on 0345 646 2711 or use the quote form.
Related advice
Nearby places to Birch
More services for Birch
Keeping the system healthy
Good habits slow the build-up between visits. Our tips:
- Plan the next inspection before the last report gets filed away
- Change filters on schedule and log each change
- Note any water around the unit or leaks below it
- Keep inspection doors on the unit in good order
The ducts served by the unit may need attention too. A clean unit feeding dirty ducts only solves half the problem, and we can quote for both.
Make sure access doors and panels on the unit open easily. If a section is hard to get into, it tends not to get checked.
Questions from Birch
Is Birch in your area for AHU cleaning?
Yes, Birch is covered. Just phone us on 0345 646 2711 or send us an email with a few details of the site.
Can the work in Birch be done at night or at weekends?
Yes, nights and weekends are routine for us. It means the site in Birch keeps running as normal. Your opening times are the first thing we ask for.
How long will the unit be out of action?
It takes one overnight shift for many single units, with bigger plant phased. Size, layout and how dirty it is decide the rest, and we’ll confirm the time when we quote.
How much does AHU cleaning cost?
We do not publish prices, because the cost depends on the job: the size of the system, its condition, access and when we can work. We fix the price before we start.
What is TR19?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It isn’t legislation, but it’s the standard people check against.
How often should an air handling unit 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.
Is there a report after cleaning?
Yes. You receive a certificate and a report showing each section before and after, with any faults we noticed.
Do you look at the system first?
Yes, every time. We diagnose before we treat: the survey shows what needs doing and what access we need and the fixed quote is built on it.
For landlords and multi-site operators
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We can quote either party and send the paperwork to whoever needs it.
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.
Common problems we fix in Birch
No filter stops everything. What gets through settles on coils, fans and the inside of the casing, building up layer by layer.
The symptoms we’re asked about most are:
- Dirty filters cutting the airflow
- Dirty coils holding back the airflow
- Air handling units never cleaned inside
- Rooms that smell stuffy when the system runs
Classrooms and halls at schools such as Birch Church of England Voluntary Aided Primary School are easiest to work in when pupils are away.
What to look for in a quote
- How VAT is shown on the quote
- How areas they can’t reach will be recorded
- What records you’ll receive afterwards
- Whether the whole system is included, or only the parts that are easy to reach
What AHU cleaning looks like in Birch
Birch is about 46 miles from central London, well within the area we cover across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site. For Birch, the closest hospital is Essex County Hospital, roughly 4.2 miles north-east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Healthcare buildings such as Essex County Hospital, about 4.2 miles north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Birch, yours matters too.
Birch is about 5 miles south-west of Colchester, in Essex. We carry out AHU cleaning for businesses, landlords and public buildings in Birch and the rest of Essex. Birch is one of 644 places in Essex where we work for AHU cleaning. We also work in Chelmsford, around 16 miles away.
Work in CO2 is surveyed, quoted and booked the same way as anywhere else. Nearby, we also carry out AHU cleaning in Birch Green (1 mile south), Layer Breton (1 mile south), Heckfordbridge (1 mile north), Layer-de-la-Haye (2 miles east) and Copford Green (2 miles north-west). Further out, we also cover Colchester (5 miles north-east), Braintree (11 miles west), Clacton-on-Sea (14 miles east), Maldon (10 miles south-west), Witham (8 miles west) and Camulodunum (4 miles north-east).
Landmarks near Birch
Locally, jobs take us to businesses close to Hare And Hounds Public House. Birch’s nearest station is Marks Tey station, roughly 3 miles north-west. Nearby you’ll also find Birch Castle (under half a mile south-east) and Anchor Press Museum (3.5 miles south-west). Not far away are Roman River Valley.
What your team can do, and what needs us
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. That’s our job.
Keep a record of what your team does. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
When something else is needed
AHU cleaning can’t fix everything, and we will tell you before we start. It won’t put right:
- Leaking heating or cooling coils
- A system that’s undersized for the building
- Breakdowns that need a mechanical engineer
If in doubt, give us a ring on 0345 646 2711, or send details by email and we’ll say what we think.
Where we work
- Drain trays
- Internal panels
- Supply and extract fans
- Heating and cooling coils
- Filter sections
- Dampers and louvres