Essex · Air handling unit cleaning
Stock AHU cleaning
AHU cleaning in Stock from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Plant that needs cleaning after a refit
- Coils clogged with dust and debris
- Plant that has been serviced but not cleaned
What the work involves, part by part
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. We clean the impeller, housing and surrounding section.
Filters
Clogged filters reduce airflow, and dirt can get round the edges. We clean the frames and rails so the filters sit tight.
How we handle AHU cleaning in Stock
Where a building in Stock has had little more than filter changes, the coils, fan and casing can be carrying far more dirt than anyone has seen. A full AHU clean takes in the whole unit. Common call-outs are for stale or musty smells from the ventilation and debris and leaves in the fresh air intake, on supply and extract fans, dampers and louvres and drain trays.
Work in a small place like Stock starts with agreeing access and timings, and the ventilation is inspected, cleaned and recorded the same as anywhere.
The sign-off is always in writing: a written report, dated and illustrated with pictures, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Where
- Stock (CM4)
- Wider area
- Essex
- Records
- Photo report after every visit
- Quotes
- A fixed quote up front
- Working hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
The process
There’s very little for your team to do on the day. Someone lets us in at the agreed time and shows us where everything is, and we take it from there. Before we leave, the area is tidied and the paperwork follows. Somewhere as small as Stock, the date and timings are agreed with you well before the day.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- The unit is closed up and handed back, with a report to follow.
Before we arrive
- Tell us about site rules, permits or sign-in
- Tell us the best time to work, such as after service or at a weekend
- Let us know how we reach the system, including roofs, risers and plant rooms
Get a fixed quote
Quotes are quick. Send a few details and pictures, and we typically reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
Advice
Stock questions
Can you do AHU cleaning in Stock?
Yes, we work in Stock and the places around it. Get in touch with the details and we’ll arrange a survey.
Can you come to Stock after we close?
Yes, we can come after you close and finish before you open. The work in Stock can fit around your hours. Just call us on 0345 646 2711 or email us with your opening times and we’ll plan around them.
Do you look at the system first?
Yes, every time. Diagnosis comes before treatment: the survey tells us what the system needs and how to reach it, and the quote is based on that.
Do you offer emergency callouts?
Yes. Our emergency line runs 24/7, for problems that cannot wait. Call us any time and explain what’s happened.
Where does the waste go?
Anything we remove is contained as we work and taken away with us, including grease, debris and dirty water. We do not leave it behind.
What do you clean inside the unit?
Every section that collects dirt: filters, coils, tray, fan and panels. The survey confirms what’s in your unit before we quote.
Do you offer maintenance contracts?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. The report from each visit recommends the next date.
How do you keep the site clean during the work?
We cover floors and nearby surfaces with sheeting before any work starts, and anything we remove is contained. At the end, the area is cleaned down.
When to call us in Stock
Filters catch most of the dust, but not all of it. The fine dust that passes the filters lands on the coils, the fan and the internal panels, a little more each month.
These are the problems we see most often:
- Dirty fans and fan housings
- Leaves and litter drawn into the unit
- Rooms that smell stuffy when the system runs
- Dirty coils holding back the airflow
For schools like Stock Church of England Primary School, the holidays are the usual time to inspect and clean ventilation.
What your quote should include
- Exactly which parts of the system are covered
- Whether the quote is based on a survey or photos
- Whether the work can be done while the site is closed
- What records you’ll receive afterwards
Nearby places to Stock
What else we do in Stock
For landlords and multi-site operators
Whether it’s one building or many, the standard is the same: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
If you look after several sites, we can schedule visits across all of them on one quote. Each site gets its own report and photos, so records stay tidy.
Between visits
Here’s the after-treatment advice, short and simple:
- Watch for drips or damp patches near the plant
- Flag stale or damp smells in the supply air
- Store the TR19 paperwork where auditors can find it
- Change filters on schedule and log each change
Stick to the filter change schedule, as that does more than anything to keep the unit clean. Record each change in the maintenance log.
Don’t let leaves, litter or stored materials build up near the fresh air intake. Anything around the intake is likely to be drawn in.
Ventilation in Stock buildings
For Stock, the closest hospital is Mayflower Community Hospital, roughly 3.4 miles south-west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. We cover Stock, about 26 miles from central London, as part of our work across London and the South East. Visits are booked around your hours, evenings and weekends included.
Healthcare ventilation, from large hospitals like Mayflower Community Hospital (about 3.4 miles south-west) to small clinics, depends on clean filters, coils and ducts.
Stock is about 3 miles north-east of Billericay, in Essex. Every kind of commercial site in Stock, we can take on AHU cleaning. Visits can be booked for evenings, overnight or weekends so the site keeps running. Our area takes in 644 places across Essex, from busy centres to quieter spots.
Here we cover the CM4 postcode area for AHU cleaning. If you need AHU cleaning at premises on The Square, High Street and Webster Place or a nearby road, our technicians can take on the work. We also cover the places around Stock: Margaretting Tye (2 miles north), Ramsden Heath (2 miles south-east), Margaretting (2 miles north-west), Downham (3 miles south-east) and Billericay (3 miles south-west). We also work in nearby towns such as Chelmsford (5 miles north), Basildon (6 miles south), Brentwood (7 miles south-west), Maldon (11 miles north-east), Canvey Island (11 miles south-east) and Rayleigh (8 miles south-east).
Around Stock
Around Stock, our work takes us to kitchens and buildings near The Hoop Public House and Mayflower High School. For rail, the closest station is Billericay station, roughly 2.7 miles south-west of the centre. A little further out are Mayflower Community Hospital (3.4 miles south-west). Not far away are Norsey Wood.
How we price AHU cleaning
The diagnosis comes before the price. The main factors are:
- The scale of the work
- Whether several sites go on one quote
- The times the site is available
- The condition we find in the survey
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 will explain each part.
What we need to know
You don’t need the technical terms. It helps if you can send:
- Your opening hours and when the area is out of use
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- Your last certificate, test record or report
- Detail shots of panels, filters and grilles
For a fixed quote, call us on 0345 646 2711, or email photos and tell us the type of site, your opening hours and roughly what the system looks like. A few photos and your last certificate or report help a lot. You will usually have a quote within one working day.
When it’s something else
We won’t sell you work that does not address the problem, so here are the limits:
- Faulty motors, drives or bearings
- Leaking heating or cooling coils
- Building management system faults
If in doubt, give us a ring on 0345 646 2711 or use the quote form and we’ll say what we think.
What the work covers
- Heating and cooling coils
- Drain trays
- Dampers and louvres
- Filter sections
- Internal panels
- Supply and extract fans