Essex · Air handling unit cleaning
Mashbury AHU cleaning
AHU cleaning in Mashbury from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Blocked condensate drains and slimy trays
- Dust-coated heating and cooling coils
- Odours coming through the supply air
AHU cleaning for kitchens and businesses in Mashbury
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, right in the path of the air going into the building. Clearing and cleaning the tray is central to every AHU clean. The work covers drain trays, internal panels and filter sections, and people most often call us about dirty coils holding back the airflow and odours coming through the supply air.
In a village or hamlet like Mashbury, few buildings have mechanical ventilation, but where it’s fitted, it needs the same inspection and cleaning as anywhere.
Every visit ends with a written report and photos, so you have a record of what was done and when. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Where
- Mashbury (CM1)
- Wider area
- Essex
- Reporting
- Report and pictures after the visit
- Price
- A fixed price before work begins
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Updated
- 30 October 2026
What a clean won’t put right
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It won’t put right:
- Leaking heating or cooling coils
- The supply and extract ducts, quoted separately
- Ventilation that was badly designed in the first place
If in doubt, call us on 0345 646 2711, or email photos and we’ll say what we think.
Where we work
- Internal panels
- Heating and cooling coils
- Drain trays
- Filter sections
- Supply and extract fans
- Dampers and louvres
Staff cleaning versus specialist work
Staff cleaning and specialist work aren’t the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but they do not reach the grease that builds up further in. That part needs specialist access and equipment.
Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Looking after it afterwards
A little care between visits keeps the system in better shape. We recommend:
- Do not store bins or materials near the intake
- Report stiff or damaged access doors
- Stick to the filter change plan
- Flag stale or damp smells in the supply air
If the ductwork hasn’t been cleaned, consider it next. A clean unit feeding dirty ducts only solves half the problem, and we can quote for both.
Regular inspection under TR19® Air shows when cleaning is due, rather than waiting for a problem.
How the visit works
Your staff do not need to do much on the day. A contact on site lets us in at the agreed time and points us to the system, and the rest is down to us. Afterwards, the area is left tidy and the written report follows. In a small place like Mashbury, the journey is planned ahead and the visit arranged around the site’s hours.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- You get a TR19® certificate and a photo report.
Before we arrive
- Arrange a key holder or contact on site
- Move anything stored near the system
- Find the previous report, if there is one
Getting a quote
For AHU cleaning in Mashbury, phone us on 0345 646 2711, or send details by email. Let us know the site type and the opening hours, plus pictures or the previous report if they’re to hand. We normally send a fixed quote within one working day.
Read more
Different parts, different methods
Internal casing and panels
Damaged internal linings or loose panels can shed material into the air. We note any we find in the report.
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. We clean them with care so the fins are not damaged.
Towns and villages near Mashbury
What else we do in Mashbury
Mashbury buildings and their air
Broomfield Hospital is the nearest hospital, about 3.3 miles east of Mashbury. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. We cover Mashbury, about 29 miles from central London, as part of our work across London and the South East. The visit is fixed around your opening hours, not ours.
An inspection comes first for any ventilation job around Mashbury, so the cleaning matches what’s there.
Mashbury is about 5 miles north-west of Chelmsford, in Essex. Across the CM1 area, we cover AHU cleaning for commercial sites. Mashbury is one of 644 places in Essex where we work for AHU cleaning.
Here we cover the CM1 postcode area for AHU cleaning. Streets in the area include Mashbury Road and Barrack Road, all of which we cover for AHU cleaning. We also cover the places around Mashbury: Good Easter (2 miles west), Chalk End (2 miles south-west), Boyton Cross (2 miles south), Roxwell (3 miles south) and Margaret Roding (3 miles west). Larger places within reach include Chelmsford (5 miles south-east), Basildon (15 miles south), Braintree (10 miles north-east), Harlow (12 miles west), Brentwood (12 miles south) and Maldon (13 miles east).
What’s near Mashbury
The closest station to Mashbury is Chelmsford station, about 4.9 miles south-east. Well-known places in the area include Broomfield Hospital (3.3 miles east) and Willingale Doe (4.2 miles south-west). The countryside around Mashbury includes Little Waltham Meadows.
Mashbury questions
Is AHU cleaning available in Mashbury?
Yes, Mashbury is covered. You can phone us on 0345 646 2711 or email us and let us know what needs doing.
Do you work overnight in Mashbury?
Yes, we can come after you close and finish before you open. Your customers, staff or residents in Mashbury needn’t be disturbed. When you call 0345 646 2711, or send details by email, mention when the site is quiet.
Is there a survey before the work?
Yes, always. Diagnosis comes before treatment: the survey tells us what the system needs and how to reach it, and the quote is based on that.
Can you set up regular visits?
Yes. Tell us what you have and how it’s used and we will propose a schedule with a fixed quote.
Can you clean the ducts connected to the AHU?
Yes. We reach the ducts through access panels, with anything inaccessible recorded, with new panels fitted where necessary.
Which accreditations do you hold?
BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001. We have been trading since 2009 and we are fully insured.
What do you do with what you remove?
We take it away at the end of the visit. During the work, it’s contained to keep the area clean.
How long will the unit be out of action?
Typically the clean takes anything from half a day for one small unit to several shifts for a plant room full of them. We plan the shutdown around that, including evenings or weekends.
Why deal with it now?
Leave an AHU uncleaned and the dirt doesn’t stay put. It moves on into the ductwork and out into the rooms, so cleaning the ducts without the unit only goes so far. In a place like Mashbury, ductwork and fans are easy to forget until something goes wrong.
The price reflects the work, not guesswork. That’s why we survey first, from photos or on site, and the price is agreed before we start.
What you get with us
- Trading since 2009
- Survey first, then a fixed quote
- A single point of contact for sites across the South East and London
- CHAS and SafeContractor accredited, with ISO 9001
Read how cleaning jobs are priced or how to check a contractor.
Common problems we fix in Mashbury
Wherever there’s a cooling coil, there’s condensate. If the drain tray outlet blocks or the tray doesn’t fall properly, water stands in it, and slime and smells soon follow.
The symptoms we are asked about most are:
- Plant that needs cleaning after a refit
- Debris and leaves in the fresh air intake
- Dirty filters cutting the airflow
- Blocked condensate drains and slimy trays
Healthcare ventilation, from large hospitals like Broomfield Hospital (about 3.3 miles east) to small clinics, depends on clean filters, coils and ducts.
What your quote should include
- What hours they’ll be on site
- Whether inaccessible sections are listed on the report
- Which accreditations they hold, and whether you can check them
- Whether they’re fully insured