Hertfordshire · Air handling unit cleaning
Hunsdon AHU cleaning
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for Hunsdon, with a survey first and a report with photos at the end. Call for a fixed quote.
- Dust built up on fan impellers
- Leaves and litter drawn into the unit
- Coils clogged with dust and debris
AHU cleaning in Hunsdon, done properly
Drain trays under cooling coils are meant to empty. 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. If you are dealing with coils clogged with dust and debris and units that have only ever had filter changes, we can put it right.
In a village or hamlet like Hunsdon, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
Accreditations are easy to claim and worth checking. We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Where
- Hunsdon (SG12)
- Wider area
- Hertfordshire
- Records
- Report and photos after the visit
- Price
- A fixed quote up front
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
Multi-site and managed buildings
We work for landlords, managing agents and facilities managers as well as the people running the site. 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.
Multi-site operators often want one contractor and one number. We cover South East England and London, so visits at different addresses can be planned together and kept to a regular schedule.
Hunsdon buildings and their air
We cover Hunsdon, about 22 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. For Hunsdon, the closest hospital is Princess Alexandra Hospital, roughly 2.8 miles south-east. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
School buildings such as Hunsdon Junior Mixed and Infant School are usually done in the holidays, so classrooms aren’t disturbed.
Hunsdon is about 4 miles north-west of Harlow, in Hertfordshire. If you need AHU cleaning in Hunsdon, please give us a ring on 0345 646 2711, or send details by email for a fixed quote. Our area covers London and the South East, including Hunsdon. Our Hertfordshire coverage runs to 381 places, and Hunsdon is one of them. We also work in Chelmsford, around 19 miles away.
We cover every part of the SG12 postcode area for AHU cleaning and the streets around it. Streets in the area include High Street, Cunningham Grove and Wicklands Road, and we cover them all for AHU cleaning. Close by, we work in Hunsdonbury (1 mile south), Widford (1 mile north), Nether Street (1 mile north), Wareside (2 miles north-west) and Babbs Green (2 miles north-west). Within a short drive, we also cover Stevenage (12 miles north-west), Bishop's Stortford (6 miles north-east), Welwyn Garden City (11 miles west), Hoddesdon (5 miles south-west), Cheshunt (8 miles south-west) and Hatfield (13 miles west).
What’s near Hunsdon
Typical jobs here are in premises near The Crown pub and the streets around them. The nearest railway station is Roydon station, about 2.4 miles south of the centre. A little further out are Harlow Mill (3.3 miles east) and Henry Moore Studios and Gardens (2.4 miles north-east). The countryside around Hunsdon includes Hunsdon Mead.
How it 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. Seeing the system in pictures first means the trip to Hunsdon can be planned properly.
- We agree a shutdown window that suits the building.
- We take before photos of each section of the unit.
- We work through the unit from the intake to the outlet.
- The fan and drain tray are cleaned and the drain checked.
- After pictures are taken and the certificate issued.
How to prepare
- Mention any locked doors, roof access or ceiling voids
- Make sure equipment near the work can be switched off and left to cool
- Arrange a key holder or contact on site
Get a fixed quote
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. Photos and the last report, if you have one, make the quote quicker. You will normally have a quote within one working day.
Related advice
Also near Hunsdon
What else we do in Hunsdon
What we’re called out for in Hunsdon
Most units live out of sight on roofs, in plant rooms or in ceiling voids and are rarely seen by anyone but maintenance staff. It’s easy for a long time to go by without anyone opening the panels.
Clients typically contact us when they notice one of these:
- Drain trays holding standing water
- Dust built up on fan impellers
- Rooms that smell stuffy when the system runs
- Air handling units never cleaned inside
Hospitals such as Princess Alexandra Hospital (about 2.8 miles south-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Hunsdon are no different.
Comparing quotes
- Exactly which parts of the system are covered
- What happens if part of the system can’t be accessed
- How they set the interval to the next visit
- What records you will receive afterwards
What affects the cost of AHU cleaning
The quote reflects the site in front of us. We consider:
- A single visit or a regular plan
- Any permits to work or inductions
- The scale of the work
- How easy every part is to reach
What you pay reflects the actual work. That is why we survey first, from pictures or on site, and the price is agreed before work begins.
What to send for a quote
Before you ask for a quote, gather:
- Any access panels or hatches you can see
- Photos showing the whole system and its surroundings
- Any previous report or certificate
- How we’d reach plant on a roof or in a plant room
Every quote begins with a look at the system, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work, before work begins.
What a clean will not put right
We will always give you a straight diagnosis, so here’s what AHU cleaning will not do:
- Ventilation that was badly designed in the first place
- The supply and extract ducts, quoted separately
- Damaged coils beyond cleaning
Not sure which it is? You can call us on 0345 646 2711 or drop us a line and we’ll tell you honestly.
What we work on in Hunsdon
- Filter sections
- Dampers and louvres
- Supply and extract fans
- Heating and cooling coils
- Drain trays
- Internal panels
Staff cleaning versus specialist work
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. Leave those to us.
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
What the work involves, part by part
Drain trays
Standing water in a tray sits right where the air passes. We clean it and note if the slope or the drain needs attention.
Filters
Clogged filters reduce airflow, and dirt can get round the edges. The filter section is cleaned so new or cleaned filters sit properly.
Hunsdon questions
Can the work in Hunsdon be done at night or at weekends?
Yes. We work evenings, overnight and at weekends. Your customers, staff or residents in Hunsdon needn’t be disturbed. Let us know the hours you are closed and we’ll book within them.
Can you get to a site in Hunsdon?
Yes. Villages and rural sites across the South East are part of our work, Hunsdon included. Let us know about access, parking and anything unusual about getting there when you book.
Which parts of an air handling unit do you clean?
We clean the filter section, heating and cooling coils, drain trays, fan and internal casing. Filters are cleaned or changed as agreed in the quote.
Which accreditations do you hold?
We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
Is there a report after cleaning?
Yes. A TR19® certificate and photo report are sent after the clean, including anything we think needs attention.
Will the ventilation be off while you clean?
Yes, while the clean is under way. Out-of-hours work is available so the building is not left without ventilation when it’s busy.
Do you do ventilation duct cleaning too?
Yes. We reach the ducts through access panels, and any sections we can’t reach are noted in the report, and new panels can be fitted.
What do you do with what you remove?
We contain it and take it with us. We collect grease, debris and waste water as we go rather than letting it spread.