Hertfordshire · Air handling unit cleaning
Langley End AHU cleaning
AHU cleaning for Langley End and the surrounding area: diagnosis first, then a fixed quote, the work and a report with pictures. Call for a fixed quote.
- Units that have only ever had filter changes
- Dirty coils holding back the airflow
- Air handling units due a clean after building work
What staff can safely do
For ventilation and air handling systems, in-house care is mostly about checks: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. What they cannot safely do is clean inside the ductwork, the fan or the risers, and that is where we come in.
How we handle AHU cleaning in Langley End
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Clearing and cleaning the tray is central to every AHU clean. If you are dealing with dirty filters cutting the airflow and leaves and litter drawn into the unit, we can put it right.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, which makes them easy to overlook.
The sign-off is always in writing: a dated report with photos of the work, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. Any parts we couldn’t reach are recorded on it too.
- Location
- Langley End (SG4)
- Wider area
- Hertfordshire
- Paperwork
- Written report with photos
- Quotes
- A fixed price before we start
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
What affects the cost of AHU cleaning
Sites vary more than people expect. What affects the quote:
- The scale of the work
- Whether we need access equipment or extra panels
- Travel, parking and unloading
- Any permits to work or inductions
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’ll go through it with you.
Asking for a quote
To speed up the quote, send us:
- Where the site is and what kind of site it is
- How we’d reach plant on a roof or in a plant room
- Photos showing the whole system and its surroundings
- When the site is open and when it’s quiet
For AHU cleaning in Langley End, call 0345 646 2711 or drop us a line. Tell us what kind of premises it is and when it’s open, and send pictures or your last report if you can. We usually send a fixed quote within one working day.
What the work involves, part by part
Filters
Dirty filters cut airflow and let dirt slip past their frames. The filter section is cleaned so new or cleaned filters sit properly.
Drain trays
Standing water in a tray sits right where the air passes. We clean it and report anything about the tray or drain that needs fixing.
How it works
A visit follows the same order every time: protect the area, isolate whatever needs isolating, carry out the AHU cleaning, clear away and leave you the report. On site, the work takes one overnight shift for many single units, with bigger plant phased. If you can send photos, we can arrive in Langley End knowing what to expect.
- We survey the unit from pictures or on site and agree what’s included.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- Drain trays are cleared and cleaned and the outlet checked.
- You get a TR19® certificate and a photo report.
Before we arrive
- Mention any locked doors, roof access or ceiling voids
- Make sure someone can let us in and lock up afterwards
- Agree a time when the area can be out of use
Getting a quote
Here’s what helps us quote: the address, the type of site and when it’s open, pictures of the system and the last certificate or report, if there is one. Then call us on 0345 646 2711, or email photos.
Read more
When something else is needed
A few issues sit outside what this work can do:
- Dirty ducts beyond the unit itself
- Breakdowns that need a mechanical engineer
- Damaged coils beyond cleaning
If you are not sure, just call us on 0345 646 2711 or email us and we will give you a straight answer before you book.
What we work on in Langley End
- Drain trays
- Supply and extract fans
- Dampers and louvres
- Filter sections
- Heating and cooling coils
- Internal panels
Keeping the system healthy
To keep the system working properly between visits:
- Keep filter changes on time and recorded
- Clear leaves and litter away from the intake
- Report musty smells from the vents straight away
- Keep inspection doors on the unit in good order
Once the clean is done, we send a TR19® certificate and a report with before and after pictures. Keep both with the building’s maintenance records.
Make the drain tray part of every maintenance visit. A drain that is cleared early never gets to the slime stage.
Why act early in Langley End
A light clean now is simpler than a heavy one later. Years of build-up make the job longer and harder, especially where there’s been moisture. Rural sites can’t always move to another kitchen or room when something fails.
What you pay depends on the size of the system, what state it’s in and how easy it is to reach. You get a fixed price before work begins, so there are no surprises.
Why book with us
- One contact for all your sites in London and the South East
- Out-of-hours work and a 24/7 emergency line
- Fully insured
- Ventilation hygiene specialists since 2009
Langley End buildings and their air
Langley End’s nearest hospital, Lister Hospital, is about 2.6 miles north-east. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. Langley End, about 29 miles from central London, is within our usual area. A survey and a fixed quote come first, then the visit at a time that suits you.
Wherever a school like The John Henry Newman School has ducted ventilation, a half-term visit keeps the work out of lesson time. Healthcare buildings such as Lister Hospital, about 2.6 miles north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Langley End, yours matters too.
Langley End is about 3 miles west of Stevenage, in Hertfordshire. Anywhere in SG4, we can carry out AHU cleaning at your premises. Across Hertfordshire, we cover 381 places, Langley End among them. There’s also a page for Milton Keynes, about 24 miles away.
Here we cover the SG4 postcode area for AHU cleaning. If your site is just outside Langley End, we cover Poynders End (1 mile north-west), Temple Dinsley (1 mile north-west), Preston (1 mile north-west), Little Almshoe (1 mile north) and St Ibbs (2 miles north). Within a short drive, we also cover Hemel Hempstead (13 miles south-west), Stevenage (3 miles east), St Albans (11 miles south), Welwyn Garden City (8 miles south), Harpenden (7 miles south-west) and Hitchin (3 miles north).
Near you in Langley End
Locally, jobs take us to businesses close to The Rusty Gun pub and the streets around them. The nearest railway station is Stevenage station, roughly 2.2 miles east. A little further out are Stevenage Museum (2.6 miles east) and Lister Hospital (2.6 miles north-east). Open spaces near Langley End include Purwell Ninesprings.
Langley End: your questions answered
Do you do school ventilation cleaning in Langley End in the summer holidays?
Yes. The holidays are the usual time for school work. The FSA’s register shows about 2 schools and colleges with food registrations within roughly a mile and a half of Langley End. Send us your term dates when you ring 0345 646 2711 or drop us a line, and we will fit the work in.
Can you work in Langley End outside opening hours?
Yes, nights and weekends are routine for us. The site is handed back ready to open. Let us know the hours you are closed and we’ll book within them.
Does the AHU have to be shut down for cleaning?
Yes, while the clean is under way. We can work evenings, overnight or at weekends to keep disruption down.
What do you clean inside the unit?
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.
How much does AHU cleaning cost?
It depends on the site, so we quote each one individually. To get one, give us a ring on 0345 646 2711 or drop us a line with the site type, opening hours and a few photos.
Do you offer maintenance contracts?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. The report from each visit recommends the next date.
What do you need from me for a quote?
The site address, the type of premises and your opening hours, along with a few pictures and any previous report.
When should our AHU next be cleaned?
Inspection under TR19® Air decides it. A hard-working unit, or one serving a hospital or care home, may need cleaning more often.