Hertfordshire · Air handling unit cleaning
High Leigh AHU cleaning
Professional AHU cleaning in and around High Leigh, booked around your opening hours and finished with a written report and photos.
- Blocked condensate drains and slimy trays
- Dirty fans and fan housings
- Dirty coils holding back the airflow
Ventilation in High Leigh buildings
Food Standards Agency records list about 8 schools, colleges and universities and about 15 caring premises (care homes, nurseries and hospitals) registered as food businesses in and around High Leigh, up to about a mile and a half out. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. We cover High Leigh, about 18 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. For High Leigh, the closest hospital is Hertford County Hospital, roughly 3.5 miles north-west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Hospitals such as Hertford County Hospital (about 3.5 miles north-west) show how much a building can rely on clean ventilation, and smaller healthcare sites near High Leigh are no different.
High Leigh is about 1 mile north-west of Hoddesdon, in Hertfordshire. We carry out AHU cleaning for businesses, landlords and public buildings in High Leigh and the rest of Hertfordshire. 381 places in Hertfordshire are on our list, from busy centres to quieter spots. Our London page covers sites nearby (18 miles or so).
All of EN11 is covered for AHU cleaning, from the main roads to the quietest streets. You will find streets such as Lord Street, Sedgwick Grove and Box Lane, all of which we cover for AHU cleaning. Close by, we work in Woollensbrook (1 mile north), Goose Green (1 mile west), Hoddesdon (1 mile south-east), Broxbourne (1 mile south) and Hailey (1 mile north). We also work in nearby towns such as Stevenage (12 miles north-west), St Albans (13 miles west), Bishop's Stortford (11 miles north-east), Welwyn Garden City (8 miles west), Harpenden (14 miles west) and Cheshunt (4 miles south).
Around High Leigh
We work in commercial kitchens and buildings around Barclay Park, King William IV Public House and Robert Barclay Academy and the streets around them. The nearest railway station is Broxbourne station, about 1.3 miles south-east of the centre. A little further out are Lowewood Museum (0.8 miles south-east) and Hertford County Hospital (3.5 miles north-west). The countryside around High Leigh includes Danemead and Cheshunt Lake.
About our AHU cleaning in High Leigh
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. The work covers supply and extract fans, dampers and louvres and heating and cooling coils, and common reasons people get in touch are dust-coated heating and cooling coils and odours coming through the supply air.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
We have been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
- Where
- High Leigh (EN11)
- Wider area
- Hertfordshire
- Records
- Photo report after each visit
- Quotes
- Fixed quote, typically within a working day
- Working hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
Places near High Leigh
More services for High Leigh
Multi-site and managed buildings
We regularly work with managing agents. Send the address, what’s needed and how access works and we’ll come back with a fixed quote.
Whether it’s one building or many, the standard is the same: a survey first, a fixed quote, the work timed around the site and a report with pictures.
Do you need AHU cleaning in High Leigh?
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray does not fall properly, water stands in it, and slime and smells soon follow.
The symptoms we’re asked about most are:
- Filters that are clogged or overdue
- Stale or musty smells from the ventilation
- Dirty fans and fan housings
- Condensate trays that won’t empty
If you manage a school such as Westfield Community Primary School, ventilation cleaning is best booked for the holidays.
Comparing quotes
- What paperwork you get at the end
- When they can work, and whether that’s outside your opening hours
- If the quote is a fixed price or an estimate
- When the next visit should be, and why
How we price AHU cleaning
Before we fix a price, we need to know a few things. We check:
- How big the system is
- How easy every part is to reach
- The condition of the system
- Where the site is and how we reach it
A single site or a whole portfolio, we price it on the same basis: the work involved, the access and the timing. You will have a fixed price before work begins.
Helping us quote
We can often survey from pictures. Try to include:
- The site address and the type of premises
- Photos showing the whole system and its surroundings
- Your last certificate, test record or report
- Any access panels or hatches you can see
Here’s what helps us quote: the address, the type of site and when it’s open, photos of the system and any previous report or certificate. Once you have those, give us a ring on 0345 646 2711 or use the quote form.
Leave it or put it right?
Tenants, auditors and owners may want proof that the air handling plant is kept clean. A TR19® certificate and photo report give you that, ready to show anyone who asks. Our emergency line runs 24/7, but a planned visit to High Leigh is calmer for everyone.
You won’t find a price list here, because each job is priced on what it involves. Call for a fixed quote, and we will talk you through it.
Why book with us
- Photo reports with every job
- Work around your opening hours, with 24/7 emergency cover
- Ventilation hygiene specialists since 2009
- Fixed quotes from a survey or photos
What the work involves, part by part
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. We protect the area below before opening them.
Internal casing and panels
Loose or damaged linings inside a unit can break up into the airstream. Anything like that is recorded with pictures.
Looking after it afterwards
Simple habits between visits make a real difference. Our advice:
- Diary the inspection date recommended in the report
- Report stiff or damaged access doors
- Watch for drips or damp patches near the plant
- Flag stale or damp smells in the supply air
You receive a TR19® certificate and a photo report after the clean. They belong in the plant or maintenance log.
Do not let leaves, litter or stored materials build up near the fresh air intake. Anything around the intake is likely to be drawn in.
FAQs for High Leigh
Can the work in High Leigh be done at night or at weekends?
Yes, evening, overnight and weekend work is normal for us. The site is handed back ready to open. When you ring 0345 646 2711 or drop us a line, mention when the site is quiet.
Can you clean school ventilation in High Leigh during the holidays?
Yes, out-of-term visits are normal for schools. With about 8 schools and colleges on the FSA’s register within roughly a mile and a half of High Leigh, it pays to plan holiday dates ahead. Tell us your holiday dates and we will book the visit for when the site is empty.
How do you keep the site clean during the work?
Floors and surfaces near the work are sheeted before we start, and anything we remove is contained. Before we leave, we tidy up and clean down.
Which accreditations do you hold?
We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
Can you look after several sites?
Yes. Send the list of sites and the work at each and you’ll get one fixed quote.
How much notice do you need?
Earlier is better, particularly for night and weekend visits. Quotes typically come back within one working day, and there’s a 24/7 line for emergencies.
Do you work in High Leigh?
Yes. We work across Greater London, Surrey, Kent, Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, High Leigh included.
Which parts of an air handling unit do you clean?
Everything inside the unit that air passes over, from the intake and filters through the coils and fan to the outlet. You get a photo report showing each part before and after.
The process
When we arrive, we check the system against the survey or the pictures you sent. Anything unexpected is raised with you before we go further. After that, the work takes half a day to a full day per unit, with large plant planned over several shifts. If the van will struggle with a lane or gateway near High Leigh, let us know and we’ll plan around it.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures 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
- Make sure someone can let us in and lock up afterwards
- Let us know about permits to work or site inductions
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Get a fixed quote
Some systems can be priced from pictures; others need a survey. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, you get a fixed price before work begins.