Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Colney Heath, Hertfordshire
Looking for AHU cleaning in Colney Heath? We diagnose first, fix the price and book the work around your hours, then sign off with a report and pictures.
- Air handling units due a clean after building work
- Debris and leaves in the fresh air intake
- Dirty fans and fan housings
AHU cleaning in Colney Heath
We clean the parts of the unit where dirt and moisture gather: the filter section, heating and cooling coils, drain trays, fan and casing. Every clean comes with a TR19® certificate and before and after pictures in a report. If you’re dealing with units needing a clean before a new tenant or handover and blocked condensate drains and slimy trays, we can help.
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, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we are fully insured.
- Location
- Colney Heath (AL4)
- Region
- Hertfordshire
- Paperwork
- Written report with pictures
- Price
- Fixed quote, usually within a working day
- Hours
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
What we’re called out for in Colney Heath
No filter stops everything. The fine dust that passes the filters lands on the coils, the fan and the internal panels, a little more each month.
What we are most often called out for:
- Dirty coils holding back the airflow
- Rooms that smell stuffy when the system runs
- Dirty fans and fan housings
- Plant that needs cleaning after a refit
Hill End Hospital, about 2.3 miles west, is the nearest hospital to Colney Heath, and healthcare sites of every size need their supply air kept clean.
What your quote should include
- Whether inaccessible sections are listed on the report
- When the next visit should be, and why
- Whether a survey comes first
- What insurance they carry
The process
Your staff don’t 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. Before we leave, the area is tidied and the paperwork follows. Rural roads and tight entrances are worth telling us about before a visit to Colney Heath.
- We start with a survey of the unit and a fixed quote for the work.
- 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.
Preparing for the visit
- Mention any locked doors, roof access or ceiling voids
- Tell us where we can park and unload
- Plan for cooking equipment or plant to be off before we arrive
Getting a quote
Every quote begins with a look at the system, either from pictures and details you send or from a site visit. Then we send a fixed price so you know the cost before we start.
Related advice
In-house cleaning or a specialist?
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. The inside of ducts and units needs a specialist.
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, and that is where we come in.
Your questions about AHU cleaning in Colney Heath
Can you work in Colney Heath outside opening hours?
Yes, evening, overnight and weekend work is normal for us. The work in Colney Heath can fit around your hours. Let us know the hours you are closed and we’ll book within them.
Will you come out to Colney Heath?
Yes, we work in villages as well as towns, and Colney Heath is covered. Let us know about access, parking and anything unusual about getting there when you book.
Does the AHU have to be shut down for cleaning?
Yes. We can’t clean a running unit, so it’s switched off and made safe first. We agree the timing with your site team.
How do you protect the area?
By covering it before any work starts. We keep the work contained and clean down when we finish.
What types of premises do you cover?
All kinds of commercial and public premises: kitchens, offices, schools, healthcare, retail, leisure and food production. Work is timed around how each site runs.
How much notice do you need?
It depends on the time you need and how big the job is. Mention your preferred dates with your enquiry, and for anything urgent, ring our 24/7 emergency line.
Do you do ventilation duct cleaning too?
Yes. We reach the ducts through access panels, with anything inaccessible recorded, with new panels fitted where needed.
Do you work with multi-site operators?
Yes. Send the list of sites and the work at each and you’ll get one fixed quote.
Colney Heath buildings and their air
There are about 5 schools, colleges and universities and about 8 caring premises (care homes, nurseries and hospitals) on the FSA’s food hygiene register in and around Colney Heath, 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. Colney Heath, about 18 miles from central London, is within our usual area. The visit is fixed around your opening hours, not ours. For Colney Heath, the closest hospital is Hill End Hospital, roughly 2.3 miles west. Clean air matters most where people are unwell, and that is as true in a care home as in a hospital.
School buildings such as Colney Heath Junior Mixed Infant and Nursery School are typically done in the holidays, so classrooms are not disturbed.
Colney Heath is about 2 miles south-west of Hatfield, in Hertfordshire. Whether your site is in the middle of Colney Heath or further out, AHU cleaning is available to all kinds of commercial premises, from small sites to large estates. Colney Heath is one of 381 towns, villages and districts in Hertfordshire we cover for commercial clients. For sites nearby, see our London page, about 18 miles away.
Postcode districts we cover here for AHU cleaning: AL4. AHU cleaning is available to premises on High Street, Fair View and Roestock Lane and nearby roads. If your site is just outside Colney Heath, we cover Sleapshyde (1 mile north-west), Welham Green (1 mile east), Smallford (1 mile north-west), Hatfield (2 miles north-east) and Tyttenhanger (2 miles west). Larger places within reach include Watford (8 miles south-west), Hemel Hempstead (9 miles west), Stevenage (12 miles north), St Albans (3 miles west), Welwyn Garden City (5 miles north-east) and Harpenden (7 miles north-west).
What’s near Colney Heath
Typical jobs here are in premises near Chalkdrawers Arms, Bishop's Hatfield Girls' School and North Mimms Park. For rail, the closest station is Welham Green station, roughly 1.7 miles east. Nearby you’ll also find Hill End Hospital (2.3 miles west) and The Bunker at Hatfield Police Station (1.9 miles north). For a walk, there’s Verulamium Lake and Colney Heath Local Nature Reserve.
What happens if it’s left?
Standing water in a drain tray does not clear itself. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Dealing with it early keeps the clean straightforward. Rural sites can’t always move to another kitchen or room when something fails.
The cost depends on how big the system is, what state it’s in and how easy it is to reach. You get a fixed price before we start, so there are no surprises.
Why Colney Heath businesses choose us
- In business since 2009
- A written report with photos after every visit
- One number for every site across the South East and London
- Fixed quotes from a survey or pictures
Keeping the system healthy
How long the results last depends on use and care. We suggest:
- Do not ignore odours coming through the grilles
- Report stiff or damaged access doors
- Make sure condensate is draining away
- Plan the next inspection before the last report gets filed away
The report suggests a date for the next inspection or clean, based on what we found. Under TR19® Air the timing is set by inspection and risk, not a fixed calendar.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
Fixed quotes for AHU cleaning in Colney Heath
A fixed price needs a few facts first. We check:
- Whether we need access equipment or extra panels
- Any permits to work or inductions
- The condition of the system
- Working hours and out-of-hours timing
We do not list prices on the website, because the cost depends on the site in front of us. For a fixed quote, call 0345 646 2711, or send details by email, and we’ll explain what it covers.
Helping us quote
The more you tell us, the more accurate the quote. When you get in touch, it helps to send:
- The site address and the type of premises
- Problems your staff have spotted
- How we’d reach plant on a roof or in a plant room
- Photos showing the whole system and its surroundings
To help 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, call us on 0345 646 2711 or drop us a line.
Places near Colney Heath
Also in Colney Heath
Managing agents and facilities teams in Colney Heath
Managing agents often deal with us directly. Send the address, what’s needed and how access works, and we will send a fixed quote.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we can quote for the whole system.