Hertfordshire · Air handling unit cleaning
Great Hormead AHU cleaning
AHU cleaning for commercial sites in Great Hormead and across Hertfordshire. CHAS, SafeContractor and ISO 9001, and fully insured.
- Stale or musty smells from the ventilation
- Intake sections clogged with outdoor debris
- Plant that has been serviced but not cleaned
How we handle AHU cleaning in Great Hormead
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. Common call-outs are for debris and leaves in the fresh air intake and filters that are clogged or overdue, on supply and extract fans, internal panels and heating and cooling coils.
In a village or hamlet like Great Hormead, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
The paperwork matters as much as the work. You get a written report with pictures after each visit, listing what was done, anything we couldn’t reach and when the next visit is due. File it in your maintenance log so it’s to hand when an insurer or inspector asks.
- Where
- Great Hormead (SG9)
- Region
- Hertfordshire
- Reporting
- Photo report after every visit
- Price
- A fixed price before any work starts
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What AHU cleaning looks like in Great Hormead
Great Hormead is about 32 miles from central London, well within the area we cover across London and the South East. The visit is fixed around your opening hours, not ours.
If you manage a school such as Hormead Church of England (VA) First School, ventilation cleaning is best booked for the holidays.
Great Hormead is in Hertfordshire. Across the SG9 area, we cover AHU cleaning for commercial sites. Great Hormead is one of 381 towns, villages and districts in Hertfordshire where we work for AHU cleaning. Our Chelmsford page covers sites nearby (24 miles or so).
We work across the SG9 postcode area for AHU cleaning and the streets around it. We cover sites on Anderson's Lane, Halfacre Lane and Horseshoe Lane and the roads around them. Neighbouring places we cover for AHU cleaning include Daw's End (1 mile north), Anstey (2 miles north), Wyddial (2 miles north-west), Layston (2 miles west) and Brent Pelham (2 miles east). We also work in nearby towns such as Stevenage (10 miles west), Bishop's Stortford (8 miles south-east), Welwyn Garden City (14 miles south-west), Hitchin (13 miles west), Hoddesdon (14 miles south) and Hertford (12 miles south-west).
Landmarks near Great Hormead
Around Great Hormead, our work takes us to kitchens and buildings near The Beehive pub, among other places. Other landmarks nearby include Brent Pelham (1.7 miles north-east).
Different parts, different methods
Filters
Filter condition tells you a lot about the rest of the unit. They’re photographed before and after for your records.
Fans and fan sections
The fan section is cleaned with the unit switched off and isolated in agreement with the site.
Landlords, agents and facilities managers
Whether it’s one building or many, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with photos.
We regularly work with managing agents. Tell us the site, the work and the access arrangements and we’ll come back with a fixed quote.
Between visits
Looking after the system between visits is straightforward, and it makes the next visit easier:
- Report stiff or damaged access doors
- Plan the next inspection before the last report gets filed away
- Keep the area around the fresh air intake clear
- Stick to the filter change plan
Photos in the report cover the filters, coils, drain tray, fan and casing, and note any part we couldn’t get to. It also notes faults we spotted, such as damaged panels or a blocked drain.
Have the unit inspected regularly, in line with the risk-based approach of TR19® Air, rather than waiting for a problem.
Do you need AHU cleaning in Great Hormead?
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.
Keep an eye out for any of the following:
- Units needing a clean before a new tenant or handover
- Dust-coated heating and cooling coils
- Odours coming through the supply air
- Filters that are clogged or overdue
Around Great Hormead, as anywhere, ventilation cleaning begins with an inspection.
What to look for in a quote
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- What records you’ll receive afterwards
- What insurance they carry
- What’s included in the scope, part by part
When it’s something else
Some problems need a different service or another trade:
- Airflow problems caused by the system’s design
- Problems with the unit’s controls or sensors
- Ductwork downstream of the unit, which is a separate clean
If in doubt, give us a ring on 0345 646 2711, or send details by email and we will say what we think before booking.
Where we work
- Drain trays
- Heating and cooling coils
- Filter sections
- Dampers and louvres
- Internal panels
- Supply and extract fans
Places near Great Hormead
Also in Great Hormead
What we do, step by step
The first job on site is protection: floors, worktops and anything near the work are covered. After that, the system is made safe and the work begins. It takes one overnight shift for many single units, with bigger plant phased, and we clear up before we go. If you can send pictures, we can arrive in Great Hormead knowing what to expect.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Let us know when the site is closed or quiet
- Move anything stored near the system
- Tell us about site rules, permits or sign-in
Get a fixed quote
Want a quote for AHU cleaning? Please call 0345 646 2711 or email us and tell us about the site. We’ll explain what we’d do and send a fixed quote before anything is booked.
Related advice
Questions from Great Hormead
Can you work in Great Hormead outside opening hours?
Yes, nights and weekends are routine for us. The work in Great Hormead can fit around your hours. Tell us your opening hours when you ask for a quote.
Do you cover smaller places like Great Hormead?
Yes, Great Hormead is part of our area, however small the site. Photos of the system and directions to the site help us plan the visit.
Do you repair air handling units?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We clean the unit and report anything we see that needs attention.
How long will the unit be out of action?
The work takes from a few hours for a compact unit to a day or more for a large one. Large plant can be split over several shifts, so call us on 0345 646 2711 or send us an email to talk it through.
Will the ventilation be off while you clean?
Yes. The unit has to be shut down and isolated before it’s opened. The shutdown is planned with whoever runs the building.
How often should an air handling unit 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.
How much does AHU cleaning cost?
We do not publish prices, because the cost depends on the job: the size of the system, its condition, access and when we can work. You get a fixed price before work begins.
Can you set up regular visits?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, to suit the system and how it’s used.
What affects the quote in Great Hormead
A fixed price needs a few facts first. We look at:
- Whether several sites go on one quote
- How big the system is
- Working hours and out-of-hours timing
- The condition we find in the survey
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 will explain each part.
What we need to know
When you contact us, it’s useful to have:
- Your last certificate, test record or report
- Problems your staff have spotted
- How we’d reach plant on a roof or in a plant room
- Wide pictures of the system and the area around it
Some systems can be priced from pictures; others need a survey. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, you get a fixed price before any work starts.