Hertfordshire · Air handling unit cleaning
AHU Cleaning in Clothall
For AHU cleaning in Clothall, one call is all it takes: survey, fixed quote, work and sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Coils clogged with dust and debris
- Rooms that smell stuffy when the system runs
- Leaves and litter drawn into the unit
AHU cleaning for kitchens and businesses in Clothall
An air handling unit is the heart of a building’s ventilation: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Whatever builds up inside it travels with that air, which is why we clean the unit itself, not just the ducts. We’re often asked to deal with drain trays holding standing water and air handling units due a clean after building work, across filter sections, internal panels and supply and extract fans.
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.
For insurers and inspectors, the record counts. So every job comes with a written report and pictures, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Place
- Clothall (SG7)
- Region
- Hertfordshire
- Reporting
- Report and photos after the visit
- Quotes
- Fixed quote, normally within a working day
- Hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Updated
- 30 October 2026
For landlords and multi-site operators
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. Where responsibility is shared, records matter even more.
Whether it’s one building or many, the standard is the same: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
Clothall questions
Do you work overnight in Clothall?
Yes, out-of-hours work is a big part of what we do. That way a site in Clothall doesn’t have to lose a day’s trading. Let us know the hours you are closed and we’ll book within them.
Can ventilation in schools around Clothall be cleaned out of term?
Yes. Half-terms and the summer break are the natural time for school work. With about 2 schools and colleges on the FSA’s register within roughly a mile and a half of Clothall, it pays to plan holiday dates ahead. Send us your term dates when you call us on 0345 646 2711, or email photos, and we’ll fit the work in.
When should our AHU next be cleaned?
That is set by inspection, in line with TR19® Air. Units in heavy use or in sensitive buildings may need attention more often.
Do you have a 24/7 line?
Yes, any time. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we’ll advise on what to do next.
How much notice do you need?
For planned work, earlier is better, particularly if your next visit is nearly due. Emergencies are different, because our line is open 24/7.
What accreditations do you have?
We hold CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
Is there a survey before the work?
Yes. We always survey first, either from pictures and details you send or on a site visit. A fixed quote follows.
Can you quote from pictures?
In many cases, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Where we cannot see enough, we arrange a survey.
Nearby places to Clothall
More services for Clothall
When to call us in Clothall
Filters that are not changed or cleaned on time clog up, cutting airflow and sometimes letting dirty air bypass them altogether. After that, the coils and fan collect what the filter should have caught.
Signs it’s time to call us include:
- Dust built up on fan impellers
- Dust-coated heating and cooling coils
- Air handling units due a clean after building work
- Drain trays holding standing water
Classrooms and halls at schools such as Weston Primary School are easiest to work in when pupils are away.
Questions to ask before booking
- Whether the whole system is included, or only the parts that are easy to reach
- How VAT is shown on the quote
- What hours they’ll be on site
- Whether a written report and pictures are included
Leave it or put it right?
A light clean now is simpler than a heavy one later. Leave it for years and dirt bakes onto coils and casings, particularly where damp has made it stick. Somewhere as small as Clothall, losing a kitchen or building to a fault is felt by everyone who uses it.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, and a neglected system can mean more work. If you’re unsure, call us on 0345 646 2711, or email photos and we’ll give you an honest view and a fixed quote.
What you get with us
- Every job surveyed first
- In business since 2009
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Accredited under CHAS and SafeContractor, with ISO 9001
Take a look at what affects the cost and our accreditations and certificates.
When it’s something else
We’d rather tell you now than book work that won’t help, so here are the limits:
- Dirty ducts beyond the unit itself
- Problems with the unit’s controls or sensors
- Breakdowns that need a mechanical engineer
If you’re not sure, just phone us on 0345 646 2711 or drop us a line and we will give you a straight answer.
What the work covers
- Supply and extract fans
- Drain trays
- Dampers and louvres
- Heating and cooling coils
- Internal panels
- Filter sections
AHU cleaning around Clothall
The FSA’s food hygiene register lists about 6 caring premises (care homes, nurseries and hospitals) with registered kitchens or food service within 1.5 miles or so of the middle of Clothall. Busy, occupied buildings like these are where clean supply air matters most. Lister Hospital is the nearest hospital, about 4.1 miles south-west of Clothall. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. Clothall, about 33 miles from central London, is within our usual area. We work evenings, overnight and at weekends, so the visit fits around the site.
Healthcare ventilation, from large hospitals like Lister Hospital (about 4.1 miles south-west) to small clinics, depends on clean filters, coils and ducts.
Clothall is about 3 miles east of Letchworth, in Hertfordshire. We carry out AHU cleaning for businesses, landlords and public buildings in Clothall and the rest of Hertfordshire. 381 places in Hertfordshire are on our list, from busy centres to quieter spots. Milton Keynes is in our area too, about 27 miles from Clothall.
All of SG7 is within our area for AHU cleaning, from the main roads to the quietest streets. We also cover Weston (1 mile south-west), Wallington (2 miles north-east), Baldock (2 miles north-west), St Nicholas (3 miles south) and Rooks Nest (4 miles south-west). Within a short drive, we also cover Stevenage (4 miles south), Bishop's Stortford (15 miles south-east), Welwyn Garden City (12 miles south), Harpenden (14 miles south-west), Hitchin (5 miles west) and Hatfield (15 miles south).
Around Clothall
In Clothall, that means kitchens and buildings near The Knights Templar School and the streets around them. The nearest railway station is Baldock station, about 2.2 miles north-west of the centre. A little further out are First Garden City Heritage Museum (3.1 miles west) and Clothall Castle (within half a mile south-east). Green spaces nearby include Pryor's Wood.
The process
When we arrive, we check the system against the survey or the photos you sent. Anything unexpected is raised with you before we go further. After that, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. Somewhere like Clothall, lanes, gates and parking are worth mentioning in advance.
- We agree a shutdown window that suits the building.
- We take before pictures of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- We take after photos and issue the certificate and report.
How to prepare
- Name a contact who can let us in at the agreed time
- Move anything stored near the system
- Tell us where we can park and unload
Ask for a quote
Getting a quote doesn’t take long. Send a few details and pictures, and we typically reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.
Related advice
How we price AHU cleaning
We quote each job individually. These are the things that affect it:
- Parking and loading at the site
- One-off work versus a regular cycle
- When the work can happen, such as evenings, overnight or weekends
- How big the system is
When the work has to happen, how we reach it and how big the site is can all change the price. Each of those is built into the quote, and the price is fixed before we start.
What we need to know
What to send for a quote:
- Where the site is and what kind of site it is
- The times we could work without disrupting the site
- Any access panels or hatches you can see
- Wide pictures of the system and the area around it
Need a price for AHU cleaning? Please call us on 0345 646 2711 or send us an email and tell us about the site. We’ll talk you through the work and give you a fixed quote before you commit to anything.
What your team can do, and what needs us
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but they do not reach the grease that builds up further in. That part needs specialist access and equipment.
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but the parts you cannot see still need a specialist at the right interval.