Hertfordshire · Air handling unit cleaning
AHU Cleaning in Letchworth Garden City
Looking for AHU cleaning in Letchworth Garden City? We survey first, send you a fixed quote and work around your opening hours, then sign off with a report and pictures.
- Intake sections clogged with outdoor debris
- Dirty coils holding back the airflow
- Filters that are clogged or overdue
The process
Your staff do not need to do much on the day. Someone lets us in at the agreed time and shows us where everything is, and the rest is down to us. Afterwards, the area is left tidy and the written report follows. For a site in a town like Letchworth Garden City, tell us your opening hours, where we can park and how we reach the roof or plant.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- The unit is closed up and handed back, with a report to follow.
Getting ready for the visit
- Let us know about permits to work or site inductions
- Arrange a key holder or contact on site
- Tell us where we can park and unload
Ask for a quote
Every quote begins with a look at the system, from your pictures and details or, where that isn’t enough, a survey on site. After that, you get a fixed price for the work, before any work starts.
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AHU cleaning for kitchens and businesses in Letchworth Garden City
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, right in the path of the air going into the building. Cleaning and clearing it is a key part of the job. The work covers filter sections, heating and cooling coils and dampers and louvres, and people most often call us about plant that needs cleaning after a refit and drain trays holding standing water.
Buildings in towns like Letchworth Garden City often have ventilation added in stages, with units on the roof or in a plant room. The work starts with an inspection to decide what needs cleaning, so you are not paying for more than the system needs.
Nothing is signed off by word of mouth: a written report, dated and illustrated with photos, 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.
- Place
- Letchworth Garden City (SG6, SG7)
- Region
- Hertfordshire
- Reporting
- Photo report after every visit
- Quote
- A fixed quote up front
- Working hours
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
When it’s something else
We’d rather tell you now than book work that will not help, so these are the things it won’t cover:
- Controls and BMS settings that run the unit
- Damaged coils beyond cleaning
- Mechanical faults with motors, belts or bearings
If in doubt, ring 0345 646 2711 or send us an email and we’ll say what we think.
What we work on in Letchworth Garden City
- Supply and extract fans
- Filter sections
- Drain trays
- Heating and cooling coils
- Internal panels
- Dampers and louvres
For landlords and multi-site operators
Keeping records across a portfolio is half the battle. Every visit ends with a dated report and photos, so you can show an insurer or inspector what was done at each site.
Running several sites is easier with one contractor. We work across London and the South East, so visits at different addresses can be planned together and kept to a regular schedule.
Also near Letchworth Garden City
More services for Letchworth Garden City
Why act early in Letchworth Garden City
Standing water in a drain tray doesn’t clear itself. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Clearing it now is a much smaller job. Catching it early in Letchworth Garden City means you choose the day.
Several systems or sites on one quote often makes better use of the time. Tell us about everything you’d like looked at and we’ll price it together.
What you get with us
- Fixed quotes, usually within one working day
- CHAS and SafeContractor accredited, with ISO 9001
- Each visit written up, with photos
- We diagnose before we treat
Read how cleaning jobs are priced and our accreditations and certificates.
Looking after it afterwards
No system stays clean for ever, but care slows the build-up. Our tips:
- Make sure the unit’s access doors open easily
- Make sure condensate is draining away
- Stick to the filter change plan
- Do not store bins or materials near the intake
Restart the unit with your site team or maintenance contractor once we have finished. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Regular filter changes are the best protection an AHU has. Once filters clog, dirt starts getting past them.
How the job changes from site to site
Internal casing and panels
Loose or damaged linings inside a unit can break up into the airstream. We note any we find in the report.
Fans and fan sections
Before the fan is touched, the unit is shut down and made safe in agreement with the site.
Common questions in Letchworth Garden City
Do you clean school ventilation in Letchworth Garden City in the holidays?
Yes, out-of-term visits are normal for schools. Food Standards Agency records list about 15 schools, colleges and universities with registered kitchens within about a mile and a half of Letchworth Garden City. Booking early in the term gives the best choice of holiday dates.
Can you come to Letchworth Garden City after we close?
Yes, out-of-hours work is a big part of what we do. The site is handed back ready to open. Tell us your opening hours when you ask for a quote.
Do you offer emergency callouts?
Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, with the emergency line covering every other hour.
What is TR19?
It’s the industry benchmark for cleaning ventilation and kitchen extract systems, written by BESA. It covers how systems are inspected, cleaned and checked, and it takes a risk-based approach.
Do you work with multi-site operators?
Yes. One number covers all your sites in our area, with visits on a regular schedule.
What happens to the waste?
Anything we remove is contained as we work and taken away with us, from grease and debris to used cleaning water. None of it is left on site.
How much does AHU cleaning cost?
The cost depends on the size of the system, its condition, access and timing. Call for a fixed quote, normally ready within one working day.
Which parts of an air handling unit do you clean?
All the internal parts the air touches, from the intake and filters through the coils and fan to the outlet. You get a photo report showing each part before and after.
What your team can do, and what needs us
Day-to-day cleaning is something your team can do: wiping down canopy surfaces, cleaning filters and keeping a simple log. What they cannot safely do is clean inside the ductwork, the fan or the risers, which is where we come in.
Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Letchworth Garden City buildings and their air
Food Standards Agency records list about 15 schools, colleges and universities, about 19 hospitals, care homes and childcare premises and about 3 hotels and guest houses registered as food businesses within roughly a mile and a half of the centre of Letchworth Garden City. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Letchworth Garden City is about 34 miles from central London, well within the area we cover across London and the South East. Visits are booked around your hours, evenings and weekends included. The nearest hospital to Letchworth Garden City is Fairfield Hospital, about 1.8 miles north-west. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
School buildings such as Pixmore Junior School are usually done in the holidays, so classrooms aren’t disturbed. If you manage shops or offices close to Letchworth Garden City station, a TR19® Air inspection shows whether the ductwork needs cleaning. Fairfield Hospital, about 1.8 miles north-west, is the nearest hospital to Letchworth Garden City, and healthcare sites of every size need their supply air kept clean.
Letchworth Garden City is about 5 miles north-west of Stevenage, in Hertfordshire. We carry out AHU cleaning for commercial premises of every kind in Letchworth Garden City and the rest of Hertfordshire. We cover 381 places across Hertfordshire, large and small. For sites nearby, see our Milton Keynes page (23 miles or so).
We work across the SG6 and SG7 postcode area for AHU cleaning and the roads nearby. We cover sites on Pix Road, Field Lane and Ridge Road and the roads around them. Being close to the A505, Letchworth Garden City is simple for us to get to at any hour. Close by, we work in Letchworth (1 mile east), Willian (1 mile south), Norton (1 mile north-east), Walsworth (2 miles south-west) and Ickleford (2 miles west). Larger places within reach include Stevenage (5 miles south-east), Welwyn Garden City (13 miles south), Harpenden (12 miles south-west), Hitchin (3 miles south-west), Hatfield (15 miles south) and Hertford (14 miles south-east).
Local landmarks in Letchworth Garden City
Typical jobs here are in premises near Norton School, Three Magnets pub and Church of St Paul. There’s a railway station in Letchworth Garden City itself: Letchworth Garden City station. Nearby you’ll also find Wymondley Castle (2.5 miles south) and Fairfield Hospital (1.8 miles north-west). Not far away are Purwell Ninesprings.