Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Shephall, Hertfordshire
Our technicians work in Shephall on cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Out-of-hours visits, a fixed quote and a written report with photos on every job.
- Blocked condensate drains and slimy trays
- Odours coming through the supply air
- Dust-coated heating and cooling coils
How we handle AHU cleaning in Shephall
Coils are where a lot of the dirt ends up. Dirt on the fins holds back air and makes the unit work harder to do the same job. We clean coils with methods suited to their condition, taking care not to damage the fins. Common call-outs are for air handling units due a clean after building work and dirty coils holding back the airflow, across dampers and louvres, filter sections and supply and extract fans.
For a building near Shephall, the visit is planned around how it’s used, and the journey is planned ahead. The work is the same as in any town: inspect, clean, record.
Insurers, fire officers and environmental health officers all look at records. That’s why every job is written up in a report with photos, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Location
- Shephall (SG2, SG1)
- Wider area
- Hertfordshire
- Records
- Written report with pictures
- Price
- A fixed quote up front
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
What the work involves, part by part
Internal casing and panels
Dust settles on every internal surface of the unit. Each section is cleaned from the intake through to the outlet.
Fans and fan sections
The fan moves all of the unit’s air, so dirt on it gets spread around. We clean the impeller, housing and surrounding section.
What a clean won’t put right
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It does not solve:
- Controls and BMS settings that run the unit
- Faulty motors, drives or bearings
- Leaking heating or cooling coils
Not sure which it is? You can call 0345 646 2711 or drop us a line and we’ll tell you honestly.
Parts of the system we cover
- Drain trays
- Heating and cooling coils
- Supply and extract fans
- Filter sections
- Internal panels
- Dampers and louvres
Aftercare tips
Once we’ve finished, these simple steps help:
- Check the drain tray is emptying during routine visits
- Do not ignore odours coming through the grilles
- Book the next check in line with the report
- Note any water around the unit or leaks below it
The report shows each section of the unit before and after, 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.
Why act early in Shephall
Tenants, auditors and owners may want proof that the air handling plant is kept clean. Our certificate and photo report give you clear evidence, ready to show anyone who asks. You choose the date of a planned visit, and a breakdown never asks.
Combining work into one visit or one programme can make for a more efficient booking. Mention every system or site you need covered, and you’ll get one fixed quote.
Why us?
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A written report with photos after each visit
- A single point of contact for sites across the South East and London
- Out-of-hours work and a 24/7 emergency line
Take a look at what affects the cost or our accreditations and certificates.
Managing agents and facilities teams in Shephall
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
Records are where multi-site compliance often slips. Each visit produces a dated report with photos, ready to show insurers, fire officers or EHOs.
What happens on the day
Protection comes first: floors, worktops and anything near the work are covered. Then we make the system safe and start. The work on site takes anything from half a day for one small unit to several shifts for a plant room full of them, and we clear up before we go. Around Shephall, access is normally simpler than in a town centre, though gates and roof access are worth mentioning.
- The survey covers the unit, its access and how it can be shut down.
- 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.
- We close every panel, hand the unit back and send the report and certificate.
Before we arrive
- Let us know about parking and loading
- Tell us about site rules, permits or sign-in
- Allow time for equipment near the work to be turned off and cool down
Get a fixed quote
Want a quote for AHU cleaning? Please give us a ring on 0345 646 2711, or email photos with a few details about the site. We will explain what we’d do and send a fixed quote before you commit to anything.
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AHU cleaning in Shephall: local notes
Going by the FSA’s register, there are about 28 schools, colleges and universities, about 15 care, childcare and hospital premises and about 4 hotels and guest houses serving food across Shephall and its immediate surroundings (about a mile and a half). Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Shephall, about 27 miles from central London, is within our usual area. Evening, overnight and weekend visits are all possible. Lister Hospital is the nearest hospital, about 2.7 miles north-west of Shephall. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
Classrooms and halls at schools such as Peartree Spring Primary School are easiest to work in when pupils are away. Healthcare buildings such as Lister Hospital, about 2.7 miles north-west, depend on their ventilation; if you manage a surgery, clinic or care home near Shephall, yours matters too.
Shephall is about 1 mile south of Stevenage, in Hertfordshire. Whatever kind of site you run in Shephall, AHU cleaning is something we can help with. Visits can be booked for evenings, overnight or weekends so the site keeps running. Our Hertfordshire coverage runs to 381 places, and Shephall is one of them. We also work in London, around 27 miles away.
Our technicians cover all of the SG2 and SG1 postcode area for AHU cleaning and the roads nearby. Local streets include Unwin Road, Oxleys Road and Burwell Road, and we cover them all for AHU cleaning. Other places close to Shephall include Aston (1 mile east), Bragbury End (1 mile south-east), Knebworth (2 miles south), Hook's Cross (2 miles south-east) and Woolmer Green (3 miles south). We also work in nearby towns such as Hemel Hempstead (15 miles south-west), St Albans (12 miles south-west), Bishop's Stortford (14 miles east), Welwyn Garden City (6 miles south), Harpenden (9 miles south-west) and Hitchin (6 miles north-west).
Landmarks near Shephall
Around Shephall, our work takes us to kitchens and buildings near Coopers Inn, The Heathcote School and Barnwell School, among other places. For rail, the closest station is Stevenage station, about 1.4 miles north-west. Nearby you will also find Benington Castle (2.6 miles east) and Lister Hospital (2.7 miles north-west). Green spaces nearby include Ridlins Mire.
What your team can do, and what needs us
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. Leave those to us.
If your staff spot something between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We can diagnose it and quote.
Shephall questions
Can you get to a site in Shephall?
Yes. Villages and rural sites across the South East are part of our work, Shephall included. Photos of the system and directions to the site help us plan the visit.
Can a school’s ventilation in Shephall be done out of term time?
Yes. The holidays are the usual time for school work. Around Shephall, the Food Standards Agency lists about 28 schools and colleges with registered kitchens within a mile and a half or so. Booking early in the term gives the best choice of holiday dates.
Can you look after several sites?
Yes. Our area covers London and the South East, so we can schedule a run of sites as one programme. Each site gets its own report and photos.
What’s TR19?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It is not legislation, but it’s the standard people check against.
Where does the waste go?
We contain it and take it with us. Grease, debris and waste water are collected as the work goes on rather than letting it spread.
Do you repair air handling units?
Our AHU work is cleaning rather than mechanical repair. If we spot a fault, we note it in the report so your maintenance contractor can deal with it.
What do you clean inside the unit?
All the internal parts the air touches, from intake to discharge, including coils, fan and drain trays. The photo report shows each section before and after.
How often should an air handling unit be cleaned?
Inspection under TR19® Air decides it. Units in heavy use or in sensitive buildings may need attention more often.