Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Rush Green, Hertfordshire
We cover Rush Green for 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 as standard.
- Condensate trays that won’t empty
- Debris and leaves in the fresh air intake
- Dirty fans and fan housings
When to call us in Rush Green
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.
Keep an eye out for these warning signs:
- Air handling units due a clean after building work
- Odours coming through the supply air
- Dirty coils holding back the airflow
- Filters that are clogged or overdue
Healthcare ventilation, from large hospitals like Lister Hospital (about 2.2 miles north-east) to small clinics, depends on clean filters, coils and ducts.
Questions to ask before booking
- When they can work, and whether that’s outside your opening hours
- If the quote is a fixed price or an estimate
- Whether the quote shows VAT
- Which accreditations they hold, and whether you can check them
AHU cleaning in Rush Green
Coils are where a lot of the dirt ends up. A coated coil restricts airflow and makes the unit work harder. Coils are cleaned carefully, with methods chosen so the fins are not flattened. The work covers dampers and louvres, supply and extract fans and filter sections, and the jobs we see most are stale or musty smells from the ventilation and plant that needs cleaning after a refit.
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.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we’re fully insured. On top of that, we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we have been trading since 2009.
- Where
- Rush Green (SG4)
- Wider area
- Hertfordshire
- Records
- Photo report after every visit
- Quotes
- A fixed quote up front
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Part by part
Rooftop and plant room units
Units on roofs and in plant rooms can be awkward to reach. We plan safe access as part of the survey so the quote reflects it.
Internal casing and panels
Damaged internal linings or loose panels can shed material into the air. We note any we find in the report.
Places near Rush Green
Other services in Rush Green
What affects the cost of AHU cleaning
We do not publish a price list, because no two systems are the same. What we look at:
- How big the system is
- A single visit or a regular plan
- Where the site is and how we reach it
- Site rules, permits and inductions
Working hours, access and the scale of the site all affect the cost. We take each of them into account, and the price is fixed before work begins.
What we need to know
What to send for a quote:
- The site address and the type of premises
- Any previous report or certificate
- How we’d reach plant on a roof or in a plant room
- The times we could work without disrupting the site
Getting a quote doesn’t take long. Call or email with a few details and you will usually have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
AHU cleaning in Rush Green: local notes
The nearest hospital to Rush Green is Lister Hospital, about 2.2 miles north-east. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. Rush Green, about 28 miles from central London, is within our usual area. Visits are booked around your hours, evenings and weekends included.
For schools like The Thomas Alleyne School, the holidays are the usual time to inspect and clean ventilation.
Rush Green is about 3 miles west of Stevenage, in Hertfordshire. For AHU cleaning in and around Rush Green, please ring 0345 646 2711 or use the quote form for a fixed quote. Our area covers London and the South East, Rush Green included. Our Hertfordshire coverage runs to 381 places, Rush Green among them. You can also see our page for Milton Keynes, roughly 24 miles from Rush Green.
AHU cleaning in SG4 follows the same survey, fixed quote and written report as everywhere else we cover. We also cover the places around Rush Green: Langley Bottom (1 mile south), Langley (1 mile south-east), St Paul's Walden (1 mile south-west), Old Knebworth (2 miles south-east) and Whitwell (2 miles south-west). We also work in nearby towns such as Hemel Hempstead (14 miles south-west), Stevenage (3 miles east), St Albans (11 miles south), Welwyn Garden City (7 miles south), Harpenden (7 miles south-west) and Hitchin (4 miles north).
Around Rush Green
Typical jobs here are in premises near Concerts at Knebworth House and Farmers Boy Public House, among other places. The nearest railway station is Stevenage station, about 1.6 miles east of the centre. Nearby you will also find Lister Hospital (2.2 miles north-east) and Wymondley Castle (3 miles north). For a walk, there’s Ridlins Mire.
For landlords and multi-site operators
From a single site to a large estate, the standard is the same: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
Keeping records across a portfolio is half the battle. Each visit ends with a dated report and pictures, ready to show insurers, fire officers or EHOs.
FAQs for Rush Green
Can you come to Rush Green after we close?
Yes, evening, overnight and weekend work is normal for us. The work in Rush Green can fit around your hours. Tell us your opening hours when you ask for a quote.
Can you get to a site in Rush Green?
Yes, we work in villages as well as towns, and Rush Green is covered. Just mention lanes, gates or anything else about the site when you book.
Where does the waste go?
We contain it and take it with us. We collect grease, debris and waste water as we go rather than letting it spread.
Can you fix a faulty AHU?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We’ll flag anything we notice during the clean.
Can one contract cover all our sites?
Yes. We work across South East England and London, so sites at different addresses can be planned together on one programme. Each site gets its own report and photos.
What’s 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 offer emergency callouts?
Yes, 24/7. Our office is open from 8am to 6pm on weekdays, with the emergency line covering every other hour.
Can you price the work without visiting?
Yes, where the photos show enough. If not, a site survey comes first, then a fixed quote.
What staff can safely do
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We can diagnose it and quote.
Your own staff can handle the daily basics: 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, and that’s where we come in.
Between visits
Here’s the after-treatment advice, in brief:
- Keep inspection doors on the unit in good order
- Report musty smells from the vents straight away
- Stick to the filter change plan
- File each AHU report in the maintenance log
If the ductwork hasn’t been cleaned, consider it next. A clean unit feeding dirty ducts only solves half the problem, and we can survey both.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.
What we do, step by step
Protection comes first: floors, worktops and anything near the work are covered. Then we make the system safe and start. It takes from a few hours for a compact unit to a day or more for a large one, and we clear up before we go. A few photos of the system help us make the most of a visit to a place like Rush Green.
- We start with a survey of the unit and a fixed quote for the work.
- We arrange the shutdown with your staff and sheet the area.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- Drain trays are cleared and cleaned and the outlet checked.
- A TR19® certificate and photo report follow the clean.
Getting ready for the visit
- Let us know when the site is closed or quiet
- Mention any sign-in, permit or induction we need
- Mention any locked doors, roof access or ceiling voids
Get a fixed quote
To get a fixed quote, phone us on 0345 646 2711 or email us and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. You will typically have a quote within one working day.