Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Green Street, Hertfordshire
AHU cleaning in Green Street from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Units needing a clean before a new tenant or handover
- Debris and leaves in the fresh air intake
- Stale or musty smells from the ventilation
In-house cleaning or a specialist?
Staff cleaning and specialist work are not the same thing. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but they do not reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We’ll take a look and give you a fixed quote.
AHU cleaning for kitchens and businesses in Green Street
The fan pushes every bit of air in the system, so dust on its blades and housing ends up in the airstream. We clean the fan section along with the rest of the unit, once the unit has been shut down and isolated. The work covers drain trays, supply and extract fans and filter sections, and the jobs we see most are air handling units due a clean after building work and plant that has been serviced but not cleaned.
Work in a small place like Green Street starts with agreeing access and timings.
Insurers, fire officers and environmental health officers all look at records. That is why every job is written up in a report with pictures, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Location
- Green Street (WD6)
- Region
- Hertfordshire
- Paperwork
- Report and photos after the visit
- Quote
- Fixed quote, typically within a working day
- Hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
AHU cleaning around Green Street
There are about 8 schools, colleges and universities, about 15 hospitals, care homes and childcare premises and about 4 hotels and guest houses on the FSA’s food hygiene register within about 1.5 miles of central Green Street. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. At about 14 miles from central London, Green Street sits well inside the area we cover. We work evenings, overnight and at weekends, so the visit fits around the site. About 1.6 miles north-west of Green Street is Shenley Hospital, the nearest hospital. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Wherever a school like Parkside Community Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time.
Green Street is about 1 mile north of Borehamwood, in Hertfordshire. Whether your site is in the middle of Green Street or further out, AHU cleaning is available to all kinds of commercial premises, from small sites to large estates. Our area takes in 381 places across Hertfordshire, from busy centres to quieter spots. You can also see our page for London, about 14 miles away.
Every address in WD6 is within our area for AHU cleaning, from the main roads to the quietest streets. Whether your site is on Stapleton Road, Green Street and Cowley Hill or a nearby road, we can help. Neighbouring places we cover for AHU cleaning include Well End (1 mile south-east), Borehamwood (1 mile south), Shenley (1 mile north-west), Ridge (2 miles north-east) and Rowley Green (2 miles south-east). Within a short drive, we also cover Watford (5 miles west), Hemel Hempstead (10 miles north-west), St Albans (6 miles north-west), Welwyn Garden City (9 miles north), Harpenden (10 miles north) and Hoddesdon (12 miles north-east).
Around Green Street
We work in commercial kitchens and buildings around The White Horse Public House and Hertswood Academy and the streets around them. The nearest railway station is Elstree & Borehamwood station, about 1.6 miles south of the centre. Nearby you will also find Hilfield Castle (3 miles south-west) and Shenley Hospital (1.6 miles north-west). For a walk, there’s Darland's Lake and Arkley Lane and Pastures.
How it works
We work around your opening hours, not the other way round. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. Once we are in, the area is sheeted and anything that has to be off is turned off and cooled, and the work takes anything from half a day for one small unit to several shifts for a plant room full of them. For a village or hamlet like Green Street, tell us about narrow lanes, gates and parking when you book.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- The unit is closed up and handed back, with a report to follow.
Before we arrive
- Let us know when the site is closed or quiet
- Find the previous report, if there is one
- Tell us about site rules, permits or sign-in
Getting a quote
Every quote begins with a look at the system, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work so you know the cost before we start.
Advice
FAQs for Green Street
Can a school’s ventilation in Green Street be done out of term time?
Yes, and it’s the easiest time to do it. The FSA’s register shows about 8 schools and colleges with food registrations within roughly a mile and a half of Green Street. You can phone us on 0345 646 2711 or send us an email with the dates the site is empty.
Do you work at weekends in Green Street?
Yes, nights and weekends are routine for us. That way a site in Green Street doesn’t have to lose a day’s trading. Let us know the hours you’re closed and we will book within them.
How long does an AHU clean take?
The work takes one overnight shift for many single units, with bigger plant phased. Bigger units can be phased, so phone us on 0345 646 2711 or drop us a line to talk it through.
Will we get paperwork for the AHU clean?
Yes. Every clean comes with a TR19® certificate and a photo report. They’re worth keeping with the plant records.
How do you protect the area?
By covering it before any work starts. We keep the work contained and leave the area clean.
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.
Can you quote from photos?
Yes, for many jobs. Send wide shots, close-ups of any access panels and anything that worries you, and we normally come back within one working day. Some sites still need a visit, and we’ll say so.
Are you fully insured?
Yes. We carry full insurance, and we have been trading since 2009.
How we price AHU cleaning
The price is fixed before any work begins. It’s based on:
- Site requirements such as sign-in and permits
- Where the site is and how we reach it
- How many systems or sites are involved
- The condition we find in the survey
The cost depends on how big the system is, what state it’s in and access to every part of it. We give you a fixed price before work begins, so you know where you stand.
What to send for a quote
You don’t need the technical terms. Just send:
- Detail shots of panels, filters and grilles
- The times we could work without disrupting the site
- Any symptoms, from odd noises to smells or leaks
- The paperwork from the last visit, if you have it
To get a fixed quote, call 0345 646 2711 or email us with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You’ll typically have a quote within one working day.
Also near Green Street
Other services in Green Street
Managing agents and facilities teams in Green Street
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we can quote for the whole system.
Signs you need AHU cleaning in Green Street
It matters for two reasons: air quality, since the unit feeds occupied rooms, and performance, since dirt makes it strain. For the people using the building every day, that’s the air they breathe for hours on end.
Common reasons sites call us are:
- Plant that needs cleaning after a refit
- Condensate trays that will not empty
- Fan sections that haven’t been cleaned in years
- Dirty filters cutting the airflow
Shenley Hospital, about 1.6 miles north-west, is the nearest hospital to Green Street, and healthcare sites of every size need their supply air kept clean.
What your quote should include
- If the quote is a fixed price or an estimate
- When they can work, and whether that is outside your opening hours
- Whether a survey comes first
- Proof of insurance
What the work involves, part by part
Internal casing and panels
Access doors and panels are opened in turn and closed properly afterwards, and check every one is shut.
Drain trays
Drain trays can rust and leak over time. We record their condition with photos so repairs can be planned.
Between visits
Good habits slow the build-up between visits. Our tips:
- Stick to the filter change plan
- Book the next check in line with the report
- Flag stale or damp smells in the supply air
- Report stiff or damaged access doors
When we’ve closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to make sure it stays clear.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.