Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Shenley, Hertfordshire
AHU cleaning for Shenley and the surrounding area: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.
- Rooms that smell stuffy when the system runs
- Blocked condensate drains and slimy trays
- Dust-coated heating and cooling coils
Different parts, different methods
Drain trays
Condensate from the coil drips into a tray beneath it. We clear standing water, clean out slime and check the outlet is draining.
Rooftop and plant room units
Many AHUs sit on roofs or in plant rooms with limited access. We plan safe access as part of the survey so the quote reflects it.
AHU cleaning for kitchens and businesses in Shenley
We clean air handling units for buildings in Shenley and across Hertfordshire, working to TR19® Air, in offices, schools, hospitals, care homes and retail. Units are cleaned when the site can spare them, often evenings, overnight or weekends. Typical jobs include dirty fans and fan housings and air handling units with blocked filters, on supply and extract fans, dampers and louvres and drain trays.
In a place like Shenley, air handling units are often tucked into roof spaces or small plant rooms, out of sight and easy to overlook. Filters, coils and drain trays need attention whatever the size of the unit.
The report is your system’s health record: dated, with pictures, and showing what was done. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal, ready for your insurer.
- Location
- Shenley (WD7)
- Wider area
- Hertfordshire
- Paperwork
- Report and photos after the visit
- Quote
- Fixed quote, typically within a working day
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
Landlords, agents and facilities managers
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. With shared responsibility, good records help everyone.
Records are where multi-site compliance often slips. Every visit ends with a dated report and pictures, so you can show an insurer or inspector what was done at each site.
Signs you need AHU cleaning in Shenley
Filters that are not changed or cleaned on time clog up, which cuts the airflow and can let air slip round the filter. After that, the coils and fan collect what the filter should have caught.
Most sites get in touch after spotting something like this:
- Drain trays holding standing water
- Plant that has been serviced but not cleaned
- Air handling units with blocked filters
- Air handling units due a clean after building work
Classrooms and halls at schools such as Shenley Primary School are easiest to work in when pupils are away.
Comparing quotes
- What hours they’ll be on site
- Proof of accreditation you can verify
- When the next visit should be, and why
- Whether they’re fully insured
What happens on the day
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. When the team arrives, the work area is protected and the relevant equipment is switched off to cool, and the work takes anything from half a day for one small unit to several shifts for a plant room full of them. Evenings, weekends or a closed day all work for a site in a place like Shenley.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- Drain trays are cleared and cleaned and the outlet checked.
- You get a TR19® certificate and a photo report.
Getting ready for the visit
- Let us know how we reach the system, including roofs, risers and plant rooms
- Agree a time when the area can be out of use
- Clear the space around the work
How to get a quote
Quotes are quick. 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.
Read more
Ventilation in Shenley buildings
Food Standards Agency data includes about 3 schools, colleges and universities and about 7 hospitals, care homes and childcare premises in Shenley and the streets around it, up to about 1.5 miles out. Busy, occupied buildings like these are where clean supply air matters most. Shenley is about 16 miles from central London, well within the area we cover across London and the South East. Evening, overnight and weekend visits are all possible. Shenley’s nearest hospital, Shenley Hospital, is about less than half a mile west. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Healthcare buildings such as Shenley Hospital, about under half a mile west, depend on their ventilation; if you manage a surgery, clinic or care home near Shenley, yours matters too.
Shenley is about 2 miles north of Borehamwood, in Hertfordshire. Sites in Shenley get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with pictures. Shenley is one of 381 towns, villages and districts in Hertfordshire where we work for commercial clients. We also work in London, around 16 miles away.
We cover every part of the WD7 postcode area for AHU cleaning and the roads nearby. You will find streets such as London Road, Southerton Way and Juniper Gardens, all of which we cover for AHU cleaning. Main roads around Shenley include the B5378, which makes travel easy for AHU cleaning. Other places close to Shenley include Green Street (1 mile south-east), Ridge (2 miles east), Well End (2 miles south-east), Borehamwood (2 miles south) and South Mimms (2 miles east). Further out, we also cover Watford (5 miles south-west), Hemel Hempstead (8 miles north-west), St Albans (4 miles north-west), Welwyn Garden City (8 miles north-east), Harpenden (9 miles north) and Hoddesdon (12 miles east).
Near you in Shenley
Typical jobs here are in premises near Manor Lodge School, Hertswood Academy and The Black Lion pub, among other places. The closest station to Shenley is Radlett station, roughly 1.4 miles south-west of the centre. A little further out are Radlett and District Museum (1.5 miles south-west) and Shenley Hospital (less than half a mile west). Green spaces nearby include Verulamium Lake and Broad Colney Lakes.
In-house cleaning or a specialist?
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.
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
Nearby places to Shenley
Other services in Shenley
Why it’s worth doing now in Shenley
Stuffy rooms and stale smells in a building in Shenley can sometimes be traced back to the AHU. A clean tackles the source instead of masking it. You choose the date of a planned visit, and a breakdown never asks.
Working hours, access and the scale of the site all affect the cost. Each of those is built into the quote, and the price is fixed before work begins.
Why choose Duct Doctor in Shenley
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- We diagnose before we treat
- We are fully insured
- CHAS, SafeContractor and ISO 9001
Read what affects the cost and our accreditations.
What affects the quote in Shenley
There’s no set price list, because sites vary so much. What we look at:
- The size of the system
- The times the site is available
- Where the site is and how we reach it
- Any permits to work or inductions
The cost depends on the size of the system, the condition it’s in and access to every part of it. You get a fixed price before any work starts, so there are no surprises.
Helping us quote
To help us quote quickly, send us:
- Any access panels or hatches you can see
- The postcode and the type of business
- The times we could work without disrupting the site
- How we’d reach plant on a roof or in a plant room
For AHU cleaning in Shenley, call us on 0345 646 2711, or email photos. Let us know the site type and the opening hours, and send photos or your last report if you can. A fixed quote typically follows within one working day.
Shenley: your questions answered
Do you do school ventilation cleaning in Shenley in the summer holidays?
Yes. Half-terms and the summer break are the natural time for school work. With about 3 schools and colleges on the FSA’s register within roughly a mile and a half of Shenley, it pays to plan holiday dates ahead. Just phone us on 0345 646 2711 or send us an email with your term dates and we will plan around them.
Can you come to Shenley after we close?
Yes, evening, overnight and weekend work is normal for us. That way a site in Shenley doesn’t have to lose a day’s trading. Tell us your opening hours when you ask for a quote.
What do you do to protect the area?
Protection goes down first: floor sheeting and covers over nearby surfaces and equipment. We tidy up and take our waste away before we leave.
Can you look after several sites?
Yes. Our area covers London and the South East, so sites at different addresses can be planned together as one programme. Each site gets its own report and photos.
Do you work in Shenley?
Yes. We work in Shenley and across Hertfordshire, within our South East and London area. To book, phone us on 0345 646 2711 or use the quote form.
What do you need from me for a quote?
The site address, the type of premises and your opening hours, along with a few pictures and any previous report.
What types of premises do you cover?
Restaurants and pubs, hotels, schools and colleges, hospitals and care homes, offices and retail, as well as food production and leisure sites.
Can you fix a faulty AHU?
Mechanical repairs to the unit are for your HVAC maintenance contractor. We will flag anything we notice during the clean.