Hampshire · Air handling unit cleaning

Sherborne St John AHU cleaning

AHU cleaning for Sherborne St John and the surrounding area: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.

  • Leaves and litter drawn into the unit
  • Dust-coated heating and cooling coils
  • Blocked condensate drains and slimy trays

Need AHU cleaning in Sherborne St John?

When something else is needed

In fairness, some problems need a different fix:

  • Controls and BMS settings that run the unit
  • Dirty ducts beyond the unit itself
  • Faulty motors, drives or bearings

If you are not sure, just ring 0345 646 2711 or use the quote form and we will give you a straight answer before you book.

Where we work

  • Drain trays
  • Dampers and louvres
  • Internal panels
  • Supply and extract fans
  • Heating and cooling coils
  • Filter sections

How we handle AHU cleaning in Sherborne St John

Every supply and extract system relies on the air handling unit at its centre: air is pulled in, filtered, conditioned and sent out through the ducts. Anything that collects inside the unit can end up in the rooms it serves, which is why we clean the unit itself, not just the ducts. The work covers filter sections, heating and cooling coils and dampers and louvres, and common reasons people get in touch are debris and leaves in the fresh air intake and units needing a clean before a new tenant or handover.

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 are 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
Sherborne St John (RG24)
Wider area
Hampshire
Paperwork
Report and photos after the visit
Price
A fixed quote up front
Hours
Nights, weekends or holidays to suit you
Call
0345 646 2711
Updated
30 October 2026
The Duct Doctor team standing beside their branded white and blue vans

Multi-site and managed buildings

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.

When the building owner and the occupier are different, the lease normally sets out who maintains what. We are happy to deal with either side, and the report can go to both.

How it works

At the end of the visit, someone from your team can look over the work with us. Anything we couldn’t reach or that needs attention is pointed out there and then, and the same goes into the written report. All told, the work takes anything from half a day for one small unit to several shifts for a plant room full of them. Visits to a village like Sherborne St John are booked in advance, at a time that suits whoever runs the site.

  1. First the unit is surveyed, from pictures or a visit, and the scope agreed.
  2. The unit is shut down with your site team and the area protected.
  3. We clean or change the filters as agreed, then clean the coils, fan and internal panels.
  4. Standing water and slime come out of the tray and the drain is checked.
  5. We close up the unit and send the certificate and before and after pictures.

Before we arrive

  • Have your last certificate or report to hand
  • Let us know how we reach the system, including roofs, risers and plant rooms
  • Mention any sign-in, permit or induction we need

Get a fixed quote

Here’s what helps us quote: the address, the type of site and when it’s open, pictures of the system and the last certificate or report, if there is one. Then ring 0345 646 2711 or email us.

Ask for a quote

Related advice

What staff can safely do

Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.

When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, they should report it rather than try to fix it. We can diagnose it and quote.

Sherborne St John questions

Can a school’s ventilation in Sherborne St John be done out of term time?

Yes, out-of-term visits are normal for schools. There are about 4 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Sherborne St John. You can give us a ring on 0345 646 2711 or email us with the dates the site is empty.

Is Sherborne St John within the area you cover?

Yes, Sherborne St John is part of our area, however small the site. Just mention lanes, gates or anything else about the site when you book.

How far ahead should we book?

For planned work, earlier is better, especially if the next clean or test is due soon. Emergencies are different, because our line is open 24/7.

Will we get paperwork for the AHU clean?

Yes, a TR19® certificate and a photo report. It includes a recommended date for the next check.

What is TR19?

TR19® is the BESA specification for keeping ventilation systems clean. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.

What if parts of the system cannot be reached?

Anything we cannot reach goes on the report, with photos where possible, and we explain what access is needed, such as extra access panels in ductwork.

What should I send you?

Where the site is, what it is and when it’s open, along with a few pictures and any previous report.

Can you quote from pictures?

Yes, if we can see what we need. Otherwise, we book a survey at a time that suits the site, and the quote follows that.

What AHU cleaning looks like in Sherborne St John

Going by the FSA’s register, there are about 4 schools, colleges and universities and about 13 caring premises (care homes, nurseries and hospitals) serving food within 1.5 miles or so of the middle of Sherborne St John. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. The nearest hospital to Sherborne St John is Basingstoke and North Hampshire Hospital, about 1.1 miles south. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. About 46 miles out from central London, Sherborne St John is part of the South East area we work across. Evening, overnight and weekend visits are all possible.

Basingstoke and North Hampshire Hospital, about 1.1 miles south, is the nearest hospital to Sherborne St John, and healthcare sites of every size need their supply air kept clean. Classrooms and halls at schools such as Sherborne St John Church of England Primary School are easiest to work in when pupils are away.

Sherborne St John is about 2 miles north of Basingstoke, in Hampshire. For AHU cleaning in and around Sherborne St John, please phone us on 0345 646 2711 or drop us a line for a fixed quote. Our area covers London and the South East, including Sherborne St John. We cover 683 places across Hampshire, large and small. We also work in Reading, about 12 miles from Sherborne St John.

Work in RG24 is surveyed, quoted and booked the same way as anywhere else. You’ll find streets such as Cranes Road, Bourne Field and Church Path, and we cover them all for AHU cleaning. We also cover Rooksdown (1 mile south-west), Winklebury (2 miles south), Basingstoke (2 miles south), Worting (3 miles south-west) and South Ham (3 miles south). Further out, we also cover Farnborough (15 miles east), Fleet (12 miles east), Aldershot (15 miles east), Alton (12 miles south-east), Yateley (12 miles east) and Tadley (4 miles north).

Landmarks near Sherborne St John

In Sherborne St John, that means kitchens and buildings near Everest Community Academy. For rail, the closest station is Basingstoke station, about 2.1 miles south-east. Well-known places in the area include Basing House (3.1 miles south-east) and Basingstoke and North Hampshire Hospital (1.1 miles south). The countryside around Sherborne St John includes Daneshill Park Woods.

Map of Sherborne St John © OpenStreetMap contributors

How the job changes from site to site

Rooftop and plant room units

Ceiling-mounted and compact units are cleaned too. The space underneath is protected with sheeting first.

Fans and fan sections

The fan section is cleaned with the unit switched off and isolated with your site team.

Aftercare tips

A little care between visits keeps the system in better shape. We recommend:

  • Report stiff or damaged access doors
  • Check the drain tray is emptying during routine visits
  • Change filters on schedule and log each change
  • Diary the inspection date recommended in the report

Stick to the filter change schedule, as that does more than anything to keep the unit clean. Record each change in the maintenance log.

Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.

Fixed quotes for AHU cleaning in Sherborne St John

A fixed price needs a few facts first. We look at:

  • Any permits to work or inductions
  • How big the system is
  • How easy every part is to reach
  • The times the site is available

The price reflects the work, not guesswork. That’s why we survey first, from photos or on site, and why the quote is fixed before any work starts.

What to send for a quote

A few details help us quote accurately. When you get in touch, it helps to send:

  • The paperwork from the last visit, if you have it
  • Where the site is and what kind of site it is
  • Your opening hours and when the area is out of use
  • How we’d reach plant on a roof or in a plant room

Need a price for AHU cleaning? Please ring 0345 646 2711 or send us an email with a few details about the site. We’ll talk you through the work and give you a fixed quote before anything is booked.

BESCA Vent Hygiene EliteMember, cleaning to BESA TR19® Grease
CHAS · SafeContractorISO 9001 and fully insured
Certificate and photo reportWith every clean
24/7 emergency calloutEvenings, nights and weekends
Since 2009South East England and London