Hampshire · Air handling unit cleaning
Air handling unit cleaning in Littleton, Hampshire
AHU cleaning for businesses, landlords and public buildings in Littleton. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Intake sections clogged with outdoor debris
- Blocked condensate drains and slimy trays
- Air handling units with blocked filters
AHU cleaning in Littleton
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. Whatever builds up inside it travels with that air, which is why we clean the unit itself, not just the ducts. Common call-outs are for blocked condensate drains and slimy trays and dirty filters cutting the airflow, across internal panels, dampers and louvres and heating and cooling coils.
In rural areas, ventilation units are often in roof voids or outbuildings, where filters and drain trays get forgotten.
Insurers, fire officers and environmental health officers all look at records. So every job comes with a written report and pictures, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Place
- Littleton (SO22)
- Wider area
- Hampshire
- Records
- Report and photos after the visit
- Price
- Fixed quote, usually within a working day
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
How it works
The visit has three parts: getting the area ready, doing the work and signing it off. Set-up means sheeting and making equipment safe, while signing off means the written report and pictures. Most of the time goes on the work itself, and that takes half a day to a full day per unit, with large plant planned over several shifts. If the van will struggle with a lane or gateway near Littleton, let us know and we’ll plan around it.
- We start with a survey of the unit and a fixed quote for the work.
- With your site team, the unit is switched off and isolated, then the area around it 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.
- We close up the unit and send the certificate and before and after pictures.
How to prepare
- Tell us the best time to work, such as after service or at a weekend
- Plan for cooking equipment or plant to be off before we arrive
- Mention any locked doors, roof access or ceiling voids
How to get a quote
Photos are the quickest way to a quote: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Tell us what kind of site it is and when it’s open, and we can price many jobs without a visit.
Read more
Leave it or put it right?
When the unit is clean, less dirt reaches the ducts, so the whole system stays cleaner for longer. It also means the next inspection has less to find. Systems in rural buildings are often out of sight and out of mind.
A single site or a whole portfolio, we price it on the same basis: what needs doing, how we get to it and when. You’ll have a fixed price before work begins.
Why book with us
- Every visit written up, with pictures
- Accredited under CHAS and SafeContractor, with ISO 9001
- Survey first, then a fixed quote
- Out-of-hours work and a 24/7 emergency line
Take a look at how cleaning jobs are priced or our accreditations.
Honest limits
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It does not solve:
- The supply and extract ducts, quoted separately
- Mechanical faults with motors, belts or bearings
- Ventilation that was badly designed in the first place
Not sure which it is? You can ring 0345 646 2711, or send details by email and we will tell you honestly before you book.
What the work covers
- Internal panels
- Heating and cooling coils
- Supply and extract fans
- Dampers and louvres
- Filter sections
- Drain trays
What affects the cost of AHU cleaning
There’s no set price list, because sites vary so much. What we look at:
- The condition we find in the survey
- Whether we need access equipment or extra panels
- Any permits to work or inductions
- How many systems or sites are involved
Several systems or sites on one quote can make for a more efficient booking. Tell us about everything you’d like looked at, and you’ll get one fixed quote.
What to send for a quote
When you contact us, these details help:
- The times we could work without disrupting the site
- Your last certificate, test record or report
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Where the site is and what kind of site it is
Getting a quote does not take long. Call or email with a few details and you will normally have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Your questions about AHU cleaning in Littleton
Do you work overnight in Littleton?
Yes. We work evenings, overnight and at weekends. The work in Littleton can fit around your hours. When you give us a ring on 0345 646 2711 or drop us a line, mention when the site is quiet.
Do you clean school ventilation in Littleton in the holidays?
Yes, out-of-term visits are normal for schools. Food Standards Agency records list about 8 schools, colleges and universities with registered kitchens within about a mile and a half of Littleton. Booking early in the term gives the best choice of holiday dates.
How do you keep the site clean during the work?
With sheeting and covers, before anything else happens. We keep the work contained and clean down when we finish.
Can you quote from photos?
Yes, if we can see what we need. If not, a site survey comes first, then a fixed quote.
Which parts of an air handling unit do you clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. We confirm the scope after looking at the unit.
How much notice should we give?
The more notice, the better, especially for out-of-hours work. We typically quote within one working day, and there’s a 24/7 line for emergencies.
Are you fully insured?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.
Do you need to switch the unit off?
Yes. The fan must be stopped and the unit isolated, so we plan it for a time that suits the building.
What we’re called out for in Littleton
Dirt in an AHU matters in two ways: the unit supplies the air people breathe, and a dirty unit has to work harder. For the people using the building every day, that’s the air they breathe for hours on end.
Clients normally contact us when they notice one of these:
- Condensate trays that will not empty
- Plant that needs cleaning after a refit
- Intake sections clogged with outdoor debris
- Units that have only ever had filter changes
Healthcare ventilation, from large hospitals like Royal Hampshire County Hospital (about 1.9 miles south-east) to small clinics, depends on clean filters, coils and ducts.
Before you book anyone
- What’s included in the scope, part by part
- When they can work, and whether that’s outside your opening hours
- Whether they’re fully insured
- Whether a written report and photos are included
Looking after it afterwards
Think of this as the after-treatment advice, in brief:
- Diary the inspection date recommended in the report
- Do not ignore odours coming through the grilles
- Change filters on schedule and log each change
- Keep the area around the fresh air intake clear
Photos in the report cover the filters, coils, drain tray, fan and casing, and note any part we couldn’t get to. It also notes faults we spotted, such as damaged panels or a blocked drain.
Make the drain tray part of every maintenance visit. A drain that’s cleared early never gets to the slime stage.
What staff can safely do
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
Keep a record of what your team does. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, alongside our reports.
Nearby places to Littleton
Also in Littleton
What AHU cleaning looks like in Littleton
There are about 8 schools, colleges and universities and about 6 caring premises (care homes, nurseries and hospitals) on the FSA’s food hygiene register in and around Littleton, up to about a mile and a half out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Littleton’s nearest hospital, Royal Hampshire County Hospital, is about 1.9 miles south-east. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
School buildings such as Harestock Primary School are normally done in the holidays, so classrooms are not disturbed.
Littleton is about 2 miles north-west of Winchester, in Hampshire. Whatever kind of site you run in Littleton, AHU cleaning is something we can help with. We can work out of hours so the site keeps running. Littleton is one of 683 places in Hampshire where we work for AHU cleaning. There’s also a page for Southampton, roughly 12 miles from Littleton.
Our technicians cover all of SO22 for AHU cleaning and the streets around it. AHU cleaning is available to premises on Rutledge Drive, Fyfield Way and Hilden Way and nearby roads. Neighbouring places we cover for AHU cleaning include Harestock (1 mile south-east), Weeke (1 mile south-east), Sparsholt (1 mile south-west), Westley (2 miles west) and Abbotts Barton (2 miles south-east). Within a short drive, we also cover Eastleigh (8 miles south), Andover (10 miles north-west), Totton (13 miles south-west), Chandler's Ford (7 miles south), Hedge End (12 miles south) and Romsey (9 miles south-west).
Near you in Littleton
Locally, jobs take us to businesses close to Henry Beaufort School and The Running Horse pub, among other places. The closest station to Littleton is Winchester station, roughly 1.9 miles south-east. A little further out are Royal Observer Corps Museum (1.8 miles south-east) and Royal Hampshire County Hospital (1.9 miles south-east). Open spaces near Littleton include Winnall Moors and Twyford Down.