Hampshire · Air handling unit cleaning
Air handling unit cleaning in Farnborough, Hampshire
AHU cleaning across Farnborough and nearby, booked around your opening hours and signed off in writing with pictures.
- Units needing a clean before a new tenant or handover
- Rooms that smell stuffy when the system runs
- Dirty filters cutting the airflow
About our AHU cleaning in Farnborough
Drain trays under cooling coils are meant to empty. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Cleaning and clearing it is a key part of the job. If you are dealing with units that have only ever had filter changes and stale or musty smells from the ventilation, we can put it right.
In a town like Farnborough, ventilation cleaning usually means offices, schools, surgeries, care homes and leisure buildings. Their supply and extract ducts all gather dust over time.
A written report with pictures follows every visit, so there’s a dated record of the work. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Location
- Farnborough (GU14, GU11, GU17)
- Region
- Hampshire
- Paperwork
- Report and photos after the visit
- Price
- A fixed quote up front
- When we work
- When your site is closed, plus a 24/7 line
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
Leave it or put it right?
Tenants, auditors and owners may want proof that the air handling plant is kept clean. Our certificate and photo report give you clear evidence, for audits, tenants or your own peace of mind. With a fire risk assessment or inspection due, getting the work done first puts you on the front foot.
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, and a neglected system can mean more work. If you’re unsure, ring 0345 646 2711 or use the quote form for straight advice and a fixed quote.
Why choose Duct Doctor in Farnborough
- Fixed quotes from a survey or photos
- Fully insured
- Every job surveyed first
- A single point of contact for sites across the South East and London
Take a look at what affects the cost or how to check a contractor.
AHU cleaning in Farnborough: local notes
Food Standards Agency data includes about 35 schools, colleges and universities, about 21 care, childcare and hospital premises and about 5 hotels and guest houses within roughly a mile and a half of the centre of Farnborough. Busy, occupied buildings like these are where clean supply air matters most. The nearest hospital to Farnborough is Frimley Park Hospital, about 2 miles north-east. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. Farnborough is about 32 miles from central London, well within the area we cover across London and the South East. Evening, overnight and weekend visits are all possible.
Healthcare buildings such as Frimley Park Hospital, about 2 miles north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Farnborough, yours matters too. For schools like Tower Hill Primary School, the holidays are the usual time to inspect and clean ventilation.
Farnborough is about 31 miles south-west of City of Westminster, in Hampshire. From the centre of Farnborough to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. 683 places in Hampshire are on our list, large and small. There’s also a page for Guildford, about 9 miles away.
Postcode districts we cover here for AHU cleaning: GU14, GU11 and GU17. Streets in the area include Wallis Square, Church Road West and Longleat Square, all of which we cover for AHU cleaning. You will find Farnborough on the A325 and A327, which makes it straightforward for our technicians to reach for out-of-hours visits. Nearby, we also carry out AHU cleaning in Cove (1 mile west), North Camp (1 mile south-east), Southwood (1 mile west), Mytchett (2 miles east) and Ash Vale (3 miles south-east). Further out, we also cover Basingstoke (15 miles west), Fleet (3 miles south-west), Alton (13 miles south-west), Yateley (4 miles north-west), Bordon (13 miles south) and Hook (8 miles west). Farnborough is one of the larger places we cover in Hampshire for AHU cleaning.
Landmarks near Farnborough
Typical jobs here are in premises near The Tilly Shilling pub, Henry Tyndale School and Snaky Lane Community Wildlife Area and the streets around them. Other local landmarks include National Aerospace Library (0.8 miles south-east) and Cove School (0.6 miles north-west). The nearest railway station is Farnborough Main station, roughly 0.5 miles east. Well-known places in the area include Frimley Park Hospital (2 miles north-east) and Hart Shopping Centre (3.3 miles west). For a walk, there’s Aunt's Pool and Ball Hill.
Also near Farnborough
Other services in Farnborough
Questions from Farnborough
Do you do school ventilation cleaning in Farnborough in the summer holidays?
Yes. The holidays are the usual time for school work. Food Standards Agency records list about 35 schools, colleges and universities with registered kitchens within about a mile and a half of Farnborough. Just give us a ring on 0345 646 2711 or drop us a line with your term dates and we will plan around them.
Is Farnborough in your area for AHU cleaning?
Yes. We work across London and the South East, and Farnborough is part of that. Get in touch with the details and we’ll arrange a survey.
Can one contract cover all our sites?
Yes. One number covers all your sites across London and the South East, and visits can be set on a regular cycle.
Can you quote from photos?
Often, yes. With good pictures, the site type and your last report, we can price many jobs. Where we can’t see enough, we arrange a survey.
Do you have a 24/7 line?
Yes. There’s a 24/7 emergency line, for problems that can’t wait. Call us any time and explain what’s happened.
How much notice do you need?
The more notice, the better, especially for out-of-hours work. We normally quote within one working day, and there’s a 24/7 line for emergencies.
Are you accredited?
CHAS, SafeContractor, ISO 9001 and BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. We’ve been trading since 2009 and we are fully insured.
Which parts of an air handling unit do you clean?
All the internal parts the air touches, from intake to discharge, including coils, fan and drain trays. You get a photo report showing each part before and after.
Staff cleaning versus specialist work
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. Leave those to us.
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, and that’s where we come in.
How the visit works
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool first, and the area around the work is covered and protected. The work itself takes half a day to a full day per unit, with large plant planned over several shifts. The more we can see of the system beforehand, the smoother the visit to Farnborough will be.
- 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.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- We clean out the drain tray and make sure it drains.
- A TR19® certificate and photo report follow the clean.
Before we arrive
- Make sure equipment near the work can be switched off and left to cool
- Let us know about parking and loading
- Arrange a key holder or contact on site
How to get a quote
To get a fixed quote, phone us on 0345 646 2711, or send details by email and tell us the type of site, your opening hours and roughly what the system looks like. A few pictures and your last certificate or report help a lot. We typically come back within one working day.
Advice
How the job changes from site to site
Drain trays
The drain tray collects water from the cooling coil. We clear standing water, clean out slime and check the outlet is draining.
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. The space underneath is protected with sheeting first.
For landlords and multi-site operators
From a single site to a large estate, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with photos.
Running several sites is easier with one contractor. We cover South East England and London, so visits at different addresses can be planned together and kept to a regular schedule.
Between visits
To keep the system working properly between visits:
- Check the drain tray is emptying during routine visits
- Keep the area around the fresh air intake clear
- Stick to the filter change plan
- File each AHU report in the maintenance log
Restart the unit with your site team or maintenance contractor once we’ve finished. Keep an eye on the condensate drain over the next few days to make sure it stays clear.
Make sure access doors and panels on the unit open easily. Sections that are awkward to open are the ones that get skipped.
Do you need AHU cleaning in Farnborough?
Wherever there’s a cooling coil, there’s condensate. If the drain tray outlet blocks or the tray doesn’t fall properly, water stands in it, and that is where slime and odours start.
These are the problems we see most often:
- Fan sections that haven’t been cleaned in years
- Condensate trays that won’t empty
- Units needing a clean before a new tenant or handover
- Filters that are clogged or overdue
If you manage offices or shops near Farnborough Main station, their ventilation can be inspected and cleaned out of hours.
What your quote should include
- How VAT is shown on the quote
- Whether the quote is based on a survey or photos
- Whether inaccessible sections are listed on the report
- Whether a written report and pictures are included