Hampshire · Air handling unit cleaning
Air handling unit cleaning in Farringdon, Hampshire
Specialist AHU cleaning for Farringdon: diagnosis first, then a fixed quote, the work and a report with pictures. Ask us for a fixed quote.
- Drain trays holding standing water
- Dust-coated heating and cooling coils
- Stale or musty smells from the ventilation
About our AHU cleaning in Farringdon
We clean air handling units for buildings in Farringdon and across Hampshire, 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 stale or musty smells from the ventilation, on filter sections, heating and cooling coils and dampers and louvres.
In rural areas, ventilation units are often in roof voids or outbuildings, which makes them easy to overlook.
Duct Doctor has been trading since 2009, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
- Place
- Farringdon (GU34)
- Region
- Hampshire
- Records
- Written report with photos
- Quote
- Fixed quote, typically within a working day
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
What we do, step by step
A visit follows the same order every time: sheeting and protection first, isolate whatever needs isolating, do the work, clear away and leave you the report. On site, the work takes half a day to a full day per unit, with large plant planned over several shifts. We agree a date with you, plan the drive to Farringdon and turn up when the site is quiet.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
Getting ready for the visit
- Allow time for equipment near the work to be turned off and cool down
- Have your last certificate or report to hand
- Mention any locked doors, roof access or ceiling voids
Ask for a quote
To get a fixed quote, phone us on 0345 646 2711 or email us with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. We usually come back within one working day.
Related advice
Questions from Farringdon
Do you offer AHU cleaning in Farringdon?
Yes, Farringdon is within the area we cover across London and the South East. You can give us a ring on 0345 646 2711, or email photos and let us know what needs doing.
Do you work in villages like Farringdon?
Yes, smaller places are covered as well as towns. Just mention lanes, gates or anything else about the site when you book.
Can you set up regular visits?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. The report from each visit recommends the next date.
What does TR19 mean?
It’s BESA’s specification and the benchmark insurers, fire officers and EHOs look to. It sets out inspection, cleaning and record keeping and expects a risk-based approach.
What happens if you cannot reach some of it?
We never leave them off the paperwork. You’ll know exactly which parts weren’t reached and why, and we can quote to improve the access.
What do you do to protect the area?
We cover floors and nearby surfaces with sheeting before any work starts, and waste is contained as we go. Before we leave, we tidy up and clean down.
Can you clean the ducts connected to the AHU?
Yes. Ventilation ductwork cleaning to TR19® Air is part of what we do. It’s often worth doing both at once, and we can quote for both.
When should our AHU next be cleaned?
That’s set by inspection, in line with TR19® Air. Units in heavy use or in sensitive buildings may need attention more often.
Staff cleaning versus specialist work
Keep a record of what your team does. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, next to our reports.
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 grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
How we price AHU cleaning
A fixed price needs a few facts first. We look at:
- What state the system is in
- How many systems or sites are involved
- The times the site is available
- Where the site is and how we reach it
A single site or a whole portfolio, the quote is built the same way: what needs doing, how we get to it and when. You’ll have a fixed price before we start.
What to send for a quote
Photos and a few facts are often enough to price the work. Send what you can of the following:
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- Wide photos of the system and the area around it
- The postcode and the type of business
- Close-ups of filters, grilles, hatches or access panels
For AHU cleaning in Farringdon, call 0345 646 2711 or use the quote form. Tell us what kind of premises it is and when it’s open, plus photos or the previous report if they’re to hand. We usually send a fixed quote within one working day.
What we’re called out for in Farringdon
Mechanical servicing keeps a unit running, but it does not always include cleaning the inside. So a unit can be well maintained and still dirty.
Signs it’s time to call us include:
- Dirty coils holding back the airflow
- Condensate trays that won’t empty
- Units that have only ever had filter changes
- Dirty fans and fan housings
For buildings in and around Farringdon, TR19® Air cleaning starts with an inspection.
Comparing quotes
- What insurance they carry
- Whether the price is fixed
- How they set the interval to the next visit
- What happens if part of the system can’t be accessed
Honest limits
An honest diagnosis matters more to us than a booking, so here’s what AHU cleaning won’t do:
- The supply and extract ducts, quoted separately
- A system that is undersized for the building
- Breakdowns that need a mechanical engineer
If in doubt, phone us on 0345 646 2711 or drop us a line and we will say what we think before you book.
Where we work
- Heating and cooling coils
- Dampers and louvres
- Drain trays
- Filter sections
- Internal panels
- Supply and extract fans
AHU cleaning in Farringdon: local notes
At about 47 miles from central London, Farringdon sits well inside the area we cover. Evening, overnight and weekend visits are all possible. Farringdon’s nearest hospital, Alton Community Hospital, is about 2 miles north. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Alton Community Hospital, about 2 miles north, is the nearest hospital to Farringdon, and healthcare sites of every size need their supply air kept clean.
Farringdon is about 3 miles south of Alton, in Hampshire. Every kind of commercial site in Farringdon, we can take on AHU cleaning. Visits can be booked for evenings, overnight or weekends so the site keeps running. 683 places in Hampshire are on our list, large and small. For sites nearby, see our Guildford page, about 20 miles away.
Work in GU34 is surveyed, quoted and booked the same way as anywhere else. Whether your site is on Hall Lane, Crows Lane and Gaston Lane or anywhere close by, we can help. Nearby, we also carry out AHU cleaning in Upper Farringdon (1 mile north-east), Lower Farringdon (1 mile west), Chawton (2 miles north), Hartley Mauditt (2 miles east) and Alton (3 miles north). We also work in nearby towns such as Basingstoke (12 miles north-west), Winchester (15 miles west), Fleet (13 miles north-east), Horndean (14 miles south), Aldershot (14 miles north-east) and Petersfield (8 miles south).
Near you in Farringdon
Typical jobs here are in premises near Rose and Crown Inn. The nearest railway station is Alton station, about 3 miles north of the centre. Well-known places in the area include The Romany Museum (2.3 miles south-east) and Alton Community Hospital (2 miles north). For a walk, there’s Selborne Hill.
Why deal with it now?
Facilities teams are often asked for evidence that the ventilation is looked after. A TR19® certificate and photo report give you that, for audits, tenants or your own peace of mind. If the system at a site near Farringdon fails, there may be nowhere nearby to move to.
Whatever the type of site, the quote works the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we’ll explain each part.
Why book with us
- Every job surveyed first
- CHAS, SafeContractor and ISO 9001
- Ventilation hygiene specialists since 2009
- Full insurance on every job
Take a look at our cost guide and how to check a contractor.
Aftercare tips
How long the results last depends on use and care. We suggest:
- Make sure the unit’s access doors open easily
- Plan the next inspection before the last report gets filed away
- Don’t ignore odours coming through the grilles
- Do not store bins or materials near the intake
Stick to the filter change schedule, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Keep the area around the intake clear. Anything around the intake is likely to be drawn in.