Hampshire · Air handling unit cleaning
AHU Cleaning in Lower Farringdon
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Lower Farringdon, surveyed first and signed off with a written report and pictures. Ask us for a fixed quote.
- Units needing a clean before a new tenant or handover
- Stale or musty smells from the ventilation
- Condensate trays that won’t empty
What happens if it’s left?
When the unit is clean, less dirt reaches the ducts, so the whole system stays cleaner for longer. That makes the next inspection of a building in Lower Farringdon simpler. A fault that closes a site in a village like Lower Farringdon affects everyone who depends on it.
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all play a part.
Why Lower Farringdon businesses choose us
- We’re fully insured
- Work around your opening hours, with 24/7 emergency cover
- Fixed quotes, typically within one working day
- We diagnose before we treat
Take a look at our cost guide and how to check a contractor.
AHU cleaning in Lower Farringdon, done properly
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Clearing and cleaning the tray is central to every AHU clean. The work covers supply and extract fans, dampers and louvres and drain trays, and common reasons people get in touch are leaves and litter drawn into the unit and fan sections that haven’t been cleaned in years.
In rural areas, ventilation units are often in roof voids or outbuildings, where filters and drain trays get forgotten.
Think of the report as the system’s health record: a dated account with pictures of everything we did. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal and sits alongside the report.
- Place
- Lower Farringdon (GU34)
- Wider area
- Hampshire
- Paperwork
- Photo report after every visit
- Quote
- A fixed price before work begins
- Hours
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
What affects the cost of AHU cleaning
We quote each job individually. This is what makes a difference:
- The condition we find in the survey
- Site rules, permits and inductions
- When the work can happen, such as evenings, overnight or weekends
- The size of the system
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, which can make the next visit longer. If you are unsure, ring 0345 646 2711 or use the quote form and we will give you an honest view and a fixed quote.
Asking for a quote
When you contact us, it’s useful to have:
- Problems your staff have spotted
- Your last certificate, test record or report
- Any access panels or hatches you can see
- When the site is open and when it’s quiet
There’s no standard price list, because no two systems are the same. Instead, we look at your site first, from photos or a survey, then send a fixed quote. To start, call 0345 646 2711 or email us.
What happens on the day
There are three stages on the day: 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 photos. The middle part takes longest, which takes from a few hours for a compact unit to a day or more for a large one. Pictures of the system and its access let us plan the work in Lower Farringdon before we set off.
- First we agree when the unit can be switched off, including evenings or weekends.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- After photos are taken and the certificate issued.
Before we arrive
- Dig out any earlier paperwork for the system
- Let us know about parking and loading
- Name a contact who can let us in at the agreed time
Getting 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.
Related advice
Lower Farringdon questions
Can you come to Lower Farringdon after we close?
Yes, out-of-hours work is a big part of what we do. It means the site in Lower Farringdon keeps running as normal. Let us know the hours you’re closed and we will book within them.
Will you come out to Lower Farringdon?
Yes. Villages and rural sites across the South East are part of our work, Lower Farringdon included. Just mention lanes, gates or anything else about the site when you book.
How long does it take to clean an air handling unit?
Cleaning takes a single shift for a typical unit, longer for large or heavily soiled ones. Bigger units can be phased, so call 0345 646 2711 or drop us a line to talk it through.
Can you quote from pictures?
Usually, yes. Send a few wide photos plus close-ups of panels, filters or grilles, and we usually come back within one working day. If pictures aren’t enough, we’ll survey first.
What is TR19?
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.
Do you clean the ductwork as well?
Yes. We reach the ducts through access panels, and any sections we cannot reach are noted in the report, and new panels can be fitted.
Which parts of an air handling unit do you clean?
Filters, coils, drain trays, the fan and the internal surfaces are all covered. What happens to the filters is agreed when we quote.
How often should an air handling unit be cleaned?
There’s no single answer; it comes down to the building and the unit. Regular inspection shows when it’s due, and we’ll suggest an interval after the first clean.
AHU cleaning around Lower Farringdon
At about 47 miles from central London, Lower Farringdon sits well inside the area we cover. Evening, overnight and weekend visits are all possible. The nearest hospital to Lower Farringdon is Alton Community Hospital, 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 Lower Farringdon, and healthcare sites of every size need their supply air kept clean.
Lower Farringdon is about 3 miles south of Alton, in Hampshire. Whether your site is in the middle of Lower Farringdon or further out, AHU cleaning is available to all kinds of commercial premises, from small sites to large estates. Across Hampshire, we cover 683 places, and Lower Farringdon is one of them. You can also see our page for Guildford, about 20 miles away.
Every address in GU34 is covered for AHU cleaning, from the main roads to the quietest streets. That includes premises on Gosport Road, Brightstone Lane and Shirnall Meadow and the roads around them. We also cover the places around Lower Farringdon: Farringdon (1 mile east), Upper Farringdon (1 mile east), Chawton (2 miles north), Hartley Mauditt (2 miles east) and Alton (3 miles north). Larger places within reach include Basingstoke (12 miles north-west), Winchester (14 miles west), Fleet (13 miles north-east), Horndean (14 miles south), Aldershot (14 miles north-east) and Petersfield (8 miles south).
What’s near Lower Farringdon
Locally, jobs take us to businesses close to Royal Oak pub. The nearest railway station is Alton station, about 3 miles north of the centre. Other landmarks nearby include Alton Community Hospital (2 miles north) and The Romany Museum (2.6 miles south-east). Green spaces nearby include Red Hill.
Do you need AHU cleaning in Lower Farringdon?
Filters that aren’t changed or cleaned on time clog up, cutting airflow and sometimes letting dirty air bypass them altogether. Then the rest of the unit takes the load.
Most sites get in touch after spotting one of these:
- Leaves and litter drawn into the unit
- Dirty coils holding back the airflow
- Filters that are clogged or overdue
- Dirty fans and fan housings
In Lower Farringdon, we look inside the system before deciding what needs cleaning.
What your quote should include
- What hours they’ll be on site
- How areas they can’t reach will be recorded
- If they look at the system before pricing
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
When it’s something else
AHU cleaning cannot fix everything, and we’d rather say so up front. It doesn’t solve:
- Mechanical faults with motors, belts or bearings
- Controls and BMS settings that run the unit
- Ventilation that was badly designed in the first place
If you are not sure, just ring 0345 646 2711 or use the quote form and we will give you a straight answer.
What the work covers
- Dampers and louvres
- Filter sections
- Drain trays
- Heating and cooling coils
- Supply and extract fans
- Internal panels
Different parts, different methods
Drain trays
Standing water in a tray sits right where the air passes. We clean it and report anything about the tray or drain that needs fixing.
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. We check them, and clean or change them as agreed in the quote, and clean the filter housing.
Aftercare tips
No system stays clean for ever, but care slows the build-up. A few tips:
- Diary the inspection date recommended in the report
- Keep inspection doors on the unit in good order
- Keep the area around the fresh air intake clear
- File each AHU report in the maintenance log
Keep filter changes on schedule between cleans, as that does more than anything to keep the unit clean. Record each change in the maintenance log.
Keep the unit’s doors and panels in working order. If a section is hard to get into, it tends not to get checked.