Hampshire · Air handling unit cleaning
Air handling unit cleaning in Charlwood, Hampshire
Professional AHU cleaning in and around Charlwood, booked around your opening hours and signed off in writing with photos.
- Drain trays holding standing water
- Dirty filters cutting the airflow
- Dust-coated heating and cooling coils
FAQs for Charlwood
Can you come to Charlwood after we close?
Yes, nights and weekends are routine for us. Your customers, staff or residents in Charlwood needn’t be disturbed. Your opening times are the first thing we ask for.
Can you get to a site in Charlwood?
Yes, we work in villages as well as towns, and Charlwood is covered. Let us know about access, parking and anything unusual about getting there when you book.
Is there a report after cleaning?
Yes, both a certificate and a report with photos. The report also suggests when the unit should next be inspected.
Can you quote from pictures?
Often, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Larger or hidden systems need a survey on site first.
Do you repair air handling units?
Our AHU work is cleaning rather than mechanical repair. Any faults we notice are recorded so your maintenance contractor can deal with it.
How much notice do you need?
That depends on the slot you want and the size of the job. Tell us your preferred dates when you ask for a quote, and if it’s an emergency, call us any time.
Can we book visits on a schedule?
Yes. We run scheduled maintenance contracts, with visits at the interval your system needs. Each report recommends when the next visit should be.
What is TR19?
TR19® is BESA’s specification for ventilation hygiene. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, while TR19® Air covers other supply and extract ductwork.
AHU cleaning for kitchens and businesses in Charlwood
An air handling unit is the heart of a building’s ventilation: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Whatever builds up inside it travels with that air, which is why we clean the unit itself, not just the ducts. If you’re dealing with plant that has been serviced but not cleaned and plant that needs cleaning after a refit, we can put it right.
Somewhere as small as Charlwood, ducted ventilation is normally limited to a school, a care home, a surgery or a converted business building, wherever there is one, but where it’s fitted, it needs the same inspection and cleaning as anywhere.
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.
- Location
- Charlwood (SO24)
- Wider area
- Hampshire
- Paperwork
- Written report with pictures
- Price
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
How it works
Our technicians bring everything the work needs, from protective sheeting to tools and access equipment. You only need to give us clear access and switch off what needs to be off. On site, the work takes half a day to a full day per unit, with large plant planned over several shifts. Visits to a village like Charlwood are booked in advance, at a time that suits whoever runs the site.
- We agree a shutdown window that suits the building.
- We take before photos of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- We take after pictures and issue the certificate and report.
Before we arrive
- Agree a time when the area can be out of use
- Arrange a key holder or contact on site
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Get a fixed quote
Photos are the quickest way to a quote: the system from a couple of angles, plus any access panels or hatches. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
Advice
What AHU cleaning cannot fix
We won’t sell you work that doesn’t address the problem, so these are the things it won’t cover:
- Problems with the unit’s controls or sensors
- Leaking heating or cooling coils
- Ductwork downstream of the unit, which is a separate clean
If you are not sure, just ring 0345 646 2711 or use the quote form and we’ll give you a straight answer.
What we work on in Charlwood
- Heating and cooling coils
- Internal panels
- Filter sections
- Dampers and louvres
- Drain trays
- Supply and extract fans
Why it’s worth doing now in Charlwood
A light clean now is simpler than a heavy one later. Leave it for years and dirt bakes onto coils and casings, particularly where damp has made it stick. Out of sight is the usual reason a rural system goes too long without attention.
No two sites are the same, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all make a difference.
Why book with us
- Photo reports with every job
- Fixed quotes, normally within one working day
- One number for every site across the South East and London
- Every job surveyed first
Places near Charlwood
Also in Charlwood
Charlwood buildings and their air
Charlwood is about 50 miles from central London, well within the area we cover across London and the South East. The visit is fixed around your opening hours, not ours. For Charlwood, the closest hospital is Alton Community Hospital, roughly 4.7 miles north-east. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
Around Charlwood, as anywhere, ventilation cleaning begins with an inspection.
Charlwood is about 6 miles south-west of Alton, in Hampshire. Wherever you are in the SO24 postcode area, we can take on AHU cleaning. 683 places in Hampshire are on our list, large and small. You can also see our page for Southampton, roughly 19 miles from Charlwood.
We work across the SO24 postcode area for AHU cleaning and the streets around it. If your site is just outside Charlwood, we cover Monkwood (1 mile south-west), Kitwood (1 mile north-west), Gilbert Street (1 mile north-west), Ropley (2 miles west) and West Tisted (2 miles south-west). Further out, we also cover Basingstoke (13 miles north), Winchester (12 miles west), Havant (15 miles south), Eastleigh (15 miles south-west), Horndean (12 miles south) and Alton (6 miles north-east).
Near you in Charlwood
Nearby you will also find Alton Community Hospital (4.7 miles north-east). Not far away are Red Hill and Shutts Copse.
What we are called out for in Charlwood
Whatever surrounds a building in Charlwood, the air drawn into its AHU carries dust, pollen and debris. Most of it lands at the intake and the first stage of filters, and some travels further into the unit.
Most sites get in touch when they notice something like this:
- Plant that needs cleaning after a refit
- Blocked condensate drains and slimy trays
- Air handling units with blocked filters
- Debris and leaves in the fresh air intake
If you run a surgery, dental practice or care home near Charlwood, clean ventilation matters as much to you as to a hospital like Alton Community Hospital (about 4.7 miles north-east).
Comparing quotes
- How VAT is shown on the quote
- When the next visit should be, and why
- If they look at the system before pricing
- Which accreditations they hold, and whether you can check them
Different parts, different methods
Heating and cooling coils
Coil fins are close together and catch the dust the filters miss. They’re cleaned using methods that will not bend or flatten the fins.
Rooftop and plant room units
Many AHUs sit on roofs or in plant rooms with limited access. We plan safe access as part of the survey so the quote reflects it.
Staff cleaning versus specialist work
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
Your own staff can handle the daily basics: wiping canopies, washing grease filters and recording it in a log. What they cannot safely do is clean inside the ductwork, the fan or the risers, and that is where we come in.
Looking after it afterwards
Aftercare is simple, and it makes the next visit easier:
- Flag stale or damp smells in the supply air
- File each AHU report in the maintenance log
- Make sure the unit’s access doors open easily
- Clear leaves and litter away from the intake
The report suggests a date for the next inspection or clean, taking into account how dirty it was. Under TR19® Air the timing is set by inspection and risk, not a fixed calendar.
Regular filter changes are the best protection an AHU has. Once filters clog, dirt starts getting past them.