Hampshire · Air handling unit cleaning
St Cross AHU cleaning
AHU cleaning across St Cross and nearby, timed so the site keeps working and finished with a written report and pictures.
- Units that have only ever had filter changes
- Debris and leaves in the fresh air intake
- Dirty filters cutting the airflow
AHU cleaning in St Cross, done properly
Think of an AHU clean as a full check-up for the ventilation. We look inside each section, clean what we find and record it with pictures, so the report shows exactly what was done. If you have drain trays holding standing water and dirty coils holding back the airflow, we can help.
In a place like St Cross, air handling units are often tucked into roof spaces or small plant rooms, out of sight and easy to overlook. Every unit, large or small, has filters, coils and a drain tray to keep clean.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we’re fully insured. On top of that, we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we have been trading since 2009.
- Location
- St Cross (SO22, SO23)
- Region
- Hampshire
- Paperwork
- Written report with photos
- Quote
- Fixed quote, usually within a working day
- When we work
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Honest limits
To be straight with you, some problems need a different fix:
- A system that’s undersized for the building
- Problems with the unit’s controls or sensors
- Leaking heating or cooling coils
Not sure which it is? You can give us a ring on 0345 646 2711 or use the quote form and we’ll tell you honestly.
Where we work
- Dampers and louvres
- Internal panels
- Drain trays
- Heating and cooling coils
- Supply and extract fans
- Filter sections
Common problems we fix in St Cross
Air handling units are typically tucked away on roofs, in plant rooms or above ceilings and are rarely seen by anyone but maintenance staff. Months can pass without anyone looking inside.
Common reasons sites call us include:
- Stale or musty smells from the ventilation
- Dust built up on fan impellers
- Plant that has been serviced but not cleaned
- Plant that needs cleaning after a refit
School buildings such as St Faith's Church of England Primary School are usually done in the holidays, so classrooms aren’t disturbed.
Questions to ask before booking
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Whether the quote is based on a survey or photos
- Proof of insurance
- Whether the whole system is included, or only the parts that are easy to reach
What happens on the day
We work around your opening hours, not the other way round. We book the visit for a time the area is closed, whether that’s an evening, overnight or a weekend. Once we’re in, the area is sheeted and anything that has to be off is turned off and cooled, and the work takes half a day to a full day per unit, with large plant planned over several shifts. In a smaller place like St Cross, parking is rarely the issue, but tell us about gates, roof access and opening hours.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- The unit is closed up and handed back, with a report to follow.
Before we arrive
- Let us know about parking and loading
- Find the previous report, if there is one
- Name a contact who can let us in at the agreed time
Getting a quote
The quickest way to a quote is to send photos: 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 we can price many jobs without a visit.
Related advice
How we price AHU cleaning
The diagnosis comes before the price. We look at:
- A single visit or a regular plan
- How many systems or sites are involved
- Site requirements such as sign-in and permits
- Whether we need access equipment or extra panels
Working hours, access and the scale of the site can all change the price. Each of those is built into the quote, and the price is fixed before work begins.
Helping us quote
When you call or email, it’s useful to have:
- Photos showing the whole system and its surroundings
- Any previous report or certificate
- The site address and the type of premises
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
To help us quote: where the site is, what it is and its opening hours, a few photos and the last certificate or report, if there is one. Once you have those, give us a ring on 0345 646 2711 or email us.
Different parts, different methods
Drain trays
Standing water in a tray sits right where the air passes. We clean it and note if the slope or the drain needs attention.
Fans and fan sections
The fan moves all of the unit’s air, so dirt on it gets spread around. We clean the impeller, housing and surrounding section.
Nearby places to St Cross
What else we do in St Cross
For landlords and multi-site operators
Multi-site operators often want one contractor and one number. We work across London and the South East, so visits at different addresses can be planned together and kept on a regular cycle.
For anyone managing more than one site, we can schedule visits across all of them on one quote. Every building has its own written report, so each one has its own record.
AHU cleaning around St Cross
Food Standards Agency data includes about 18 schools, colleges and universities, about 42 care, childcare and hospital premises and about 4 hotels, B&Bs and guest houses within about 1.5 miles of central St Cross. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. For St Cross, the closest hospital is Royal Hampshire County Hospital, roughly 0.9 miles north. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
Hospitals such as Royal Hampshire County Hospital (about 0.9 miles north) show how much a building can rely on clean ventilation, and smaller healthcare sites near St Cross are no different.
St Cross is about 1 mile south of Winchester, in Hampshire. Every kind of commercial site in St Cross, AHU cleaning is something we can help with. We can work out of hours so trading is not interrupted. Our area takes in 683 places across Hampshire, from busy centres to quieter spots. There’s also a page for Southampton, roughly 10 miles from St Cross.
Every address in SO22 and SO23 is covered for AHU cleaning, from busy streets to back roads. You’ll find streets such as Edgar Road, Hubert Road and Grange Road, and we cover them all for AHU cleaning. Nearby, we also carry out AHU cleaning in Badger Farm (1 mile west), Stanmore (1 mile north-west), Winchester (1 mile north), Bar End (1 mile east) and Highcliffe (1 mile north-east). Larger places within reach include Eastleigh (6 miles south), Fareham (15 miles south), Andover (13 miles north-west), Totton (12 miles south-west), Chandler's Ford (5 miles south-west) and Hedge End (9 miles south).
What’s near St Cross
In St Cross, that means kitchens and buildings near St. Cross Park, The Bell Inn Public House and Kings' School, among other places. The nearest railway station is Winchester station, roughly 1.3 miles north of the centre. A little further out are The Gurkha Museum (0.6 miles north-east) and Royal Hampshire County Hospital (0.9 miles north). For a walk, there’s Hockley Meadows and Twyford Down.
Questions from St Cross
Can you come to St Cross after we close?
Yes, nights and weekends are routine for us. Your customers, staff or residents in St Cross needn’t be disturbed. Let us know the hours you’re closed and we will book within them.
Can a school’s ventilation in St Cross be done out of term time?
Yes, holiday work suits schools best. With about 18 schools and colleges on the FSA’s register within roughly a mile and a half of St Cross, it pays to plan holiday dates ahead. Tell us your holiday dates and we’ll book the visit for when the site is empty.
What happens if you cannot reach some of it?
We record them on the report, with a note of where it is, and we explain what access is needed, for example new access panels.
Do you need to switch the unit off?
Yes. The unit has to be shut down and isolated before it’s opened. The shutdown is planned with whoever runs the building.
Is a quote from pictures possible?
Yes, for many jobs. Send a few wide pictures plus close-ups of panels, filters or grilles, and we usually come back within one working day. Some sites still need a visit, and we will say so.
Can you fix a faulty AHU?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We clean the unit and report anything we see that needs attention.
Do you offer maintenance contracts?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. Each report recommends when the next visit should be.
What does AHU cleaning cost?
The cost depends on the size of the system, its condition, access and timing. Call for a fixed quote and we’ll normally reply within one working day.
What staff can safely do
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, they should report it rather than try to fix it. We’ll take a look and send you a fixed quote.
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease call for the right kit, training and safe access. Leave those to us.