Buckinghamshire · Air handling unit cleaning
AHU Cleaning in Long Crendon
We cover Long Crendon for air handling unit cleaning. Out-of-hours visits, a fixed quote and a written report with photos as standard.
- Blocked condensate drains and slimy trays
- Fan sections that haven’t been cleaned in years
- Odours coming through the supply air
How we handle AHU cleaning in Long Crendon
All the building’s air passes through the fan, so dirt on the impeller and housing gets spread around. We clean the fan section along with the rest of the unit, once the unit has been shut down and isolated. The work covers heating and cooling coils, dampers and louvres and filter sections, and the jobs we see most are fan sections that haven’t been cleaned in years and odours coming through the supply air.
Smaller buildings around Long Crendon often keep their ventilation units in a roof void or plant cupboard, out of sight and easy to overlook. Filters, coils and drain trays need attention whatever the size of the unit.
A written report with photos follows every visit, so you have a record of what was done and when. Kitchen extract cleaning to TR19® Grease is certificated through the BESCA Vent Hygiene Elite portal.
- Location
- Long Crendon (HP18)
- Region
- Buckinghamshire
- Reporting
- Photo report after each visit
- Quotes
- A fixed price before we start
- Working hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Updated
- 30 October 2026
Long Crendon: your questions answered
Can the work in Long Crendon be done at night or at weekends?
Yes, out-of-hours work is a big part of what we do. The site is handed back ready to open. Your opening times are the first thing we ask for.
Is Long Crendon within the area you cover?
Yes. Villages and rural sites across the South East are part of our work, Long Crendon included. Photos of the system and directions to the site help us plan the visit.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before work begins, and waste is contained as we go. At the end, the area is cleaned down.
Is a quote from pictures possible?
In many cases, yes. With good photos, the site type and your last report, we can price many jobs. Where we can’t see enough, we arrange a survey.
What happens to the waste?
We take it away at the end of the visit. While we work, it’s kept contained so the area stays clean.
Are you insured?
Yes. Duct Doctor is fully insured, and the details are available on request.
What accreditations do you have?
Duct Doctor is 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.
Which sectors do you work in?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, plus food production and leisure sites.
When something else is needed
An honest diagnosis matters more to us than a booking, so here’s what this work cannot put right:
- Damaged coils beyond cleaning
- Faulty motors, drives or bearings
- The supply and extract ducts, quoted separately
If in doubt, give us a ring on 0345 646 2711 or drop us a line and we will say what we think before booking.
What the work covers
- Internal panels
- Filter sections
- Dampers and louvres
- Heating and cooling coils
- Supply and extract fans
- Drain trays
What else we do in Long Crendon
Looking after it afterwards
How long the results last depends on use and care. We suggest:
- Keep filter changes on time and recorded
- Do not ignore odours coming through the grilles
- File each AHU report in the maintenance log
- Diary the inspection date recommended in the report
Restart the unit with your site team or maintenance contractor once we have finished. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Keep the area around the intake clear. What’s near the intake ends up in the unit.
AHU cleaning around Long Crendon
Long Crendon, about 43 miles from central London, is within our usual area. A survey and a fixed quote come first, then the visit at a time that suits you. The nearest hospital to Long Crendon is Thame Community Hospital, about 2.4 miles south-east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Hospitals such as Thame Community Hospital (about 2.4 miles south-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Long Crendon are no different. School buildings such as Long Crendon School are normally done in the holidays, so classrooms are not disturbed.
Long Crendon is about 2 miles north-west of Thame, in Buckinghamshire. Whatever kind of site you run in Long Crendon, AHU cleaning is something we can help with. We can work out of hours so trading is not interrupted. Long Crendon is one of 263 places in Buckinghamshire where we work for AHU cleaning. Oxford is in our area too, about 10 miles from Long Crendon.
Work in HP18 follows the same survey, fixed quote and written report as everywhere else we cover. That includes premises on High Street, The Square and Giffard Way and the roads around them. Neighbouring places we cover for AHU cleaning include Chearsley (2 miles north-east), Thame (2 miles south-east), Moreton (3 miles south), Haddenham (3 miles east) and Cuddington (3 miles north-east). We also work in nearby towns such as Aylesbury (8 miles east), High Wycombe (15 miles south-east), Buckingham (15 miles north), Elmhurst (9 miles north-east), Southcourt (8 miles east) and Princes Risborough (8 miles south-east).
What’s near Long Crendon
We work in commercial kitchens and buildings around Lord Williams's School and The Eight Bells Public House, among other places. Long Crendon’s nearest station is Haddenham & Thame Parkway station, roughly 2.3 miles east of the centre. A little further out are Dinton Castle (4.7 miles east) and Thame Community Hospital (2.4 miles south-east). The countryside around Long Crendon includes Snakemoor.
What the work involves, part by part
Drain trays
Older trays can corrode and start leaking. Their condition goes into the report with photos so repairs can be planned.
Internal casing and panels
Damaged internal linings or loose panels can shed material into the air. We note any we find in the report.
Landlords, agents and facilities managers
We also work for facilities teams across offices, schools and healthcare across Buckinghamshire. Work can be phased by floor, building or site around the people who use them.
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We are happy to deal with either side and send the paperwork to whoever needs it.
In-house cleaning or a specialist?
Logging matters as much as cleaning. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, next to our reports.
Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.
What affects the cost of AHU cleaning
Some jobs are bigger than they look, and some smaller. The main factors:
- How many systems or sites are involved
- Any permits to work or inductions
- Working hours and out-of-hours timing
- Access, including roofs, risers and ceiling voids
No two sites are the same, so we price each one individually. Size, access, the condition of the system and when we can work all play a part.
What to send for a quote
When you contact us, it’s useful to have:
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Any access panels or hatches you can see
- The paperwork from the last visit, if you have it
- Problems your staff have spotted
Want a quote for AHU cleaning? Please phone us on 0345 646 2711 or email us with a few details about the site. We’ll explain what we’d do and send a fixed quote before you commit to anything.
The process
Everything the job needs comes with us, from protective sheeting to tools and access equipment. You only need to give us clear access and switch off what needs to be off. The visit takes one overnight shift for many single units, with bigger plant phased. For a place like Long Crendon, we load the van from the survey notes so the work can be done in one visit where possible.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Plan for cooking equipment or plant to be off before we arrive
- Tell us where we can park and unload
- Clear the space around the work
How to get a quote
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, the quote is fixed before any work is booked.