Surrey · Air handling unit cleaning
Air handling unit cleaning in Longcross, Surrey
AHU cleaning across Longcross and nearby, timed so the site keeps working and finished with a written report and photos.
- Air handling units due a clean after building work
- Debris and leaves in the fresh air intake
- Dust built up on fan impellers
Between visits
To keep the system working properly between visits:
- Report stiff or damaged access doors
- Change filters on schedule and log each change
- Keep the certificate and photo report with the plant records
- Clear leaves and litter away from the intake
The ducts served by the unit may need attention too. Cleaning the unit and ducts together gives the best result, and we can survey both.
Check drain trays and condensate drains during routine maintenance. A drain that is cleared early never gets to the slime stage.
AHU cleaning in Longcross
If the units serving a building in Longcross have only had filter changes for years, there may be dirt on the coils, fan and casing that nobody has looked at. A full clean deals with all of it. We are often asked to deal with odours coming through the supply air and fan sections that haven’t been cleaned in years, on internal panels, dampers and louvres and filter sections.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
For insurers and inspectors, the record counts. That’s why every job is written up in a report with pictures, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Location
- Longcross (KT16)
- Region
- Surrey
- Records
- Written report with pictures
- Quote
- Fixed quote, typically within a working day
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
Your questions about AHU cleaning in Longcross
Is Longcross in your area for AHU cleaning?
Yes. Our area runs across London and the South East, Longcross included. Just call 0345 646 2711 or email us with a few details of the site.
Do you cover smaller places like Longcross?
Yes. Villages and rural sites across the South East are part of our work, Longcross included. A survey first, from photos or a visit, means we arrive with the right kit.
What’s TR19?
It’s BESA’s specification and the benchmark insurers, fire officers and EHOs look to. It covers how systems are inspected, cleaned and checked and expects a risk-based approach.
Do you offer emergency callouts?
Yes, day and night, every day of the year. Our office is open from 8am to 6pm on weekdays, with the emergency line covering every other hour.
Do you survey before quoting?
Yes. Every job is surveyed first, from your pictures and details, or with a visit where needed. A fixed quote follows.
How far ahead should we book?
It depends on the time you need and how big the job is. Mention your preferred dates with your enquiry, and if it’s an emergency, call us any time.
Can you clean the ducts connected to the AHU?
Yes. Ductwork is cleaned through access panels, with anything inaccessible recorded, with new panels fitted where needed.
Are you accredited?
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 are fully insured.
For landlords and multi-site operators
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We can quote either party and send the paperwork to whoever needs it.
Keeping records across a portfolio is half the battle. Every visit ends with a dated report and photos, ready to show insurers, fire officers or EHOs.
Staff cleaning versus specialist work
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We’ll take a look and give you a fixed quote.
What else we do in Longcross
What affects the cost of AHU cleaning
Your quote is based on your site. We consider:
- Parking and loading at the site
- Any permits to work or inductions
- Whether several sites go on one quote
- The scale of the work
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, and a neglected system can mean more work. If you’re not sure what’s needed, call 0345 646 2711 or drop us a line for straight advice and a fixed quote.
Asking for a quote
When you contact us, it’s useful to have:
- Your opening hours and when the area is out of use
- Close-ups of filters, grilles, hatches or access panels
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Problems your staff have spotted
To help us quote: where the site is, what it is and its opening hours, pictures of the system and the last certificate or report, if there is one. Then give us a ring on 0345 646 2711 or use the quote form.
When something else is needed
A few issues sit outside what this work can do:
- Leaking heating or cooling coils
- Faulty motors, drives or bearings
- Ductwork downstream of the unit, which is a separate clean
Not sure which it is? You can call 0345 646 2711, or send details by email and we will tell you honestly.
What the work covers
- Dampers and louvres
- Filter sections
- Heating and cooling coils
- Supply and extract fans
- Internal panels
- Drain trays
How it works
Our technicians bring everything the work needs, including protection sheets, the right tools and access kit. All we need from you is clear access and the right equipment switched off. On site, the work takes one overnight shift for many single units, with bigger plant phased. Rural roads and tight entrances are worth telling us about before a visit to Longcross.
- We look at the unit and the plant area during the survey.
- 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.
- The unit is closed up and handed back, with a report to follow.
Getting ready for the visit
- Let us know how we reach the system, including roofs, risers and plant rooms
- Let us know about permits to work or site inductions
- Let us know when the site is closed or quiet
Ask for a quote
We don’t publish a price list, because every site is different. We look at your system first, from photos or on a visit, then send a fixed quote. To start, ring 0345 646 2711 or drop us a line.
Advice
What AHU cleaning looks like in Longcross
About 23 miles out from central London, Longcross is part of the South East area we work across. Evening, overnight and weekend visits are all possible. St. Peter's Hospital is the nearest hospital, about 2.6 miles east of Longcross. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
Workplaces around Longcross station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts. Healthcare ventilation, from large hospitals like St. Peter's Hospital (about 2.6 miles east) to small clinics, depends on clean filters, coils and ducts.
Longcross is about 4 miles south-west of Egham, in Surrey. Across the KT16 area, we cover AHU cleaning for commercial sites. 395 places in Surrey are on our list, large and small. For sites nearby, see our Guildford page, about 9 miles away.
Here we cover the KT16 postcode area for AHU cleaning. Whether your site is on Longcross Road, Tanglewood Close and Albury Close or a nearby road, we can help. Close by, we work in Trumps Green (1 mile north-east), Stonehill (1 mile south-east), Lyne (2 miles east), Mimbridge (3 miles south) and Ottershaw (3 miles south-east). We also work in nearby towns such as Guildford (9 miles south), Woking (4 miles south), Camberley (7 miles south-west), Epsom (14 miles east), Farnham (15 miles south-west) and Ewell (14 miles east).
Near you in Longcross
Typical jobs here are in premises near Gracious Pond, among other places. Longcross’s nearest station is Longcross station, about 0.6 miles north-west. Other landmarks nearby include St. Peter's Hospital (2.6 miles east) and Chobham Museum (2.2 miles south). Not far away are Virginia Water Lake and St Ann's Hill.
Part by part
Internal casing and panels
Loose or damaged linings inside a unit can break up into the airstream. Anything like that is recorded with photos.
Drain trays
A tray that doesn’t drain becomes a pool of stagnant water in the airstream. We clean it and report anything about the tray or drain that needs fixing.