West Sussex · Air handling unit cleaning
AHU Cleaning in Selham
AHU cleaning in Selham from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Blocked condensate drains and slimy trays
- Odours coming through the supply air
- Leaves and litter drawn into the unit
Multi-site and managed buildings
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We can quote either party, and the report can go to both.
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
AHU cleaning in Selham, done properly
Our AHU cleans for sites in Selham cover the parts that collect dirt: the filter section, heating and cooling coils, drain trays, fan and casing. You get a TR19® certificate and a photo report showing the unit before and after. The work covers heating and cooling coils, drain trays and internal panels, and common reasons people get in touch are air handling units never cleaned inside and debris and leaves in the fresh air intake.
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.
Every visit ends with a written report and pictures, 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.
- Where
- Selham (GU28)
- Region
- West Sussex
- Records
- Photo report after every visit
- Quotes
- A fixed price before work begins
- Working hours
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Leave it or put it right?
Leave an AHU uncleaned and the dirt does not stay put. It moves on into the ductwork and out into the rooms, so cleaning the ducts without the unit only goes so far. In a place like Selham, ductwork and fans are easy to forget until something goes wrong.
What you pay depends on how big the system is, what state it’s in and how easy it is to reach. We give you a fixed price before any work starts, so you know where you stand.
Why choose Duct Doctor in Selham
- Accredited under CHAS and SafeContractor, with ISO 9001
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Photo reports with every job
- Fully insured
Read what affects the cost or our accreditations and certificates.
Honest limits
We’d rather tell you now than book work that won’t help, so here are the limits:
- Mechanical faults with motors, belts or bearings
- Damaged coils beyond cleaning
- A system that is undersized for the building
Not sure which it is? You can call us on 0345 646 2711 or send us an email and we’ll tell you honestly.
Where we work
- Drain trays
- Heating and cooling coils
- Internal panels
- Supply and extract fans
- Dampers and louvres
- Filter sections
Part by part
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. The impeller, its housing and the fan chamber are cleaned.
The process
Your trading hours come first. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. Once we are 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. A quick note on how to find the site and where to park makes a visit to Selham run smoothly.
- We look at the unit and the plant area during the survey.
- 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.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Let us know about permits to work or site inductions
- Name a contact who can let us in at the agreed time
- Tell us where we can park and unload
Ask for a quote
Quotes are quick. Send a few details and pictures, and we normally reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
Advice
What AHU cleaning looks like in Selham
Selham’s nearest hospital, Midhurst Community Hospital, is about 2.9 miles west. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. Selham, about 44 miles from central London, is within our usual area. The visit is fixed around your opening hours, not ours.
Healthcare buildings such as Midhurst Community Hospital, about 2.9 miles west, depend on their ventilation; if you manage a surgery, clinic or care home near Selham, yours matters too. Ventilation work in and around Selham is risk-based: inspect, then clean what needs it.
Selham is about 8 miles south of Haslemere, in West Sussex. For AHU cleaning in and around Selham, please call us on 0345 646 2711, or send details by email for a fixed quote. We work across South East England and London, including Selham. Selham is one of 371 places in West Sussex we cover for AHU cleaning. Guildford is in our area too, about 19 miles from Selham.
Here we cover the GU28 postcode area for AHU cleaning. Neighbouring places we cover for AHU cleaning include South Ambersham (1 mile west), River (2 miles north), Tillington (2 miles north-east), Upperton (2 miles north-east) and Rotherbridge (2 miles east). Larger places within reach include Bognor Regis (13 miles south), Chichester (11 miles south-west), Littlehampton (13 miles south-east), Emsworth (14 miles south-west), Rustington (14 miles south-east) and Storrington (11 miles east).
Near you in Selham
A little further out are Midhurst Community Hospital (2.9 miles west) and Coultershaw Heritage Site (2.5 miles east). Green spaces nearby include Graffham Common.
What staff can safely do
Staff cleaning doesn’t replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but they do not reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
Selham questions
Can you work in Selham outside opening hours?
Yes. We work evenings, overnight and at weekends. It means the site in Selham keeps running as normal. Just phone us on 0345 646 2711 or drop us a line with your opening times and we’ll plan around them.
Do you cover smaller places like Selham?
Yes. Villages and rural sites across the South East are part of our work, Selham included. Just mention lanes, gates or anything else about the site when you book.
What accreditations do you have?
BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001. We have been trading since 2009 and we are fully insured.
Which parts of an air handling unit do you clean?
Every section that collects dirt: filters, coils, tray, fan and panels. The survey confirms what’s in your unit before we quote.
What about areas you can’t get to?
They’re marked on the report. Often the fix is extra access, such as new panels in ductwork, and we can fit those.
What do you need from me for a quote?
Only a few details: the address, the site type, your opening hours and how we reach the system. Photos and the last report help too. After that, simply ring 0345 646 2711 or drop us a line.
How long does it take to clean an air handling unit?
It takes one overnight shift for many single units, with bigger plant phased. The unit’s size and condition make the biggest difference, and we will confirm the time when we quote.
When should our AHU next be cleaned?
TR19® Air takes a risk-based approach, so it depends on inspection rather than a fixed interval. Each report suggests when the unit should next be looked at.
Between visits
No system stays clean for ever, but care slows the build-up. A few tips:
- File each AHU report in the maintenance log
- Note any water around the unit or leaks below it
- Report musty smells from the vents right away
- Clear leaves and litter away from the intake
When we’ve closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to make sure it stays clear.
Regular filter changes are the best protection an AHU has. Overloaded filters let more dirt through to the coils and fan.