West Sussex · Air handling unit cleaning
Coates AHU cleaning
Our technicians work in Coates on AHU cleaning. Fixed quotes, work around your opening hours and photo reports as standard.
- Leaves and litter drawn into the unit
- Filters that are clogged or overdue
- Stale or musty smells from the ventilation
About our AHU cleaning in Coates
Our AHU cleaning covers sites in Coates and the rest of West Sussex, in buildings such as offices, schools, healthcare sites and shops. Units are cleaned when the site can spare them, often evenings, overnight or weekends. Common call-outs are for plant that needs cleaning after a refit and debris and leaves in the fresh air intake, on dampers and louvres, heating and cooling coils and drain trays.
Work in a small place like Coates starts with agreeing access and timings, and the ventilation is inspected, cleaned and recorded the same 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
- Coates (RH20)
- Region
- West Sussex
- Reporting
- Photo report after every visit
- Quotes
- Fixed quote, typically within a working day
- When we work
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
What we do, step by step
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. Somewhere as small as Coates, the date and timings are agreed with you well before the day.
- We start with a survey of the unit and a fixed quote for the work.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- Drain trays are cleared and cleaned and the outlet checked.
- A TR19® certificate and photo report follow the clean.
Before we arrive
- Tell us where we can park and unload
- Find the previous report, if there is one
- Make sure equipment near the work can be switched off and left to cool
Getting a quote
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.
Advice
When something else is needed
It’s worth knowing the limits before booking:
- Building management system faults
- A system that is undersized for the building
- Damaged coils beyond cleaning
Not sure which it is? You can phone us on 0345 646 2711, or send details by email and we’ll tell you honestly.
Parts of the system we cover
- Supply and extract fans
- Dampers and louvres
- Filter sections
- Drain trays
- Heating and cooling coils
- Internal panels
What happens if it’s left?
Leave an AHU uncleaned and the dirt doesn’t stay put. It’s carried through the ductwork and out of the grilles, which is why the unit and the ducts are best cleaned together. If the system at a site near Coates fails, there may be nowhere nearby to move to.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, which can make the next visit longer. If you are not sure what’s needed, call us on 0345 646 2711 or send us an email and we’ll give you an honest view and a fixed quote.
Why us?
- We are fully insured
- Ventilation hygiene specialists since 2009
- A fixed price before any work starts
- Every job surveyed first
Take a look at our cost guide and our accreditations and certificates.
Signs you need AHU cleaning in Coates
Air handling units are usually tucked away on roofs, in plant rooms or above ceilings, so they’re easy to forget about. It’s easy for a long time to go by without anyone opening the panels.
These are the problems we see most often:
- Intake sections clogged with outdoor debris
- Air handling units never cleaned inside
- Drain trays holding standing water
- Fan sections that haven’t been cleaned in years
Ventilation work in and around Coates is risk-based: inspect, then clean what needs it.
Questions to ask before you book
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- What records you’ll receive afterwards
- Whether the work can be done while the site is closed
- How they set the interval to the next visit
Different parts, different methods
Internal casing and panels
Access doors and panels are opened in turn and closed properly afterwards before the unit is handed back.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. We clean the intake and first stage of filters along with the rest.
Coates: your questions answered
Can you work in Coates outside opening hours?
Yes, nights and weekends are routine for us. The site is handed back ready to open. Just phone us on 0345 646 2711 or drop us a line with your opening times and we’ll plan around them.
Will you come out to Coates?
Yes, we work in villages as well as towns, and Coates is covered. Just mention lanes, gates or anything else about the site when you book.
Do you survey before quoting?
Yes. For many sites, photos and a few details are enough, and larger or hidden systems get a visit.
What’s 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.
What do you do with what you remove?
We contain it and take it with us. Grease, debris and waste water are collected as the work goes on, so it does not spread.
Can you quote from photos?
Typically, yes. Send wide shots, close-ups of any access panels and anything that worries you, and we typically come back within one working day. If pictures are not enough, we’ll survey first.
Do you work with multi-site operators?
Yes. Our area covers London and the South East, so sites at different addresses can be planned together as one programme. Every site has its own report.
What about areas you can’t get to?
The report shows them clearly. Often the fix is extra access, such as new panels in ductwork, and we can fit those.
What your team can do, and what needs us
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. That part needs specialist access and equipment.
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, which is where we come in.
What affects the cost of AHU cleaning
The diagnosis comes before the price. We look at:
- How big the system is
- What state the system is in
- Parking and loading at the site
- How many systems or sites are involved
The price reflects the work, not guesswork. That is why every job is surveyed first, and why the quote is fixed before any work starts.
What we need to know
To speed up the quote, send us:
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- The roof, plant room or outside wall the system runs to
- A few general shots of the system
- The times we could work without disrupting the site
Getting a quote doesn’t take long. Send a few details and photos, and we typically reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.
Towns and villages near Coates
What else we do in Coates
AHU cleaning in Coates: local notes
Coates, about 43 miles from central London, is within our usual area. Evening, overnight and weekend visits are all possible.
School buildings such as Fittleworth CofE Village School are typically done in the holidays, so classrooms aren’t disturbed.
Coates is about 10 miles north of Littlehampton, in West Sussex. If you need AHU cleaning in Coates, it’s easy to get a fixed quote: please call 0345 646 2711, or email photos. We work across South East England and London, including Coates. 371 places in West Sussex are on our list, from busy centres to quieter spots. You can also see our page for Guildford, roughly 20 miles from Coates.
Every address in RH20 is covered for AHU cleaning, from busy streets to back roads. We also cover the places around Coates: Lower Horncroft (1 mile east), Fittleworth (1 mile north-east), Bedham (1 mile north-east), Watersfield (2 miles south-east) and Coldwaltham (2 miles south-east). Further out, we also cover Horsham (14 miles north-east), Worthing (12 miles south-east), Bognor Regis (12 miles south-west), Chichester (12 miles south-west), Littlehampton (10 miles south) and Lancing (14 miles south-east).
Landmarks near Coates
In Coates, that means kitchens and buildings near The Swan Hotel, among other places. Coates’s nearest station is Pulborough station, roughly 2.7 miles east of the centre. Well-known places in the area include Coates Castle (0.5 miles south-west) and Coultershaw Heritage Site (2 miles north-west). Green spaces nearby include Bignor Hill and Amberley Wild Brooks.