West Sussex · Air handling unit cleaning
Air handling unit cleaning in Hammerwood, West Sussex
We cover Hammerwood for cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Out-of-hours visits, a fixed quote and a written report with pictures as standard.
- Drain trays holding standing water
- Intake sections clogged with outdoor debris
- Units that have only ever had filter changes
How the visit works
On the day, we arrive at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool before we start, and the area around the work is covered and protected. The work itself takes anything from half a day for one small unit to several shifts for a plant room full of them. Pictures of the system and its access let us plan the work in Hammerwood before we set off.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Dirt and debris are removed from each section.
- 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 when the site is closed or quiet
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Allow time for equipment near the work to be turned off and cool down
Ask for a quote
Quotes are quick. Call or email with a few details and you will usually have a fixed price within one working day. If we need to see the system first, we book a survey around your hours.
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AHU cleaning in Hammerwood
Our AHU cleaning covers sites in Hammerwood and the rest of West Sussex, in offices, schools, hospitals, care homes and retail. Units are cleaned when the site can spare them, often evenings, overnight or weekends. Common call-outs are for filters that are clogged or overdue and dirty coils holding back the airflow, on internal panels, heating and cooling coils and dampers and louvres.
Work in a small place like Hammerwood starts with agreeing access and timings.
Accreditations are easy to claim and worth checking. We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Place
- Hammerwood (RH19)
- Wider area
- West Sussex
- Reporting
- Photo report after every visit
- Quotes
- A fixed price before any work starts
- Hours
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Your questions about AHU cleaning in Hammerwood
Can you do AHU cleaning in Hammerwood?
Yes, Hammerwood is within the area we cover across London and the South East. Just ring 0345 646 2711 or use the quote form with a few details of the site.
Can you work in Hammerwood outside opening hours?
Yes, we can come after you close and finish before you open. The work in Hammerwood can fit around your hours. Your opening times are the first thing we ask for.
How often should an air handling unit be cleaned?
That is set by inspection, in line with TR19® Air. A hard-working unit, or one serving a hospital or care home, may need cleaning more often.
Will you repair the fan or motor?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We will flag anything we notice during the clean.
Do you have insurance?
Yes. We are fully insured, and we can share the details when you need them.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line, for problems that cannot wait. Ring any time and tell us what’s happened.
What about areas you cannot get to?
They’re listed in the report, never skipped quietly. The report says which parts couldn’t be reached and why, along with a quote to put access in.
What is TR19?
TR19® is BESA’s specification for ventilation hygiene. Since 2019, TR19® Grease has been a standalone specification for grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
What staff can safely do
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Ventilation in Hammerwood buildings
Queen Victoria Hospital is the nearest hospital, about 1.9 miles west of Hammerwood. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. About 26 miles out from central London, Hammerwood is part of the South East area we work across. The visit is fixed around your opening hours, not ours.
If you manage a school such as Sackville School, ventilation cleaning is best booked for the holidays.
Hammerwood is about 3 miles east of East Grinstead, in West Sussex. Wherever you are in the RH19 postcode area, we cover AHU cleaning for commercial sites. Hammerwood is one of 371 places in West Sussex we cover for commercial clients. We also work in Brighton, about 22 miles from Hammerwood.
Postcode districts we cover here for AHU cleaning: RH19. If your site is just outside Hammerwood, we cover Ashurst Wood (2 miles south-west), Cowden (2 miles east), Dormansland (2 miles north-west), Dormans Park (2 miles west) and East Grinstead (3 miles west). Larger places within reach include Crawley (10 miles west), Haywards Heath (11 miles south-west), Burgess Hill (15 miles south-west), Broadfield (11 miles west), Bewbush (12 miles west) and Southgate (10 miles west).
Landmarks near Hammerwood
The closest station to Hammerwood is Dormans station, about 2.4 miles north-west of the centre. Nearby you will also find Bolebroke Castle (2.9 miles south-east) and East Grinstead Museum (2.4 miles south-west). The countryside around Hammerwood includes Hedgecourt Lake.
What AHU cleaning cannot fix
We will not sell you work that does not address the problem, so these are the things it will not cover:
- Ductwork downstream of the unit, which is a separate clean
- Leaking heating or cooling coils
- Mechanical faults with motors, belts or bearings
Not sure which it is? You can call us on 0345 646 2711 or email us and we’ll tell you honestly.
What we work on in Hammerwood
- Internal panels
- Drain trays
- Heating and cooling coils
- Dampers and louvres
- Supply and extract fans
- Filter sections
What happens if it’s left?
Standing water in a drain tray does not clear itself. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Dealing with it early keeps the clean straightforward. If the system at a site near Hammerwood fails, there may be nowhere nearby to move to.
The cost depends on how big the system is, what state it’s in and how easy it is to reach. You get a fixed price before work begins, so there are no surprises.
Why Hammerwood businesses choose us
- Out-of-hours work and a 24/7 emergency line
- Each visit written up, with photos
- In business since 2009
- Fixed quotes, normally within one working day
Take a look at our cost guide and our accreditations and certificates.
What affects the quote in Hammerwood
You’ll get a fixed price before work begins. It takes into account:
- Site requirements such as sign-in and permits
- The times the site is available
- Whether it’s a one-off visit or part of a schedule
- The size of the system
One small site or a whole estate, we price it on the same basis: the work involved, the access and the timing. The price is fixed before we start.
Asking for a quote
A few details help us quote accurately. With your enquiry, please include:
- Photos showing the whole system and its surroundings
- Close-ups of filters, grilles, hatches or access panels
- Any previous report or certificate
- The postcode and the type of business
To help us quote: where the site is, what it is and its opening hours, a few pictures and the last certificate or report, if there is one. Once you have those, ring 0345 646 2711 or email us.
Between visits
Think of this as the after-treatment advice, in brief:
- Check the drain tray is emptying during routine visits
- Flag stale or damp smells in the supply air
- Do not store bins or materials near the intake
- Store the TR19 paperwork where auditors can find it
Restart the unit with your site team or maintenance contractor once we have finished. Check the drain tray is emptying over the first few days to make sure it stays clear.
Make the drain tray part of every maintenance visit. A drain that is cleared early never gets to the slime stage.
Nearby places to Hammerwood
What else we do in Hammerwood
Common problems we fix in Hammerwood
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray does not fall properly, water stands in it, and that’s where slime and odours start.
Keep an eye out for any of the following:
- Rooms that smell stuffy when the system runs
- Air handling units due a clean after building work
- Fan sections that haven’t been cleaned in years
- Units that have only ever had filter changes
Healthcare ventilation, from large hospitals like Queen Victoria Hospital (about 1.9 miles west) to small clinics, depends on clean filters, coils and ducts.
Questions to ask before you book
- Whether they recommend a next date
- Whether they’re fully insured
- Exactly which parts of the system are covered
- Proof of accreditation you can verify