West Sussex · Air handling unit cleaning
Air handling unit cleaning in River, West Sussex
AHU cleaning across River and nearby, timed so the site keeps working and signed off in writing with pictures.
- Condensate trays that will not empty
- Dirty fans and fan housings
- Air handling units with blocked filters
Looking after it afterwards
Here’s the after-treatment advice, short and simple:
- Make sure the unit’s access doors open easily
- Stick to the filter change plan
- Don’t store bins or materials near the intake
- Keep the certificate and photo report with the plant records
We recommend when the unit should next be inspected or cleaned, taking into account how dirty it was. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
About our AHU cleaning in River
If the units serving a building in River have only had filter changes for years, the coils, fan and casing can be carrying far more dirt than anyone has seen. A full AHU clean takes in the whole unit. If you have air handling units never cleaned inside and intake sections clogged with outdoor debris, we can help.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, which makes them easy to overlook.
Duct Doctor has been trading since 2009, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Place
- River (GU28)
- Wider area
- West Sussex
- Records
- Photo report after every visit
- Quotes
- A fixed quote up front
- When we work
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What we do, step by step
A visit follows the same order every time: sheeting and protection first, make the system safe, do the work, tidy up and hand over the paperwork. The visit itself takes from a few hours for a compact unit to a day or more for a large one. For a village or hamlet like River, tell us about narrow lanes, gates and parking when you book.
- 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.
- 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
- Plan for cooking equipment or plant to be off before we arrive
- Clear loose items from the work area
- Mention any parking or loading restrictions
Get a fixed quote
Quoting starts with a diagnosis, from your pictures and details or, where that isn’t enough, a survey on site. After that, you get a fixed price for the work so you know the cost before any work starts.
Related advice
What staff can safely do
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, they should report it rather than try to fix it. We can diagnose it and quote.
Your own staff can handle the daily basics: wiping canopies, washing grease filters and recording it in a log. What they cannot safely do is clean inside the ductwork, the fan or the risers, which is where we come in.
Why deal with it now?
Dirt left in an air handling unit does not stay in the unit. It moves on into the ductwork and out into the rooms, which is why the unit and the ducts are best cleaned together. It’s simpler to plan the work at River now than to arrange it in a hurry later.
You won’t find a price list here, because the cost depends on the site in front of us. Call for a fixed quote, and we will explain what it covers.
Why choose Duct Doctor in River
- Ventilation hygiene specialists since 2009
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Fully insured
- One contact for all your sites in London and the South East
See how cleaning jobs are priced and how to check a contractor.
Managing agents and facilities teams in River
We also work for facilities teams across offices, schools and healthcare across West Sussex. Work can be phased by floor, building or site around the people who use them.
If you look after several sites, we can schedule visits across all of them on one quote. Every building has its own written report, so each one has its own record.
Your questions about AHU cleaning in River
Can you come to River after we close?
Yes, out-of-hours work is a big part of what we do. That way a site in River does not have to lose a day’s trading. When you call us on 0345 646 2711 or drop us a line, mention when the site is quiet.
Do you cover River for AHU cleaning?
Yes, River is within the area we cover across London and the South East. You can give us a ring on 0345 646 2711 or use the quote form and tell us what needs doing.
Where does the waste go?
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.
Do you look at the system first?
Yes. Every job is surveyed first, from your pictures and details, or with a visit where necessary. A fixed quote follows.
Do you need to switch the unit off?
Yes. The fan must be stopped and the unit isolated, so we plan it for a time that suits the building.
How do you keep the site clean during the work?
Floors and surfaces near the work are sheeted before any work starts, and anything we remove is contained. At the end, the area is cleaned down.
What should I send you?
Where the site is, what it is and when it’s open, plus pictures of the system and your last certificate or report if you have one.
Are you accredited?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
Nearby places to River
More services for River
Honest limits
Before you book, it helps to know what’s not included:
- Airflow problems caused by the system’s design
- Faulty motors, drives or bearings
- Building management system faults
If in doubt, phone us on 0345 646 2711, or email photos and we’ll say what we think before booking.
Parts of the system we cover
- Heating and cooling coils
- Filter sections
- Internal panels
- Drain trays
- Dampers and louvres
- Supply and extract fans
River buildings and their air
Midhurst Community Hospital is the nearest hospital, about 3.2 miles west of River. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. River, about 42 miles from central London, is within our usual area. The visit is fixed around your opening hours, not ours.
Midhurst Community Hospital, about 3.2 miles west, is the nearest hospital to River, and healthcare sites of every size need their supply air kept clean. An inspection comes first for any ventilation job around River, so the cleaning matches what’s there.
River is about 12 miles east of Petersfield, in West Sussex. From the centre of River to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. River is one of 371 places in West Sussex where we work for AHU cleaning. You can also see our page for Guildford, about 17 miles away.
AHU cleaning in GU28 is surveyed, quoted and booked the same way as anywhere else. If your site is just outside River, we cover Upperton (1 mile east), Selham (2 miles south), Tillington (2 miles south-east), South Ambersham (2 miles south-west) and Hampers Green (2 miles east). We also work in nearby towns such as Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (14 miles south-east), Rustington (15 miles south-east), Storrington (11 miles south-east) and Billingshurst (9 miles east).
Landmarks near River
In River, that means kitchens and buildings near The Hollist Arms Public House. Other landmarks nearby include Lodsworth Castle (1.3 miles south) and Coultershaw Heritage Site (3 miles south-east). Open spaces near River include Graffham Common and Blackdown.
Fixed quotes for AHU cleaning in River
We do not publish a price list, because no two systems are the same. What we look at:
- Whether several sites go on one quote
- The condition we find in the survey
- Site requirements such as sign-in and permits
- Whether we need access equipment or extra panels
Several systems or sites on one quote can make for a more efficient booking. Tell us about everything you’d like looked at, and you will get one fixed quote.
What we need to know
We can often survey from photos. The most useful are:
- Wide photos of the system and the area around it
- The postcode and the type of business
- Any previous report or certificate
- The times we could work without disrupting the site
Quotes are quick. Call or email with a few details and you will typically have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.