West Sussex · Air handling unit cleaning
Highleigh AHU cleaning
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Highleigh, surveyed first and signed off with a written report and pictures. Call for a fixed quote.
- Intake sections clogged with outdoor debris
- Air handling units due a clean after building work
- Filters that are clogged or overdue
What a clean won’t put right
In fairness, there are a few things this work will not fix:
- Airflow problems caused by the system’s design
- The supply and extract ducts, quoted separately
- Building management system faults
If you’re not sure, just ring 0345 646 2711 or use the quote form and we’ll give you a straight answer before you book.
What the work covers
- Drain trays
- Supply and extract fans
- Heating and cooling coils
- Dampers and louvres
- Internal panels
- Filter sections
AHU cleaning in Highleigh
Units vary a lot in size, age and layout, from a small ceiling-mounted unit to a large rooftop plant. Every job starts with a survey, from photos or on site, followed by a fixed quote before any cleaning starts. We are often asked to deal with condensate trays that won’t empty and plant that needs cleaning after a refit, on internal panels, dampers and louvres and supply and extract fans.
In rural areas, ventilation units are often in roof voids or outbuildings, where filters and drain trays get forgotten.
For insurers and inspectors, the record counts. 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.
- Place
- Highleigh (PO20)
- Wider area
- West Sussex
- Reporting
- Written report with pictures
- Quote
- Fixed quote, normally within a working day
- Hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
What the work involves, part by part
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. They’re cleaned using methods that won’t bend or flatten the fins.
Internal casing and panels
Loose or damaged linings inside a unit can break up into the airstream. We note any we find in the report.
Between visits
After the visit, a few habits help the work last:
- Plan the next inspection before the last report gets filed away
- Change filters on schedule and log each change
- Report musty smells from the vents straight away
- Check the drain tray is emptying during routine visits
Keep filter changes on schedule between cleans, as that does more than anything to keep the unit clean. Record each change in the maintenance log.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
In-house cleaning or a specialist?
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.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, it’s best reported rather than tackled in-house. We will take a look and send you a fixed quote.
AHU cleaning around Highleigh
We cover Highleigh, about 59 miles from central London, as part of our work across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site. St Richard's Hospital is the nearest hospital, about 4.8 miles north of Highleigh. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Classrooms and halls at schools such as Sidlesham Primary School are easiest to work in when pupils are away. Hospitals such as St Richard's Hospital (about 4.8 miles north) show how much a building can rely on clean ventilation, and smaller healthcare sites near Highleigh are no different.
Highleigh is about 3 miles north of Selsey, in West Sussex. Across the PO20 area, we cover AHU cleaning for commercial sites. Highleigh is one of 371 places in West Sussex we cover for commercial clients. We also work in Portsmouth, around 12 miles away.
Our technicians cover all of PO20 for AHU cleaning and the streets around it. Local streets include Critchel's Lane, Highleigh Road and Green Lane, and we cover them all for AHU cleaning. If your site is just outside Highleigh, we cover Almodington (1 mile west), Birdham (2 miles north-west), Somerley (2 miles west), Earnley (2 miles west) and Shipton Green (3 miles north-west). We also work in nearby towns such as Bognor Regis (5 miles east), Chichester (4 miles north), Selsey (3 miles south), Littlehampton (12 miles east), Emsworth (8 miles north-west) and Rustington (13 miles east).
Near you in Highleigh
For rail, the closest station is Chichester station, about 3.9 miles north of the centre. Other landmarks nearby include Chichester Castle (4.5 miles north) and Selsey Lifeboat Museum (3.5 miles south). For a walk, there’s Pilsey Island.
Questions from Highleigh
Can ventilation in schools around Highleigh be cleaned out of term?
Yes, holiday work suits schools best. Around Highleigh, the Food Standards Agency lists about 2 schools and colleges with registered kitchens within a mile and a half or so. You can call us on 0345 646 2711 or send us an email with the dates the site is empty.
Do you work overnight in Highleigh?
Yes, evening, overnight and weekend work is normal for us. That way a site in Highleigh doesn’t have to lose a day’s trading. Just give us a ring on 0345 646 2711, or email photos with your opening times and we will plan around them.
How long will the unit be out of action?
Typically the clean takes half a day to a full day per unit, with large plant planned over several shifts. The shutdown is planned to fit, including evenings or weekends.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line, for problems that can’t wait. Ring any time and tell us what’s happened.
How often do AHUs need cleaning?
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.
Are you insured?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.
Do you survey before quoting?
Yes. For many sites, photos and a few details are enough, while bigger or harder-to-see systems are surveyed on site.
Do you give a certificate after the clean?
Yes, a TR19® certificate and a photo report. It includes a recommended date for the next check.
The process
We turn up 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 first, and the area around the work is covered and protected. On site, it takes a single shift for a typical unit, longer for large or heavily soiled ones. Rural roads and tight entrances are worth telling us about before a visit to Highleigh.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Drain trays are cleared and cleaned and the outlet checked.
- You get a TR19® certificate and a photo report.
Before we arrive
- Dig out any earlier paperwork for the system
- Tell us the best time to work, such as after service or at a weekend
- Let us know how we reach the system, including roofs, risers and plant rooms
Ask for a quote
If you need AHU cleaning in Highleigh, phone us on 0345 646 2711, or email photos. Let us know the site type and the opening hours, plus photos or the previous report if they’re to hand. A fixed quote normally follows within one working day.
Advice
Multi-site and managed buildings
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we will send a fixed quote.
Running several sites is easier with one contractor. We work across London and the South East, so visits at different addresses can be planned together and kept to a regular schedule.
Fixed quotes for AHU cleaning in Highleigh
The price is fixed before any work begins. It takes into account:
- The size of the system
- The condition we find in the survey
- Whether several sites go on one quote
- Where the site is and how we reach it
Combining work into one visit or one programme can make for a more efficient booking. Mention every system or site you need covered, and you’ll get one fixed quote.
What we need to know
When you contact us, it’s useful to have:
- Your opening hours and when the area is out of use
- The paperwork from the last visit, if you have it
- The postcode and the type of business
- Where the plant sits or the system leaves the building, such as a roof or outside wall
The quickest way to a quote is to send photos: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and many jobs can be priced from that alone.