Hampshire · Air handling unit cleaning
Air handling unit cleaning in Perham Down, Hampshire
Professional AHU cleaning in and around Perham Down, timed so the site keeps working and finished with a written report and photos.
- Plant that needs cleaning after a refit
- Air handling units never cleaned inside
- Air handling units with blocked filters
AHU cleaning in Perham Down, done properly
No two plant rooms are the same, from a small ceiling-mounted unit to a large rooftop plant. We look at the unit first, from pictures or a site visit, and send you a fixed quote before any cleaning starts. The work covers supply and extract fans, internal panels and dampers and louvres, and the jobs we see most are dust built up on fan impellers and air handling units due a clean after building work.
In rural areas, ventilation units are often in roof voids or outbuildings, which makes them easy to overlook.
We have been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Place
- Perham Down (SP11)
- Wider area
- Hampshire
- Paperwork
- Written report with photos
- Quote
- A fixed quote up front
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
AHU cleaning around Perham Down
Perham Down is on our map: we cover London and the South East. The visit is fixed around your opening hours, not ours.
An inspection comes first for any ventilation job around Perham Down, so the cleaning matches what’s there.
Perham Down is about 7 miles west of Andover, in Hampshire. Whether your site is in the middle of Perham Down or further out, we cover AHU cleaning for every kind of premises, from a single unit to a large public building. Perham Down is one of 683 places in Hampshire where we work for commercial clients. There’s also a page for Southampton, about 25 miles away.
Postcode districts we cover here for AHU cleaning: SP11. That includes premises on Perth Road, Somme Road and Upnor Close and the roads around them. We also cover the places around Perham Down: Great Shoddesden (1 mile east), Ludgershall (1 mile north), Tidworth (1 mile west), Kimpton (2 miles south-east) and Shipton Bellinger (3 miles south-west). Larger places within reach include Andover (7 miles east), Whitchurch (13 miles east), East Anton (7 miles east), Picket Piece (8 miles east), Picket Twenty (8 miles east) and Finkley Down (8 miles east).
Landmarks near Perham Down
For rail, the closest station is Grateley station, about 4.9 miles south of the centre. A little further out are Ludgershall Castle (1.3 miles north). Not far away are Quarley Hill.
Looking after it afterwards
Looking after the system between visits is straightforward, and it helps at the next visit:
- Check the drain tray is emptying during routine visits
- Watch for drips or damp patches near the plant
- Change filters on schedule and log each change
- Keep inspection doors on the unit in good order
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 confirm water is draining away.
Make sure access doors and panels on the unit open easily. Sections that are awkward to open are the ones that get skipped.
What we do, step by step
Before we leave, we walk the area with whoever is on site. Anything we couldn’t reach or that needs attention is pointed out there and then, and the same goes into the written report. The visit takes a single shift for a typical unit, longer for large or heavily soiled ones. Photos of the system and how to reach it help us plan a visit to Perham Down.
- We agree a shutdown window that suits the building.
- Before cleaning, each section is photographed.
- We work through the unit from the intake to the outlet.
- The fan and drain tray are cleaned and the drain checked.
- After photos are taken and the certificate issued.
Before we arrive
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Find the previous report, if there is one
- Arrange a key holder or contact on site
Ask for a quote
We don’t publish a price list, because every site is different. We look at your system first, from pictures or on a visit, then send a fixed quote. To get going, call 0345 646 2711, or send details by email.
Related advice
When to call us in Perham Down
An AHU’s intake draws in outdoor air and everything in it: dust, pollen, leaves and debris. The intake section and first filters take the brunt, and the finer material travels on.
These are the problems we see most often:
- Dirty fans and fan housings
- Air handling units with blocked filters
- Leaves and litter drawn into the unit
- Coils clogged with dust and debris
School buildings such as The Wellington Academy are usually done in the holidays, so classrooms are not disturbed.
What your quote should include
- Whether a survey comes first
- Whether they’re fully insured
- Whether the figure could change on the day
- What happens if part of the system cannot be accessed
Fixed quotes for AHU cleaning in Perham Down
Before we fix a price, we need to know a few things. We look at:
- Where the site is and how we reach it
- Whether it’s a one-off visit or part of a schedule
- When the work can happen, such as evenings, overnight or weekends
- How easy every part is to reach
Whatever the type of site, the quote works the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we will go through it with you.
Asking for a quote
Before you ask for a quote, gather:
- When the site is open and when it’s quiet
- Detail shots of panels, filters and grilles
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- The site address and the type of premises
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 we can price many jobs without a visit.
Part by part
Heating and cooling coils
Coil fins are close together and catch the dust the filters miss. They’re cleaned using methods that will not bend or flatten the fins.
Filters
Filters are the first line of defence in the unit. As part of the clean, filters are checked and cleaned or replaced as agreed, and clean the filter housing.
Towns and villages near Perham Down
What else we do in Perham Down
Perham Down questions
Is Perham Down within the area you cover?
Yes. Villages and rural sites across the South East are part of our work, Perham Down included. Just mention lanes, gates or anything else about the site when you book.
Can the work in Perham Down be done at night or at weekends?
Yes, we can come after you close and finish before you open. The work in Perham Down can fit around your hours. When you call us on 0345 646 2711 or drop us a line, mention when the site is quiet.
Do you look at the system first?
Yes. We always survey first, from your photos and details, or with a visit where needed. Then you get a fixed quote.
How long does it take to clean an air handling unit?
Expect it to take one overnight shift for many single units, with bigger plant phased. The unit’s size and condition make the biggest difference, and the quote will give you a clear idea.
Can you clean the ducts connected to the AHU?
Yes, supply and extract ducts, grilles and diffusers. We will tell you after the survey whether the ducts need it.
How often do AHUs need cleaning?
Under TR19® Air, cleaning is led by inspection and risk rather than a set calendar. Each report suggests when the unit should next be looked at.
What do you do to protect the area?
Protection goes down first: floor sheeting and covers over nearby surfaces and equipment. The area is left tidy, with our waste taken away.
What’s TR19?
It’s the industry benchmark for cleaning ventilation and kitchen extract systems, written by BESA. It covers how systems are inspected, cleaned and checked, and it takes a risk-based approach.
Multi-site and managed buildings
From a single site to a large estate, the standard is the same: diagnosis, a fixed price, work booked around your hours and a written report with photos.
If you look after several sites, we can plan visits across the whole estate and price them together. Each site gets its own report and pictures, so records stay tidy.
Why act early in Perham Down
A light clean now is simpler than a heavy one later. Leave it for years and dirt bakes onto coils and casings, especially where there’s been moisture. In a small place like Perham Down, a system that fails can take a site out of use.
A single site or a whole portfolio, the quote is built the same way: the work involved, the access and the timing. You’ll have a fixed price before any work starts.
Why us?
- One number for every site across the South East and London
- We diagnose before we treat
- A fixed price before any work starts
- We’re fully insured
Take a look at what affects the cost and our accreditations.