Hampshire · Air handling unit cleaning
Knowle AHU cleaning
Professional AHU cleaning in and around Knowle, timed so the site keeps working and signed off in writing with pictures.
- Filters that are clogged or overdue
- Air handling units due a clean after building work
- Units that have only ever had filter changes
Between visits
Once we’ve finished, these simple steps help:
- Note any water around the unit or leaks below it
- Keep filter changes on time and recorded
- Keep inspection doors on the unit in good order
- Do not store bins or materials near the intake
If the ductwork hasn’t been cleaned, consider it next. Cleaning the unit and ducts together gives the best result, and we can quote for both.
Regular filter changes are the best protection an AHU has. Once filters clog, dirt starts getting past them.
AHU cleaning in Knowle, done properly
Heating and cooling coils trap dust that gets past the filters. Dirt on the fins holds back air and makes the unit work harder to do the same job. We clean coils with methods suited to their condition, taking care not to damage the fins. Typical jobs include blocked condensate drains and slimy trays and dirty fans and fan housings, across drain trays, heating and cooling coils and dampers and louvres.
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.
Insurers, fire officers and environmental health officers all look at records. So every job comes with a written report and photos, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Place
- Knowle (PO17)
- Wider area
- Hampshire
- Reporting
- Photo report after each visit
- Price
- Fixed quote, typically within a working day
- When we work
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Checked
- 30 October 2026
Nearby places to Knowle
More services for Knowle
Ventilation in Knowle buildings
The FSA’s food hygiene register lists about 4 schools, colleges and universities and about 8 hospitals, care homes and childcare premises with registered kitchens or food service within about 1.5 miles of central Knowle. Busy, occupied buildings like these are where clean supply air matters most. Knowle Hospital is the nearest hospital, about less than half a mile north-east of Knowle. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Wherever a school like Orchard Lea Infant School has ducted ventilation, a half-term visit keeps the work out of lesson time. Healthcare buildings such as Knowle Hospital, about under half a mile north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Knowle, yours matters too.
Knowle is about 2 miles north of Fareham, in Hampshire. From the centre of Knowle to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. Across Hampshire, we cover 683 places, and Knowle is one of them. Our Portsmouth page covers sites nearby, about 7 miles away.
All of PO17 is within our area for AHU cleaning, from busy streets to back roads. Whether your site is on Serotine Close, Boundary Walk and Park Approach or anywhere close by, we can help. Close by, we work in Funtley (1 mile south), Tapnage (1 mile north-west), Heathfield (2 miles south), Segensworth (2 miles west) and Titchfield Park (2 miles south-west). Larger places within reach include Winchester (13 miles north), Gosport (6 miles south-east), Havant (10 miles east), Eastleigh (9 miles north-west), Horndean (9 miles east) and Totton (13 miles west).
Around Knowle
Around Knowle, our work takes us to kitchens and buildings near The Miners Arms and The Henry Cort Community College. For rail, the closest station is Fareham station, roughly 2 miles south. Nearby you will also find Portchester Castle (4.9 miles south-east) and Knowle Hospital (under half a mile north-east). Not far away are Portsdown Hill and Swanwick Lakes.
What a clean won’t put right
In fairness, there are a few things this work won’t fix:
- The supply and extract ducts, quoted separately
- A system that’s undersized for the building
- Faulty motors, drives or bearings
Not sure which it is? You can phone us on 0345 646 2711 or email us and we’ll tell you honestly.
Where we work
- Dampers and louvres
- Supply and extract fans
- Drain trays
- Heating and cooling coils
- Internal panels
- Filter sections
What affects the cost of AHU cleaning
There’s no set price list, because sites vary so much. What we look at:
- The size of the system
- Site requirements such as sign-in and permits
- What state the system is in
- Whether several sites go on one quote
When the work has to happen, how we reach it and how big the site is can all change the price. We take each of them into account and give you a fixed price before work begins.
Helping us quote
What to send for a quote:
- Detail shots of panels, filters and grilles
- The roof, plant room or outside wall the system runs to
- Your opening hours and when the area is out of use
- Wide pictures of the system and the area around it
Quotes are quick. Send a few details and photos, and we usually reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.
What staff can safely do
For ventilation and air handling systems, in-house care is mostly about checks: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Day-to-day cleaning is something your team can do: 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, and that’s where we come in.
Different parts, different methods
Filters
What’s on the filters is a good clue to what’s further in. They’re photographed before and after for your records.
Heating and cooling coils
A dirty coil holds back the air and makes heating and cooling less effective. Cleaning restores the open path through the fins.
Landlords, agents and facilities managers
Keeping records across a portfolio is half the battle. Each visit produces a dated report with pictures, ready to show insurers, fire officers or EHOs.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we’re happy to quote for all of it.
How the visit works
The visit has three parts: set-up, the treatment itself and the sign-off. Set-up means sheeting and making equipment safe, and the sign-off is a written report with photos. Most of the time goes on the work itself, and that takes from a few hours for a compact unit to a day or more for a large one. A few pictures of the system help us make the most of a visit to a place like Knowle.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
Getting ready for the visit
- Allow time for equipment near the work to be turned off and cool down
- Tell us about site rules, permits or sign-in
- Tell us the best time to work, such as after service or at a weekend
Ask for a quote
For a fixed quote, phone us on 0345 646 2711 or email us and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. We typically come back within one working day.
Related advice
Knowle questions
Do you clean school ventilation in Knowle in the holidays?
Yes. The holidays are the usual time for school work. Around Knowle, the Food Standards Agency lists about 4 schools and colleges with registered kitchens within a mile and a half or so. Send us your term dates when you phone us on 0345 646 2711, or email photos, and we’ll fit the work in.
Can you work in Knowle outside opening hours?
Yes, nights and weekends are routine for us. It means the site in Knowle keeps running as normal. When you phone us on 0345 646 2711, or email photos, mention when the site is quiet.
Do you have a 24/7 line?
Yes. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line and we’ll talk you through the next steps.
Do you work in Knowle?
Yes. We work in Knowle and the rest of Hampshire, within our South East and London area. For a fixed quote, phone us on 0345 646 2711 or send us an email.
Can you fix a faulty AHU?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We will flag anything we notice during the clean.
Which kinds of sites do you work on?
Commercial premises of every kind: kitchens, offices, schools, healthcare, retail, leisure and food production. We fit the work around how the site operates.
Do you offer maintenance contracts?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. Each report recommends when the next visit should be.
Do you give a certificate after the clean?
Yes. You get a TR19® certificate plus before and after photos. Keep them in the maintenance log.