Hampshire · Air handling unit cleaning
Liss AHU cleaning
AHU cleaning across Liss and nearby, booked around your opening hours and signed off in writing with pictures.
- Blocked condensate drains and slimy trays
- Dirty filters cutting the airflow
- Plant that has been serviced but not cleaned
About our AHU cleaning in Liss
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. Coils are cleaned carefully, with methods chosen so the fins aren’t flattened. The work covers drain trays, heating and cooling coils and supply and extract fans, and people most often call us about dirty fans and fan housings and filters that are clogged or overdue.
Around a place like Liss, ventilation systems tend to be in schools, surgeries, care homes and workplaces. Smaller systems still gather dust and need inspecting.
It’s worth checking any contractor’s accreditations. Ours are BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Where
- Liss (GU33)
- Region
- Hampshire
- Paperwork
- Report and photos after the visit
- Quote
- A fixed price before we start
- When we work
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
Part by part
Filters
Dirty filters cut airflow and let dirt slip past their frames. We clean the frames and rails so the filters sit tight.
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.
Towns and villages near Liss
Other services in Liss
What your team can do, and what needs us
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 is where we come in.
A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease call for the right kit, training and safe access. Leave those to us.
Ventilation in Liss buildings
Going by the FSA’s register, there are about 8 caring premises (care homes, nurseries and hospitals) serving food within 1.5 miles or so of the middle of Liss. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. At about 47 miles from central London, Liss sits well inside the area we cover. A survey and a fixed quote come first, then the visit at a time that suits you. Liss’s nearest hospital, Petersfield Community Hospital, is about 3.6 miles south-west. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
School buildings such as Liss Infant School are usually done in the holidays, so classrooms aren’t disturbed. Petersfield Community Hospital, about 3.6 miles south-west, is the nearest hospital to Liss, and healthcare sites of every size need their supply air kept clean. If you manage offices or shops near Liss station, their ventilation can be inspected and cleaned out of hours.
Liss is about 3 miles north-east of Petersfield, in Hampshire. Liss gets the same approach as every site we work on: a survey first, a fixed quote, work timed around your hours and a report with photos. 683 places in Hampshire are on our list, large and small. For sites nearby, see our Portsmouth page, about 18 miles away.
AHU cleaning in GU33 is surveyed, quoted and booked the same way as anywhere else. AHU cleaning is available to premises on Station Road, Shotterfield Terrace and Greenfields and the roads around them. Close by, we work in West Liss (1 mile south-west), The Mint (1 mile north-east), Liss Forest (1 mile north), Hill Brow (1 mile south-east) and Durford Wood (1 mile south). We also work in nearby towns such as Havant (13 miles south), Horndean (11 miles south-west), Aldershot (15 miles north), Alton (8 miles north-west), Waterlooville (13 miles south-west) and Petersfield (3 miles south-west).
Landmarks near Liss
In Liss, that means kitchens and buildings near Whistle Stop pub, among other places. Liss has its own railway station: Liss station. Well-known places in the area include Petersfield Community Hospital (3.6 miles south-west) and Bear Museum (3.5 miles south-west). The countryside around Liss includes Liss Riverside Railway Walk South and Wheatham Hill.
What we do, step by step
Our technicians bring everything the work needs, from protective sheeting to tools and access equipment. All we need from you is clear access and the right equipment switched off. The visit takes anything from half a day for one small unit to several shifts for a plant room full of them. Your opening hours decide when we come to Liss, not ours.
- We start with a survey of the unit and a fixed quote for the work.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- Drain trays are cleared and cleaned and the outlet checked.
- You get a TR19® certificate and a photo report.
Preparing for the visit
- Allow time for equipment near the work to be turned off and cool down
- Have your last certificate or report to hand
- Tell us the best time to work, such as after service or at a weekend
Get a fixed quote
For AHU cleaning in Liss, call 0345 646 2711 or send us an email. Let us know the site type and the opening hours, plus photos or the previous report if they’re to hand. A fixed quote typically follows within one working day.
Related advice
Liss questions
Can the work in Liss be done at night or at weekends?
Yes, nights and weekends are routine for us. Your customers, staff or residents in Liss needn’t be disturbed. Let us know the hours you’re closed and we’ll book within them.
Is Liss within the area you cover?
Yes, Liss is part of our area, however small the site. Let us know about access, parking and anything unusual about getting there when you book.
Are you fully insured?
Yes. We carry full insurance and have been trading since 2009.
How often do AHUs need cleaning?
TR19® Air takes a risk-based approach, so it depends on inspection rather than a fixed interval. We recommend a next date in each report.
Will you repair the fan or motor?
AHU cleaning is what we offer here, not mechanical repairs. Any faults we notice are recorded for your maintenance team to follow up.
Will we get paperwork for the AHU clean?
Yes. Every clean comes with a TR19® certificate and a photo report. Keep them in the maintenance log.
What about areas you cannot get to?
Anything we can’t reach goes on the report, with pictures where possible, and we tell you what would make it reachable, for example new access panels.
What does AHU cleaning cost?
There’s no set price, as it depends on the job: how big it is, what state it’s in, how we reach it and the working hours. You get a fixed price before we start.
How we price AHU cleaning
Every site gets its own quote. This is what makes a difference:
- The condition we find in the survey
- The scale of the work
- Whether we need access equipment or extra panels
- Travel, parking and unloading
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all make a difference.
Asking for a quote
Many jobs can be priced from pictures and some basics. Useful things to send:
- Where the site is and what kind of site it is
- The paperwork from the last visit, if you have it
- The roof, plant room or outside wall the system runs to
- Detail shots of panels, filters and grilles
To help us quote: the address, the type of site and when it’s open, a few pictures and any previous report or certificate. Once you have those, call 0345 646 2711, or send details by email.
Why deal with it now?
Dirty coils and fans make the unit strain to move the same air. That means more wear on the motor and rooms that feel less fresh, and a clean on your terms beats a breakdown on nobody’s. A quieter site near Liss still needs its system looked after.
What you pay depends on the size of the system, the condition it’s in and how easy it is to reach. We give you a fixed price before any work starts, so you know where you stand.
Why Liss businesses choose us
- Every visit written up, with pictures
- We diagnose before we treat
- Fixed quotes from a survey or photos
- One contact for all your sites in London and the South East
Take a look at our cost guide or our accreditations and certificates.
Between visits
Think of this as the after-treatment advice, short and simple:
- Store the TR19 paperwork where auditors can find it
- Report stiff or damaged access doors
- Clear leaves and litter away from the intake
- Change filters on schedule and log each change
Photos in the report cover the filters, coils, drain tray, fan and casing, and note any part we couldn’t get to. Any defects we noticed, like a leaking tray or damaged lining, are listed.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
When it’s something else
Some problems need a different service or another trade:
- Building management system faults
- Damaged coils beyond cleaning
- A system that is undersized for the building
Not sure which it is? You can call 0345 646 2711, or send details by email and we’ll tell you honestly.
What the work covers
- Internal panels
- Drain trays
- Supply and extract fans
- Dampers and louvres
- Heating and cooling coils
- Filter sections