Surrey · Air handling unit cleaning
Alfold AHU cleaning
AHU cleaning for Alfold, from a team that has been trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Odours coming through the supply air
- Air handling units due a clean after building work
- Dirty filters cutting the airflow
Questions from Alfold
Can you clean school ventilation in Alfold during the holidays?
Yes, and it’s the easiest time to do it. The FSA’s register shows about 2 schools and colleges with food registrations within roughly a mile and a half of Alfold. You can phone us on 0345 646 2711 or send us an email with the dates the site is empty.
Do you work overnight in Alfold?
Yes, out-of-hours work is a big part of what we do. The site is handed back ready to open. Your opening times are the first thing we ask for.
Does the AHU have to be shut down for cleaning?
Yes. The unit has to be shut down and isolated before it’s opened. The shutdown is planned with whoever runs the building.
How do you keep the site clean during the work?
Protection goes down first: sheeting over floors, worktops and anything close to the work. We tidy up and take our waste away before we leave.
Do you offer maintenance contracts?
Yes. Plans on a 3, 6 or 12-monthly cycle are available, depending on what the system needs.
What does TR19 mean?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It is not law, but it’s the benchmark.
Is Alfold in your area?
Yes. Alfold is part of the area we cover, as part of our area across London and the South East.
What about areas you can’t get to?
We record them on the report, with pictures where possible, and we explain what access is needed, for example new access panels.
How we handle AHU cleaning in Alfold
The fan pushes every bit of air in the system, so dirt on the impeller and housing gets spread around. We clean the fan section along with the rest of the unit, with the unit switched off and made safe first. The work covers internal panels, drain trays and filter sections, and common reasons people get in touch are air handling units with blocked filters and air handling units never cleaned inside.
Somewhere as small as Alfold, ducted ventilation is usually limited to a school, a care home, a surgery or a converted business building, wherever there is one, but where it’s fitted, it needs the same inspection and cleaning as anywhere.
Every visit ends with a written report and photos, so there’s a dated record of the work. Kitchen extract cleaning to TR19® Grease is certificated through the BESCA Vent Hygiene Elite portal.
- Location
- Alfold (GU6)
- Region
- Surrey
- Reporting
- Photo report after each visit
- Price
- A fixed price before we start
- Working hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
When something else is needed
Before you book, it helps to know what’s not included:
- Building management system faults
- Dirty ducts beyond the unit itself
- Breakdowns that need a mechanical engineer
If in doubt, call 0345 646 2711, or send details by email and we’ll say what we think.
What we work on in Alfold
- Supply and extract fans
- Dampers and louvres
- Internal panels
- Filter sections
- Drain trays
- Heating and cooling coils
Staff cleaning versus specialist work
Keep a record of what your team does. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, alongside our reports.
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. That is our job.
Part by part
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.
Internal casing and panels
The inside walls and floor of the casing collect dust and debris. Each section is cleaned from the intake through to the outlet.
Towns and villages near Alfold
More services for Alfold
What we do, step by step
Everything the job needs comes with us, from protective sheeting to tools and access equipment. You only need to give us clear access and switch off what needs to be off. On site, the work takes anything from half a day for one small unit to several shifts for a plant room full of them. A few photos of the system help us make the most of a visit to a place like Alfold.
- 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.
- 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.
- We close up the unit and send the certificate and before and after pictures.
How to prepare
- Mention any locked doors, roof access or ceiling voids
- Make sure someone can let us in and lock up afterwards
- Dig out any earlier paperwork for the system
Getting a quote
There’s no standard price list, because no two systems are the same. We look at your system first, from pictures or on a visit, and then send you a fixed quote. To start, phone us on 0345 646 2711 or use the quote form.
Related advice
Aftercare tips
A little care between visits keeps the system in better shape. Our advice:
- Check the drain tray is emptying during routine visits
- File each AHU report in the maintenance log
- Keep inspection doors on the unit in good order
- Stick to the filter change plan
Restart the unit with your site team or maintenance contractor once we have finished. Check the drain tray is emptying over the first few days to confirm water is draining away.
Make sure access doors and panels on the unit open easily. If a section is hard to get into, it tends not to get checked.
Why it’s worth doing now in Alfold
Standing water in a drain tray does not clear itself. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Clearing it now is a much smaller job. Rural sites can’t always move to another kitchen or room when something fails.
The cost depends on the size of the system, what state it’s in and how easy it is to reach. You get a fixed price before we start, so there are no surprises.
What you get with us
- We are fully insured
- Ventilation hygiene specialists since 2009
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- One contact for all your sites in London and the South East
Read what affects the cost and our accreditations and certificates.
What AHU cleaning looks like in Alfold
Alfold, about 33 miles from central London, is within our usual area. Evening, overnight and weekend visits are all possible.
Ventilation work in and around Alfold is risk-based: inspect, then clean what needs it. For sites in and around Alfold, the units and the ductwork are both looked at.
Alfold is about 9 miles west of Horsham, in Surrey. We carry out AHU cleaning for businesses, landlords and public buildings in Alfold and the rest of Surrey. Our Surrey coverage runs to 395 places, and Alfold is one of them. For sites nearby, see our Guildford page, about 11 miles away.
Every address in GU6 is covered for AHU cleaning, from busy streets to back roads. You’ll find streets such as Chapel Field Close, Loxwood Road and Cypress Grove, all of which we cover for AHU cleaning. Other places close to Alfold include Alfold Bars (1 mile south), Loxwood (1 mile south), Ifold (2 miles south), Durfold Wood (3 miles west) and Plaistow (3 miles south-west). Further out, we also cover Guildford (11 miles north), Woking (15 miles north), Farnham (14 miles north-west), Dorking (12 miles north-east), Haslemere (9 miles west) and Cranleigh (3 miles north-east).
Near you in Alfold
Locally, jobs take us to businesses close to The Crown pub and Fir Tree Copse. For a walk, there’s Shillinglee Lake.
What affects the cost of AHU cleaning
The diagnosis comes before the price. The main factors are:
- The condition we find in the survey
- The times the site is available
- Whether several sites go on one quote
- Parking and loading at the site
One small site or a whole estate, we price it on the same basis: the work involved, the access and the timing. You’ll have a fixed price before any work starts.
Asking for a quote
To help us quote quickly, please include:
- The paperwork from the last visit, if you have it
- Close-ups of filters, grilles, hatches or access panels
- The site address and the type of premises
- Wide pictures of the system and the area around it
Want a quote for AHU cleaning? Please give us a ring on 0345 646 2711 or email us with a few details about the site. We’ll talk you through the work and give you a fixed quote before anything is booked.