Surrey · Air handling unit cleaning
Air handling unit cleaning in Brewer Street, Surrey
AHU cleaning across Brewer Street and nearby, timed so the site keeps working and signed off in writing with photos.
- Air handling units due a clean after building work
- Condensate trays that will not empty
- Dirty filters cutting the airflow
Common questions in Brewer Street
Do you work overnight in Brewer Street?
Yes. We work evenings, overnight and at weekends. The work in Brewer Street can fit around your hours. Just call us on 0345 646 2711 or use the quote form with your opening times and we’ll plan around them.
Do you do school ventilation cleaning in Brewer Street in the summer holidays?
Yes, and it’s the easiest time to do it. Around Brewer Street, the Food Standards Agency lists about 4 schools and colleges with registered kitchens within a mile and a half or so. Just call us on 0345 646 2711 or email us with your term dates and we’ll plan around them.
Do you look at the system first?
Yes, always. Diagnosis comes before treatment: the survey tells us what the system needs and how to reach it, and the quote is based on that.
What do you do with what you remove?
We contain it and take it with us. Grease, debris and waste water are collected as the work goes on rather than letting it spread.
What’s TR19?
It’s the industry benchmark for cleaning ventilation and kitchen extract systems, written by BESA. It sets out inspection, cleaning and record keeping, and it takes a risk-based approach.
How long does an AHU clean take?
Typically the clean takes one overnight shift for many single units, with bigger plant phased. The shutdown is planned to fit, out of hours if needed.
Do you work with multi-site operators?
Yes. Send the list of sites and the work at each and you will get one fixed quote.
What accreditations do you have?
We hold CHAS, SafeContractor and ISO 9001, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
AHU cleaning in Brewer Street
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, right in the path of the air going into the building. Cleaning and clearing it is a key part of the job. We are often asked to deal with odours coming through the supply air and plant that needs cleaning after a refit, on dampers and louvres, supply and extract fans and internal panels.
For a building in or near Brewer Street, access is agreed in advance and the visit is planned around the journey, and the ventilation is inspected, cleaned and recorded the same as anywhere.
Insurers, fire officers and environmental health officers all look at records. So every job comes with a written report and pictures, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Where
- Brewer Street (RH1)
- Region
- Surrey
- Records
- Written report with pictures
- Quotes
- A fixed quote up front
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Aftercare tips
Results last longer with the right care. Here’s what we suggest:
- File each AHU report in the maintenance log
- Make sure the unit’s access doors open easily
- Make sure condensate is draining away
- Keep filter changes on time and recorded
Once the clean is done, we send a TR19® certificate and a report with before and after photos. Keep both with the building’s maintenance records.
Make the drain tray part of every maintenance visit. A drain that’s cleared early never gets to the slime stage.
What staff can safely do
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but they don’t reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. That’s our job.
Brewer Street buildings and their air
Food Standards Agency data includes about 4 schools, colleges and universities and about 4 care, childcare and hospital premises within about 1.5 miles of central Brewer Street. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Brewer Street is about 17 miles from central London, well within the area we cover across London and the South East. Visits are booked around your hours, evenings and weekends included. The nearest hospital to Brewer Street is Caterham Dene Hospital, about 2.2 miles north. Clean air matters most where people are unwell, and that is as true in a care home as in a hospital.
Healthcare ventilation, from large hospitals like Caterham Dene Hospital (about 2.2 miles north) to small clinics, depends on clean filters, coils and ducts. Classrooms and halls at schools such as Bletchingley Village Primary School are easiest to work in when pupils are away.
Brewer Street is about 2 miles south of Caterham, in Surrey. We provide AHU cleaning for businesses, landlords and public buildings in Brewer Street and the rest of Surrey. Across Surrey, we cover 395 places, and Brewer Street is one of them. We also work in London, around 17 miles away.
Work in RH1 follows the same survey, fixed quote and written report as everywhere else we cover. If you need AHU cleaning at premises on Whitehill Lane and Brewer Street or anywhere close by, our technicians can take on the work. Neighbouring places we cover for AHU cleaning include Nutfield (1 mile south-west), Chaldon (2 miles north), South Merstham (2 miles west), Merstham (2 miles north-west) and South Nutfield (2 miles south-west). Within a short drive, we also cover Epsom (9 miles north-west), Horley (6 miles south-west), Redhill (3 miles west), Ewell (10 miles north-west), Reigate (4 miles west) and Dorking (10 miles west).
Landmarks near Brewer Street
Around Brewer Street, our work takes us to kitchens and buildings near Merstham Park School, Oakhyrst Grange School and The Prince Albert Public House, among other places. The closest station to Brewer Street is Merstham station, about 2.2 miles west of the centre. Well-known places in the area include East Surrey Museum (2.2 miles north-east) and The Belfry (3.1 miles west). For a walk, there’s Mercers Lake and Bay Pond.
What happens if it’s left?
Dirty coils and fans make the unit strain to move the same air. The result is extra wear and a building that does not feel as comfortable, and a planned clean is far less disruptive than a breakdown. Rural sites can’t always move to another kitchen or room when something fails.
When the work has to happen, how we reach it and how big the site is all affect the cost. We take each of them into account and give you a fixed price before work begins.
Why Brewer Street businesses choose us
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A fixed price before any work starts
- Photo reports with every job
- Ventilation hygiene specialists since 2009
See how cleaning jobs are priced and how to check a contractor.
What AHU cleaning cannot fix
We will always give you a straight diagnosis, so here’s what this work can’t put right:
- Problems with the unit’s controls or sensors
- Breakdowns that need a mechanical engineer
- Dirty ducts beyond the unit itself
Not sure which it is? You can give us a ring on 0345 646 2711 or drop us a line and we’ll tell you honestly before you book.
What the work covers
- Drain trays
- Supply and extract fans
- Heating and cooling coils
- Internal panels
- Dampers and louvres
- Filter sections
What affects the cost of AHU cleaning
Every site gets its own quote. These are the things that affect it:
- Where the site is and how we reach it
- Access, including roofs, risers and ceiling voids
- The condition of the system
- Site rules, permits and inductions
No two sites are the same, so we price each one individually. Size, access, the condition of the system and when we can work all make a difference.
What to send for a quote
Photos let us diagnose from a distance. Try to include:
- Any symptoms, from odd noises to smells or leaks
- Close-ups of filters, grilles, hatches or access panels
- Where the site is and what kind of site it is
- When the site is open and when it’s quiet
Every quote begins with a look at the system, from your pictures and details or, where that is not enough, a survey on site. Then we send a fixed price, before work begins.
The process
The first job on site is protection: floors, worktops and anything near the work are covered. After that, the system is made safe and the work begins. The work on site takes half a day to a full day per unit, with large plant planned over several shifts, and the area is cleaned down before we leave. Seeing the system in pictures first means the trip to Brewer Street can be planned properly.
- We agree a shutdown window that suits the building.
- We take before pictures of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- After pictures are taken and the certificate issued.
Preparing for the visit
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Let us know about parking and loading
- Name a contact who can let us in at the agreed time
Getting a quote
There’s no standard price list, because no two systems are the same. We look at your system first, from photos or on a visit, then send a fixed quote. To get going, ring 0345 646 2711 or use the quote form.
Related advice
Part by part
Filters
What’s on the filters is a good clue to what’s further in. They’re photographed before and after for your records.
Fans and fan sections
Dust on a fan impeller adds weight and wear. Cleaning keeps it running as intended.