Surrey · Air handling unit cleaning
AHU Cleaning in Friday Street
For cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Friday Street, one call is all it takes: survey, fixed quote, work and sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- Units that have only ever had filter changes
- Rooms that smell stuffy when the system runs
- Dirty filters cutting the airflow
AHU cleaning in Friday Street, done properly
An air handling unit is the heart of a building’s ventilation: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Anything that collects inside the unit can end up in the rooms it serves, which is why we clean the unit itself, not just the ducts. Common call-outs are for dirty fans and fan housings and condensate trays that won’t empty, across heating and cooling coils, drain trays and internal panels.
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.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we are fully insured. We are also a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, trading since 2009.
- Location
- Friday Street (RH5)
- Region
- Surrey
- Reporting
- Written report with photos
- Quotes
- A fixed price before we start
- Hours
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
FAQs for Friday Street
Will you come out to Friday Street?
Yes. Villages and rural sites across the South East are part of our work, Friday Street included. The journey is planned ahead, so a few details about the route help.
Do you work at weekends in Friday Street?
Yes. We work evenings, overnight and at weekends. The site is handed back ready to open. Your opening times are the first thing we ask for.
Are you accredited?
We hold CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
What’s TR19?
TR19® is BESA’s specification for ventilation hygiene. Since 2019, TR19® Grease has been a standalone specification for grease in kitchen extract systems, while TR19® Air covers other supply and extract ductwork.
How long does an AHU clean take?
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 we’ll confirm the time when we quote.
Can you price the work without visiting?
In many cases, yes. With good pictures, the site type and your last report, we can price many jobs. Larger or hidden systems need a survey on site first.
Can you clean the ducts connected to the AHU?
Yes, supply and extract ducts, grilles and diffusers. The survey shows whether the ducts need cleaning now.
Can you come out in an emergency?
Yes. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line and we will talk you through the next steps.
Fixed quotes for AHU cleaning in Friday Street
A fixed price needs a few facts first. We look at:
- Site rules, permits and inductions
- One-off work versus a regular cycle
- How many systems or sites are involved
- Working hours and out-of-hours timing
A single site or a whole portfolio, 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.
What to send for a quote
To speed up the quote, please include:
- How we’d reach plant on a roof or in a plant room
- The paperwork from the last visit, if you have it
- The postcode and the type of business
- Detail shots of panels, filters and grilles
Want a quote for AHU cleaning? Please phone us on 0345 646 2711, or send details by email and tell us about the site. We’ll explain what we’d do and send a fixed quote before anything is booked.
What happens on the day
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Anything that needs to be off for the work is switched off and left to cool first, and the area around the work is covered and protected. On site, it takes anything from half a day for one small unit to several shifts for a plant room full of them. A quick note on how to find the site and where to park makes a visit to Friday Street run smoothly.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
Preparing for the visit
- Make sure someone can let us in and lock up afterwards
- Move anything stored near the system
- Mention any parking or loading restrictions
How to get 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, and then give you a fixed quote. To start, phone us on 0345 646 2711 or use the quote form.
Read more
Signs you need AHU cleaning in Friday Street
Filters catch most of the dust, but not all of it. What gets through settles on coils, fans and the inside of the casing, building up layer by layer.
Clients usually contact us when they notice something like this:
- Dust-coated heating and cooling coils
- Stale or musty smells from the ventilation
- Plant that has been serviced but not cleaned
- Condensate trays that won’t empty
An inspection comes first for any ventilation job around Friday Street, so the cleaning matches what’s there.
Before you book anyone
- When they can work, and whether that is outside your opening hours
- What’s included in the scope, part by part
- Whether the quote shows VAT
- Whether the quote is based on a survey or photos
Towns and villages near Friday Street
What else we do in Friday Street
Ventilation in Friday Street buildings
Friday Street, about 24 miles from central London, is within our usual area. Visits are booked around your hours, evenings and weekends included.
Classrooms and halls at schools such as Belmont Prep School are easiest to work in when pupils are away.
Friday Street is about 3 miles south-west of Dorking, in Surrey. Sites in Friday Street get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with pictures. 395 places in Surrey are on our list, large and small. Our Guildford page covers sites nearby, about 9 miles away.
All of RH5 is within our area for AHU cleaning, from busy streets to back roads. We cover sites on Sheephouse Lane, Noons Corner Road and Abinger Common Road and nearby roads. We also cover the places around Friday Street: Abinger Bottom (1 mile south), Abinger Common (1 mile west), Coldharbour (2 miles south-east), Forest Green (3 miles south) and South Holmwood (3 miles east). Further out, we also cover Guildford (9 miles north-west), Woking (12 miles north-west), Epsom (11 miles north-east), Horley (9 miles east), Redhill (10 miles east) and Ewell (12 miles north-east).
Local landmarks in Friday Street
Locally, jobs take us to businesses close to Hurtwood House, The Stephan Langton Inn and Wotton and Abinger Commons. For rail, the closest station is Gomshall station, roughly 2.9 miles north-west of the centre. A little further out are Abinger Castle (1 mile west) and Mesolithic Museum (1 mile west). Not far away are Vann Lake and Combe Bottom.
Why act early in Friday Street
A light clean now is simpler than a heavy one later. Leave it for years and dirt bakes onto coils and casings, particularly where damp has made it stick. With notice, the visit to Friday Street can be fitted around your bookings and events.
Putting the work off seldom saves money. Problems in a system tend to grow, which can make the next visit longer. If you’re unsure, phone us on 0345 646 2711 or email us for straight advice and a fixed quote.
Why book with us
- Every job surveyed first
- In business since 2009
- One contact for all your sites in London and the South East
- Fully insured
Read how cleaning jobs are priced or our accreditations and certificates.
Keeping the system healthy
Think of this as the after-treatment advice, in brief:
- Report musty smells from the vents straight away
- Diary the inspection date recommended in the report
- Stick to the filter change plan
- Keep the area around the fresh air intake clear
If the ductwork hasn’t been cleaned, consider it next. Cleaning the unit and ducts together gives the best result, and we can survey both.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
Part by part
Internal casing and panels
The inside walls and floor of the casing collect dust and debris. We clean each section from intake to discharge.
Fans and fan sections
Dust on a fan impeller adds weight and wear. Cleaning keeps it running as intended.
What a clean won’t put right
We will always give you a straight diagnosis, so here’s what AHU cleaning will not do:
- Mechanical faults with motors, belts or bearings
- Damaged coils beyond cleaning
- Problems with the unit’s controls or sensors
If you’re not sure, just give us a ring on 0345 646 2711, or email photos and we’ll give you a straight answer.
What we work on in Friday Street
- Heating and cooling coils
- Supply and extract fans
- Drain trays
- Internal panels
- Filter sections
- Dampers and louvres