Surrey · Air handling unit cleaning
AHU Cleaning in Ranmore Common
One call covers air handling unit cleaning in Ranmore Common: survey, fixed quote, work and sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- Blocked condensate drains and slimy trays
- Odours coming through the supply air
- Air handling units due a clean after building work
How we handle AHU cleaning in Ranmore Common
Drain trays under cooling coils are meant to empty. If the outlet blocks, standing water and slime build up, 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 dirty coils holding back the airflow and rooms that smell stuffy when the system runs, on filter sections, drain trays and supply and extract fans.
In a village or hamlet like Ranmore Common, few buildings have mechanical ventilation, but where it’s fitted, it needs the same inspection and cleaning as anywhere.
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, with full insurance on top.
- Where
- Ranmore Common (RH5)
- Region
- Surrey
- Reporting
- Photo report after each visit
- Quote
- A fixed quote up front
- Working hours
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- Checked
- 30 October 2026
What happens on the day
Your staff do not need to do much on the day. A contact on site lets us in at the agreed time and points us to the system, and we take it from there. Afterwards, the area is left tidy and the written report follows. A few pictures of the system help us make the most of a visit to a place like Ranmore Common.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
Preparing for the visit
- Let us know how we reach the system, including roofs, risers and plant rooms
- Move anything stored near the system
- Tell us where we can park and unload
How to get a quote
Getting a quote doesn’t take long. Send a few details and pictures, 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.
Related advice
What affects the cost of AHU cleaning
You will get a fixed price before work begins. It’s based on:
- The number of sites or systems
- How easy every part is to reach
- Where the site is and how we reach it
- One-off work versus a regular cycle
What you pay depends on the size of the system, the condition it’s in and access to every part of it. We give you a fixed price before we start, so there are no surprises.
What we need to know
What to send for a quote:
- The times we could work without disrupting the site
- Any access panels or hatches you can see
- The postcode and the type of business
- Wide pictures of the system and the area around it
We do not publish a price list, because every site is different. We look at your system first, from pictures or on a visit, and then give you a fixed quote. To start, give us a ring on 0345 646 2711 or use the quote form.
Ranmore Common: your questions answered
Do you work overnight in Ranmore Common?
Yes, nights and weekends are routine for us. The work in Ranmore Common can fit around your hours. Just phone us on 0345 646 2711 or drop us a line with your opening times and we’ll plan around them.
Can you do AHU cleaning in Ranmore Common?
Yes, Ranmore Common is within the area we cover across London and the South East. To start, phone us on 0345 646 2711 or drop us a line with a few photos of the system.
Do you do ventilation duct cleaning too?
Yes, the ductwork, grilles and diffusers the unit serves. We will tell you after the survey whether the ducts need it.
What do you clean inside the unit?
We clean the filter section, heating and cooling coils, drain trays, fan and internal casing. What happens to the filters is agreed when we quote.
Can you price the work without visiting?
Often, yes. With good photos, the site type and your last report, we can price many jobs. Larger or hidden systems need a survey on site first.
What information do you need?
The site address, the type of premises and your opening hours, plus pictures of the system and your last certificate or report if you have one.
Do you have a 24/7 line?
Yes. There’s a 24/7 emergency line for anything that can’t wait until a planned visit. Ring any time and tell us what’s happened.
Can you set up regular visits?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, depending on what the system needs.
Ventilation in Ranmore Common buildings
For Ranmore Common, the closest hospital is Headley Court, roughly 5.1 miles north-east. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. At about 21 miles from central London, Ranmore Common sits well inside the area we cover. The visit is fixed around your opening hours, not ours.
Healthcare ventilation, from large hospitals like Headley Court (about 5.1 miles north-east) to small clinics, depends on clean filters, coils and ducts.
Ranmore Common is about 2 miles north-west of Dorking, in Surrey. Sites in Ranmore Common get the same service as everywhere we cover: a survey first, a fixed quote, work timed around your hours and a report with pictures. 395 places in Surrey are on our list, from busy centres to quieter spots. We also work in Guildford, about 9 miles from Ranmore Common.
All of RH5 is covered for AHU cleaning, from busy streets to back roads. Nearby, we also carry out AHU cleaning in Westcott (1 mile south), Westhumble (2 miles north-east), Dorking (2 miles south-east), Pixham (2 miles east) and Wotton (2 miles south-west). Within a short drive, we also cover Guildford (9 miles west), Woking (10 miles north-west), Epsom (8 miles north-east), Horley (10 miles south-east), Redhill (8 miles east) and Ewell (9 miles north-east).
Around Ranmore Common
In Ranmore Common, that means kitchens and buildings near Pippbrook House, The Priory CofE Voluntary Aided School and Milton Heath and The Nower and the streets around them. For rail, the closest station is Dorking West station, about 1.1 miles east of the centre. Nearby you’ll also find Betchworth Castle (3 miles east) and Mesolithic Museum (3.3 miles south-west). For a walk, there’s Box Hill and Combe Bottom.
Do you need AHU cleaning in Ranmore Common?
Cooling coils create condensation, and that water has to go somewhere. A blocked outlet or a badly sloped tray leaves standing water, and slime and smells soon follow.
Common reasons sites call us include:
- Coils clogged with dust and debris
- Units that have only ever had filter changes
- Air handling units due a clean after building work
- Condensate trays that won’t empty
If you manage a school such as Surrey Hills All Saints Primary School, ventilation cleaning is best booked for the holidays.
What your quote should include
- When the next visit should be, and why
- Whether the quote shows VAT
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- What’s included in the scope, part by part
Between visits
Simple habits between visits make a real difference. We recommend:
- Book the next check in line with the report
- Stick to the filter change plan
- Make sure the unit’s access doors open easily
- Flag stale or damp smells in the supply air
When we have closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Make the drain tray part of every maintenance visit. A drain that’s cleared early never gets to the slime stage.
Multi-site and managed buildings
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. With shared responsibility, good records help everyone.
If you look after several sites, we can schedule visits across all of them on one quote. Each site gets its own report and photos, so records stay tidy.
Why it’s worth doing now in Ranmore Common
A slimy drain tray only gets worse. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Dealing with it early keeps the clean straightforward. It’s worth booking a check, because nobody sees inside a duct day to day.
Working hours, access and the scale of the site can all change the price. We take each of them into account, and the price is fixed before any work starts.
Why choose Duct Doctor in Ranmore Common
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A written report with pictures after each visit
- A single point of contact for sites across the South East and London
- Accredited under CHAS and SafeContractor, with ISO 9001
How the job changes from site to site
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.
Drain trays
Standing water in a tray sits right where the air passes. We clean it and report anything about the tray or drain that needs fixing.