Surrey · Air handling unit cleaning
AHU Cleaning in North Holmwood
Air handling unit cleaning in North Holmwood, surveyed first and signed off with a written report and photos. Call for a fixed quote.
- Plant that has been serviced but not cleaned
- Air handling units due a clean after building work
- Dirty coils holding back the airflow
AHU cleaning in North Holmwood, done properly
We clean air handling units for buildings in North Holmwood and across Surrey, working to TR19® Air, in buildings such as offices, schools, healthcare sites and shops. The work is timed around when the system can be switched off, including evenings, nights and weekends. We’re often asked to deal with filters that are clogged or overdue and intake sections clogged with outdoor debris, on drain trays, filter sections and internal panels.
Smaller buildings around North Holmwood often keep their ventilation units in a roof void or plant cupboard, out of sight and easy to overlook. Filters, coils and drain trays need attention whatever the size of the unit.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Where
- North Holmwood (RH5, RH4)
- Region
- Surrey
- Reporting
- Report and photos after the visit
- Price
- A fixed price before we start
- Hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
What your team can do, and what needs us
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We can diagnose it and quote.
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’s our job.
Do you need AHU cleaning in North Holmwood?
Air handling units are normally tucked away on roofs, in plant rooms or above ceilings, so they’re easy to forget about. It’s easy for a long time to go by without anyone opening the panels.
Any of these means the system needs a check-up:
- Leaves and litter drawn into the unit
- Dust-coated heating and cooling coils
- Odours coming through the supply air
- Plant that has been serviced but not cleaned
Healthcare buildings such as Headley Court, about 5.9 miles north, depend on their ventilation; if you manage a surgery, clinic or care home near North Holmwood, yours matters too.
Before you book anyone
- Whether VAT is included
- Proof of accreditation you can verify
- If the quote is a fixed price or an estimate
- Whether they’re fully insured
What affects the cost of AHU cleaning
Sites vary more than people expect. What affects the quote:
- The scale of the work
- Travel, parking and unloading
- The condition we find in the survey
- How many systems or sites are involved
We do not list prices on the website, because the cost depends on the site in front of us. For a fixed quote, give us a ring on 0345 646 2711, or send details by email, and we will explain what it covers.
What we need to know
Photos and a few facts are often enough to price the work. Send what you can of the following:
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- The site address and the type of premises
- Detail shots of panels, filters and grilles
- When the site is open and when it’s quiet
Photos are the quickest way to a quote: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Add the site type and your opening hours, and we can price many jobs without a visit.
AHU cleaning in North Holmwood: local notes
Food Standards Agency records list about 7 caring premises (care homes, nurseries and hospitals) registered as food businesses in and around North Holmwood, up to about a mile and a half out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. At about 22 miles from central London, North Holmwood sits well inside the area we cover. We work evenings, overnight and at weekends, so the visit fits around the site. The nearest hospital to North Holmwood is Headley Court, about 5.9 miles north. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
If you manage a school such as St John's Church of England Primary School, ventilation cleaning is best booked for the holidays.
North Holmwood is about 1 mile south of Dorking, in Surrey. North Holmwood gets the same approach as every site we work on: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with photos. Across Surrey, we cover 395 places, and North Holmwood is one of them. We also work in Guildford, around 11 miles away.
Postcode districts we cover here for AHU cleaning: RH5 and RH4. We cover sites on Howard Road, Horsham Road and Inholms Lane and nearby roads. Nearby, we also carry out AHU cleaning in Blackbrook (1 mile south-east), Mid Holmwood (1 mile south-west), Dorking (1 mile north), Pixham (2 miles north) and Westcott (2 miles north-west). Further out, we also cover Guildford (11 miles west), Woking (13 miles north-west), Epsom (9 miles north), Horley (7 miles east), Redhill (7 miles east) and Ewell (10 miles north).
What’s near North Holmwood
Around North Holmwood, our work takes us to kitchens and buildings near Inholms Clay Pit, The Priory CofE Voluntary Aided School and Royal Oak pub and the streets around them. For rail, the closest station is Dorking West station, about 1.8 miles north-west of the centre. Well-known places in the area include Mesolithic Museum (3.7 miles west) and Headley Court (5.9 miles north). Not far away are Reigate Heath and Box Hill.
Why deal with it now?
Facilities teams are often asked for evidence that the ventilation is looked after. Our certificate and photo report give you clear evidence, for audits, tenants or your own peace of mind. Booking ahead lets us plan the trip to North Holmwood at a time that suits you.
The price reflects the work, not guesswork. That is why we survey first, from photos or on site, and why the quote is fixed before any work starts.
Why choose Duct Doctor in North Holmwood
- We diagnose before we treat
- A single point of contact for sites across the South East and London
- CHAS and SafeContractor accredited, with ISO 9001
- Fixed quotes, typically within one working day
North Holmwood: your questions answered
Is North Holmwood in your area for AHU cleaning?
Yes. We work across London and the South East, and North Holmwood is part of that. Just ring 0345 646 2711 or drop us a line with a few details of the site.
Can you get to a site in North Holmwood?
Yes, North Holmwood is part of our area, however small the site. Let us know about access, parking and anything unusual about getting there when you book.
Can you look after several sites?
Yes. One number covers all your sites across London and the South East, with visits on a regular schedule.
How much does AHU cleaning cost in North Holmwood?
The cost depends on the size of the system, its condition, access and timing. Ask us for a fixed quote and we will typically reply within one working day.
What happens to the waste?
We contain it and take it with us. Grease, debris and waste water are collected as the work goes on, so it does not spread.
Do you repair air handling units?
The clean includes noting faults, but repairs sit with your maintenance contractor, with photos where it helps.
How long does it take to clean an air handling unit?
Expect it to take one overnight shift for many single units, with bigger plant phased. Size, layout and how dirty it is decide the rest, and we’ll confirm the time when we quote.
Do you have a 24/7 line?
Yes, 24/7. Our office is open from 8am to 6pm on weekdays, with the emergency line covering every other hour.
Also near North Holmwood
Other services in North Holmwood
How it works
There’s very little for your team to do 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. For a place like North Holmwood, we load the van from the survey notes so the work can be done in one visit where possible.
- We look at the unit and the plant area during the survey.
- The area is protected and the unit made safe.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- The unit is closed up and handed back, with a report to follow.
Preparing for the visit
- Clear loose items from the work area
- Dig out any earlier paperwork for the system
- Mention any parking or loading restrictions
Ask for a quote
We don’t publish a price list, because every site is different. Instead, we look at your site first, from pictures or a survey, then send a fixed quote. To get going, phone us on 0345 646 2711 or send us an email.
Related advice
What the work involves, part by part
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. The impeller, its housing and the fan chamber are cleaned.
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. As part of the clean, filters are checked and cleaned or replaced as agreed, and clean the filter housing.
What AHU cleaning can’t fix
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It doesn’t solve:
- Coils that are corroded or leaking and need replacing
- Faulty motors, drives or bearings
- Building management system faults
If you are not sure, just call 0345 646 2711, or email photos and we will give you a straight answer.
What we work on in North Holmwood
- Heating and cooling coils
- Supply and extract fans
- Drain trays
- Dampers and louvres
- Filter sections
- Internal panels