Greater London · Air handling unit cleaning
Coldblow AHU cleaning
We cover Coldblow for air handling unit cleaning. Out-of-hours visits, a fixed quote and a written report with photos as standard.
- Air handling units never cleaned inside
- Dirty fans and fan housings
- Air handling units due a clean after building work
When something else is needed
AHU cleaning cannot fix everything, and we will tell you before we start. It will not put right:
- A system that’s undersized for the building
- The supply and extract ducts, quoted separately
- Mechanical faults with motors, belts or bearings
If in doubt, call us on 0345 646 2711 or drop us a line and we’ll say what we think.
Parts of the system we cover
- Drain trays
- Heating and cooling coils
- Internal panels
- Filter sections
- Supply and extract fans
- Dampers and louvres
AHU cleaning in Coldblow, done properly
Heating and cooling coils trap dust that gets past the filters. A coated coil restricts airflow and makes the unit work harder. We clean coils with methods suited to their condition, taking care not to damage the fins. The work covers internal panels, drain trays and filter sections, and common reasons people get in touch are debris and leaves in the fresh air intake and coils clogged with dust and debris.
Many London buildings have had their ventilation extended and altered through several fit-outs, with old runs left behind that are hard to reach. An inspection first shows where cleaning is needed in a building in Coldblow.
Insurers, fire officers and environmental health officers all look at records. That is why every job is written up in a report with pictures, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Place
- Coldblow (DA5)
- Wider area
- Greater London
- Reporting
- Photo report after each visit
- Quotes
- A fixed quote up front
- Working hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
What the work involves, part by part
Filters
Filter condition tells you a lot about the rest of the unit. We photograph them for the report.
Drain trays
Older trays can corrode and start leaking. We record their condition with pictures so you can decide on any repairs.
Common questions in Coldblow
Can you work in Coldblow outside opening hours?
Yes, evening, overnight and weekend work is normal for us. The work in Coldblow can fit around your hours. Let us know the hours you’re closed and we’ll book within them.
What do you need to know about parking in Coldblow?
A loading bay, a visitor permit or off-street space near the site in Coldblow makes the visit easier to plan. Much of our London work is done overnight, which helps.
Can you quote from pictures?
Yes, if we can see what we need. Otherwise, we book a survey at a time that suits the site, then a fixed quote.
What does AHU cleaning cost?
There’s no set price, as it depends on the job: how big it is, what state it’s in, how we reach it and the working hours. We fix the price before we start.
Do you look at the system first?
Yes. We always survey first, either from photos and details you send or on a site visit. A fixed quote follows.
What information do you need?
Some pictures and a quick description of the system plus the address and your hours. If we need more, we’ll ask.
Will we get paperwork for the AHU clean?
Yes. Every clean comes with a TR19® certificate and a photo report. Keep them in the maintenance log.
Will you repair the fan or motor?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We’ll flag anything we notice during the clean.
Do you need AHU cleaning in Coldblow?
It matters for two reasons: the unit supplies the air people breathe, and a dirty unit has to work harder. For the people using the building every day, that’s the air they breathe for hours on end.
These are the problems we see most often:
- Plant that needs cleaning after a refit
- Air handling units with blocked filters
- Dust-coated heating and cooling coils
- Fan sections that haven’t been cleaned in years
Healthcare buildings such as Bexley Hospital, about 1.9 miles north-west, depend on their ventilation; if you manage a surgery, clinic or care home near Coldblow, yours matters too.
Before booking anyone
- Whether the price is fixed
- When the next visit should be, and why
- Whether a written report and pictures are included
- How VAT is shown on the quote
Nearby places to Coldblow
Other services in Coldblow
What staff can safely do
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, which is where we come in.
What affects the quote in Coldblow
Before we fix a price, we need to know a few things. We check:
- Parking and loading at the site
- Site rules, permits and inductions
- How many systems or sites are involved
- How easy every part is to reach
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all make a difference.
Asking for a quote
What to send for a quote:
- The times we could work without disrupting the site
- The postcode and the type of business
- How we’d reach plant on a roof or in a plant room
- Your last certificate, test record or report
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. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
The process
We turn up at the time agreed with you, often in the evening, overnight or at the weekend so the site keeps working. Equipment that has to be off is switched off and allowed to cool first, and the area around the work is covered and protected. On site, it takes one overnight shift for many single units, with bigger plant phased. Security desks and permits-to-work are routine in London, so let us know what your building in Coldblow needs from us.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- We take after photos and issue the certificate and report.
How to prepare
- Plan for cooking equipment or plant to be off before we arrive
- Name a contact who can let us in at the agreed time
- Let us know about parking and loading
Getting a quote
There’s no standard price list, because every site is different. Instead, we look at your site first, from photos or a survey, and then give you a fixed quote. To get going, ring 0345 646 2711 or send us an email.
Related advice
What AHU cleaning looks like in Coldblow
Going by the FSA’s register, there are about 17 schools, colleges and universities and about 24 care, childcare and hospital premises serving food within 1.5 miles or so of the middle of Coldblow. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Many London buildings have had their ductwork altered through several fit-outs, so an inspection comes first. Bexley Hospital is the nearest hospital, about 1.9 miles north-west of Coldblow. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
If you manage a school such as Maypole Primary School, ventilation cleaning is best booked for the holidays. If you run an office near Bexley station, its supply ductwork can gather dust for years before anyone looks inside.
Coldblow is about 3 miles east of Sidcup, in Greater London. Across the DA5 area, we can carry out AHU cleaning at your premises. Across Greater London, we cover 764 places, and Coldblow is one of them. Our London page covers sites nearby (12 miles or so).
Our technicians cover all of DA5 for AHU cleaning and the roads nearby. Local streets include St Mary's Road, Dartford Road and Wansunt Road, and we cover them all for AHU cleaning. If your site is just outside Coldblow, we cover Joyden's Wood (1 mile south-east), Bowmans (1 mile east), North Cray (1 mile south-west), Crayford (1 mile north-east) and Wilmington (1 mile south-east). We also work in nearby towns such as London (12 miles west), City of Westminster (15 miles west), Marylebone (14 miles north-west), St Pancras (14 miles north-west), Shoreditch (12 miles north-west) and Walthamstow (13 miles north-west).
Landmarks near Coldblow
We work in commercial kitchens and buildings around The Old Wick pub, St Columba's Catholic Boys' School and Braeburn Park, among other places. For rail, the closest station is Bexley station, about 0.6 miles west. Well-known places in the area include Stone Castle (5 miles east) and Bexley Museum (0.7 miles north). For a walk, there’s Wansunt Pit and Summer Hill.
Why it’s worth doing now in Coldblow
Standing water in a drain tray doesn’t clear itself. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Clearing it now is a much smaller job. In Coldblow, a planned overnight visit is much easier than closing unexpectedly.
We don’t list prices on the website, because each job is priced on what it involves. Call for a fixed quote, and we’ll talk you through it.
Why us?
- CHAS, SafeContractor and ISO 9001
- Fixed quotes, normally within one working day
- In business since 2009
- Evenings, overnight and weekends, plus 24/7 emergency callout