Kent · Air handling unit cleaning
How Green AHU cleaning
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for commercial sites in How Green and across Kent. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Units needing a clean before a new tenant or handover
- Dirty filters cutting the airflow
- Blocked condensate drains and slimy trays
AHU cleaning in How Green: local notes
Food Standards Agency data includes about 3 schools, colleges and universities in How Green and the streets around it, up to about 1.5 miles out. Busy, occupied buildings like these are where clean supply air matters most. How Green, about 23 miles from central London, is within our usual area. We work evenings, overnight and at weekends, so the visit fits around the site. For How Green, the closest hospital is Tandridge Priory, roughly 5.4 miles north-west. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Tandridge Priory, about 5.4 miles north-west, is the nearest hospital to How Green, and healthcare sites of every size need their supply air kept clean.
How Green is about 7 miles south-west of Sevenoaks, in Kent. We carry out AHU cleaning for commercial premises of every kind in How Green and the rest of Kent. How Green is one of 922 towns, villages and districts in Kent where we work for commercial clients. There’s also a page for Maidstone, roughly 19 miles from How Green.
AHU cleaning in TN8 is surveyed, quoted and booked the same way as anywhere else. Streets in the area include Hever Road and How Green Lane, all of which we cover for AHU cleaning. Close by, we work in Hever (1 mile south), Newtown (2 miles south), Markbeech (2 miles south), Chiddingstone Causeway (3 miles east) and Chiddingstone Hoath (3 miles south-east). Within a short drive, we also cover Sevenoaks (7 miles north-east), Royal Tunbridge Wells (8 miles south-east), Tonbridge (7 miles east), Swanley (14 miles north), Kings Hill (14 miles east) and Paddock Wood (12 miles east).
Landmarks near How Green
Typical jobs here are in premises near The Wheatsheaf Public House and Chiddingstone Castle Park and Gardens and the streets around them. The closest station to How Green is Hever station, about 1.3 miles south-west of the centre. Nearby you will also find Tandridge Priory (5.4 miles north-west) and Hever Castle (0.7 miles south).
AHU cleaning in How Green, done properly
Our AHU cleans for sites in How Green cover the parts that collect dirt: filters, coils, drain trays, fans and the internal panels. Every clean comes with a TR19® certificate and before and after photos in a report. The work covers drain trays, supply and extract fans and internal panels, and people most often call us about air handling units never cleaned inside and stale or musty smells from the ventilation.
In a village or hamlet like How Green, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
Think of the report as the system’s health record: a dated account with photos of everything we did. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal, ready for your insurer.
- Where
- How Green (TN8)
- Wider area
- Kent
- Records
- Report and pictures after the visit
- Quote
- A fixed quote up front
- Hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Multi-site and managed buildings
Whether it’s one building or many, the standard is the same: a survey first, a fixed quote, the work timed around the site and a report with pictures.
Facilities teams in offices, schools and healthcare sites book us too in How Green and across Kent. Larger estates can be phased building by building around the people who use them.
What a clean will not put right
In fairness, there are a few things this work will not fix:
- Ductwork downstream of the unit, which is a separate clean
- Problems with the unit’s controls or sensors
- Leaking heating or cooling coils
If you’re not sure, just call us on 0345 646 2711 or drop us a line and we will give you a straight answer before you book.
What we work on in How Green
- Filter sections
- Internal panels
- Dampers and louvres
- Supply and extract fans
- Drain trays
- Heating and cooling coils
Nearby places to How Green
What else we do in How Green
Different parts, different methods
Drain trays
The drain tray collects water from the cooling coil. We clear standing water, clean out slime and check the outlet is draining.
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. We check them, and clean or change them as agreed in the quote, and the housing around them is cleaned too.
FAQs for How Green
Do you work in villages like How Green?
Yes, smaller places are covered as well as towns. Just mention lanes, gates or anything else about the site when you book.
Do you work overnight in How Green?
Yes, nights and weekends are routine for us. The work in How Green can fit around your hours. Tell us your opening hours when you ask for a quote.
How long will the unit be out of action?
Expect it to take a single shift for a typical unit, longer for large or heavily soiled ones. Size, layout and how dirty it is decide the rest, and the quote will give you a clear idea.
What do you clean inside the unit?
The main parts are the filters, coils, drain tray, fan and inside of the casing. We confirm the scope after looking at the unit.
What should I send you?
Just the basics: the address, the site type, your opening hours and how we reach the system. Photos and the last report help too. After that, simply phone us on 0345 646 2711, or email photos.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line, for problems that can’t wait. Call us any time and explain what’s happened.
What happens to the waste?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on rather than letting it spread.
Can you quote from pictures?
Yes, where the pictures show enough. Otherwise, we book a survey at a time that suits the site, and the quote follows that.
Staff cleaning versus specialist work
Staff cleaning does not replace a specialist visit; it supports it. Regular in-house cleaning slows 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, and that’s where we come in.
The process
On the day, we arrive at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool before work begins, 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. Somewhere like How Green, lanes, gates and parking are worth mentioning in advance.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- We arrange the shutdown with your staff and sheet the area.
- Filters, coils, fan section and casing are cleaned in turn.
- We clean out the drain tray and make sure it drains.
- A TR19® certificate and photo report follow the clean.
Getting ready for the visit
- Find the previous report, if there is one
- Let us know about parking and loading
- Let us know how we reach the system, including roofs, risers and plant rooms
Ask for a quote
For AHU cleaning in How Green, phone us on 0345 646 2711 or send us an email. Let us know the site type and the opening hours, and send pictures or your last report if you can. A fixed quote typically follows within one working day.
Related advice
When to call us in How Green
Air handling units are typically 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.
The symptoms we’re asked about most are:
- Air handling units due a clean after building work
- Dirty coils holding back the airflow
- Rooms that smell stuffy when the system runs
- Intake sections clogged with outdoor debris
Wherever a school like Hever Church of England Voluntary Aided Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time.
Comparing quotes
- If the quote is a fixed price or an estimate
- Exactly which parts of the system are covered
- If they look at the system before pricing
- Whether inaccessible sections are listed on the report
Leave it or put it right?
Stuffy rooms and stale smells in a building in How Green can sometimes be traced back to the AHU. A clean tackles the source instead of masking it. Our emergency line runs 24/7, but a planned visit to How Green is calmer for everyone.
One small site or a whole estate, the quote is built the same way: what needs doing, how we get to it and when. The price is fixed before we start.
Why How Green businesses choose us
- Full insurance on every job
- Fixed quotes from a survey or pictures
- We diagnose before we treat
- CHAS, SafeContractor and ISO 9001