Hertfordshire · Air handling unit cleaning
Boxmoor AHU cleaning
Need AHU cleaning in Boxmoor? We diagnose first, fix the price and book the work around your hours, finishing with a written report and pictures.
- Odours coming through the supply air
- Plant that has been serviced but not cleaned
- Air handling units due a clean after building work
How we handle AHU cleaning in Boxmoor
An AHU clean is a thorough examination and treatment of the unit. Every section is opened, cleaned and photographed, so you can see the unit’s condition for yourself. The work covers drain trays, internal panels and dampers and louvres, and people most often call us about blocked condensate drains and slimy trays and coils clogged with dust and debris.
Around a place like Boxmoor, ventilation systems tend to be in schools, surgeries, care homes and workplaces. Smaller systems still gather dust and need inspecting.
Good records are part of the job. Each visit is written up with pictures, covering the work done, any areas we couldn’t access and a recommended next date. File it in your maintenance log so it’s ready for an insurer, fire officer or EHO.
- Location
- Boxmoor (HP1, HP3, HP2)
- Region
- Hertfordshire
- Reporting
- Report and pictures after the visit
- Quotes
- A fixed quote up front
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
Managing agents and facilities teams in Boxmoor
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we are happy to quote for all of it.
Whether it’s one building or many, you get the same standard: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
Nearby places to Boxmoor
What else we do in Boxmoor
Ventilation in Boxmoor buildings
Food Standards Agency records list about 20 schools, colleges and universities, about 26 caring premises (care homes, nurseries and hospitals) and about 3 hotels and B&Bs registered as food businesses within roughly a mile and a half of the centre of Boxmoor. Busy, occupied buildings like these are where clean supply air matters most. About 0.7 miles north-east of Boxmoor is Hemel Hempstead Hospital, the nearest hospital. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. Boxmoor is about 24 miles from central London, well within the area we cover across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site.
If you manage a school such as Boxmoor Primary School, ventilation cleaning is best booked for the holidays. If you run an office near Hemel Hempstead station, its supply ductwork can gather dust for years before anyone looks inside. If you run a surgery, dental practice or care home near Boxmoor, clean ventilation matters as much to you as to a hospital like Hemel Hempstead Hospital (about 0.7 miles north-east).
Boxmoor is about 1 mile south-west of Hemel Hempstead, in Hertfordshire. Sites in Boxmoor get the same service as everywhere we cover: a survey first, a fixed quote, work timed around your hours and a report with pictures. Our Hertfordshire coverage runs to 381 places, and Boxmoor is one of them. Our Milton Keynes page covers sites nearby, about 23 miles away.
All of HP1, HP3 and HP2 is covered for AHU cleaning, from busy streets to back roads. Local streets include Cardy Road, Heath Lane and London Road, and we cover them all for AHU cleaning. With the A4251 close by, Boxmoor is easy for our technicians to reach for AHU cleaning. We also cover the places around Boxmoor: Warner's End (1 mile north), Grovehill (1 mile north-east), Woodhall Farm (1 mile north-east), Apsley (1 mile south-east) and Hemel Hempstead (1 mile north-east). Within a short drive, we also cover Watford (7 miles south-east), St Albans (7 miles east), Welwyn Garden City (13 miles east), Harpenden (8 miles north-east), Hatfield (11 miles east) and Borehamwood (11 miles south-east).
What’s near Boxmoor
Typical jobs here are in premises near Gadebridge Park, The Hemel Hempstead School and Fishery Inn, among other places. There’s a railway station in Boxmoor itself: Hemel Hempstead station. A little further out are Hemel Hempstead Hospital (0.7 miles north-east). Green spaces nearby include Long Deans.
Why it’s worth doing now in Boxmoor
Tenants, auditors and owners may want proof that the air handling plant is kept clean. A TR19® certificate and photo report give you that, ready to show anyone who asks. Booking now means the visit to Boxmoor is planned around you, not forced by a breakdown.
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Ask for a fixed quote and we’ll go through it with you.
Why book with us
- Every job surveyed first
- A fixed price before any work starts
- Full insurance on every job
- One contact for all your sites in London and the South East
See what affects the cost or our accreditations and certificates.
How the visit works
We work around your opening hours, not the other way round. We book the visit for a time the area is closed, whether that is an evening, overnight or a weekend. When the team arrives, the work area is protected and the relevant equipment is switched off to cool, and the work takes half a day to a full day per unit, with large plant planned over several shifts. For a site near Boxmoor, the work is booked around your opening hours, evenings and weekends included.
- We start with a survey of the unit and a fixed quote for the work.
- The unit is shut down with your site team and the area protected.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- Drain trays are cleared and cleaned and the outlet checked.
- We close up the unit and send the certificate and before and after photos.
Preparing for the visit
- Let us know when the site is closed or quiet
- Clear loose items from the work area
- Have your last certificate or report to hand
How to get a quote
Here’s what helps us quote: the address, the type of site and when it’s open, a few pictures and the last certificate or report, if there is one. Then give us a ring on 0345 646 2711 or email us.
Related advice
Looking after it afterwards
Good habits slow the build-up between visits. A few tips:
- Check the drain tray is emptying during routine visits
- Keep inspection doors on the unit in good order
- Clear leaves and litter away from the intake
- Report musty smells from the vents straight away
When we’ve closed the unit up, it can be restarted with your site team. Check the drain tray is emptying over the first few days to make sure it stays clear.
Regular inspection under TR19® Air shows when cleaning is due, rather than waiting for a problem.
How the job changes from site to site
Filters
Dirty filters cut airflow and let dirt slip past their frames. We clean the frames and rails so the filters sit tight.
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. We clean the impeller, housing and surrounding section.
What staff can safely do
For ventilation and air handling systems, in-house care is mostly about checks: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Logging matters as much as cleaning. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, next to our reports.
Common questions in Boxmoor
Can you come to Boxmoor after we close?
Yes, nights and weekends are routine for us. The work in Boxmoor can fit around your hours. Your opening times are the first thing we ask for.
Can ventilation in schools around Boxmoor be cleaned out of term?
Yes, out-of-term visits are normal for schools. With about 20 schools and colleges on the FSA’s register within roughly a mile and a half of Boxmoor, it pays to plan holiday dates ahead. You can call 0345 646 2711 or send us an email with the dates the site is empty.
Does the AHU have to be shut down for cleaning?
Yes, for the time we’re working on it. We can work evenings, overnight or at weekends to keep disruption down.
Are you fully insured?
Yes. Full insurance covers our work and have been trading since 2009.
Do you work with multi-site operators?
Yes. Send the list of sites and the work at each and we will quote them together.
Is Boxmoor in your area?
Yes. We work across Greater London, Surrey, Kent, Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, Boxmoor included.
What happens to the waste?
Waste is contained during the work and removed when we leave, including grease, debris and dirty water. We do not leave it behind.
What is TR19?
A BESA specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It is not legislation, but it’s the standard people check against.
What affects the cost of AHU cleaning
A fixed price needs a few facts first. We look at:
- The size of the system
- Access, including roofs, risers and ceiling voids
- Travel, parking and unloading
- Working hours and out-of-hours timing
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, and a neglected system can mean more work. If you are unsure, call 0345 646 2711 or email us for straight advice and a fixed quote.
Helping us quote
There’s no need for technical detail. It helps if you can send:
- Photos showing the whole system and its surroundings
- Your last certificate, test record or report
- Problems your staff have spotted
- The site address and the type of premises
To get a fixed quote, ring 0345 646 2711, or email photos and tell us the type of site, your opening hours and roughly what the system looks like. A few pictures and your last certificate or report help a lot. We usually come back within one working day.