Hertfordshire · Air handling unit cleaning
AHU Cleaning in Stevenage
Our technicians work in Stevenage on AHU cleaning. Fixed quotes, work around your opening hours and photo reports on every job.
- Dust-coated heating and cooling coils
- Blocked condensate drains and slimy trays
- Intake sections clogged with outdoor debris
Signs you need AHU cleaning in Stevenage
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray does not fall properly, water stands in it, and slime and smells soon follow.
Clients normally contact us when they notice one of these:
- Drain trays holding standing water
- Coils clogged with dust and debris
- Dust built up on fan impellers
- Odours coming through the supply air
If you run a surgery, dental practice or care home near Stevenage, clean ventilation matters as much to you as to a hospital like Lister Hospital (about 1.7 miles north-west).
Before booking anyone
- Proof of accreditation you can verify
- If the quote is a fixed price or an estimate
- When they can work, and whether that is outside your opening hours
- What records you will receive afterwards
How we handle AHU cleaning in Stevenage
Think of an AHU clean as a full check-up for the ventilation. Every section is opened, cleaned and photographed, so you can see the unit’s condition for yourself. We’re often asked to deal with rooms that smell stuffy when the system runs and dirty coils holding back the airflow, across drain trays, dampers and louvres and supply and extract fans.
A place as big as Stevenage has offices, schools and hotels, many with ducted supply and extract ventilation. Dust in a supply duct ends up in the air people breathe, so TR19® Air cleaning follows an inspection.
Duct Doctor has been trading since 2009, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
- Place
- Stevenage (SG1, SG2, SG3)
- Region
- Hertfordshire
- Records
- Written report with photos
- Price
- Fixed quote, typically within a working day
- When we work
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
Nearby places to Stevenage
Other services in Stevenage
Managing agents and facilities teams in Stevenage
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 can quote for the whole system.
Keeping records across a portfolio is half the battle. Every visit ends with a dated report and photos, ready to show insurers, fire officers or EHOs.
What affects the quote in Stevenage
The price is fixed before any work begins. It’s based on:
- When the work can happen, such as evenings, overnight or weekends
- Whether several sites go on one quote
- A single visit or a regular plan
- Access, including roofs, risers and ceiling voids
What you pay depends on the size of the system, the condition it’s in and how easy it is to reach. We give you a fixed price before work begins, so there are no surprises.
What to send for a quote
There’s no need for technical detail. Just send:
- Any access panels or hatches you can see
- Your opening hours and when the area is out of use
- Photos showing the whole system and its surroundings
- Where the site is and what kind of site it is
Some systems can be priced from photos; others need a survey. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.
Staff cleaning versus specialist work
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease call for the right kit, training and safe access. That is our job.
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but the parts you can’t see still need a specialist at the right interval.
What happens on the day
At the end of the visit, someone from your team can look over the work with us. We point out anything that couldn’t be reached or needs a follow-up, and the same goes into the written report. All told, the work takes half a day to a full day per unit, with large plant planned over several shifts. We’ll ask where we can park in Stevenage and how to get equipment to the system, as those shape the visit.
- We agree a shutdown window that suits the building.
- 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.
- After pictures are taken and the certificate issued.
Getting ready for the visit
- Find the previous report, if there is one
- Tell us about site rules, permits or sign-in
- Mention any parking or loading restrictions
Ask for a quote
To help us quote: the address, the type of site and when it’s open, photos of the system and the last certificate or report, if there is one. Once you have those, phone us on 0345 646 2711 or email us.
Related advice
AHU cleaning in Stevenage: local notes
Going by the FSA’s register, there are about 39 schools, colleges and universities, about 23 caring premises (care homes, nurseries and hospitals) and about 5 hotels and B&Bs serving food across Stevenage and its immediate surroundings (about a mile and a half). Where buildings like these have air handling units, filters, coils and drain trays need regular attention. Stevenage is about 29 miles from central London, well within the area we cover across London and the South East. A survey and a fixed quote come first, then the visit at a time that suits you. Lister Hospital is the nearest hospital, about 1.7 miles north-west of Stevenage. Clean air matters most where people are unwell, and that is as true in a care home as in a hospital.
Wherever a school like Saint Vincent de Paul Catholic Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time.
Stevenage is about 26 miles east of Milton Keynes, in Hertfordshire. Every kind of commercial site in Stevenage, we can take on AHU cleaning. Visits can be booked for evenings, overnight or weekends so trading isn’t interrupted. Our Hertfordshire coverage runs to 381 places, Stevenage among them. Milton Keynes is in our area too, about 26 miles from Stevenage.
Work in SG1, SG2 and SG3 is surveyed, quoted and booked the same way as anywhere else. If you need AHU cleaning at premises on King Pin Square, Market Square and Market Place or anywhere close by, we can help. With the A602 and B197 close by, Stevenage is simple for us to get to for AHU cleaning. Close by, we work in Bedwell (1 mile south-west), Pin Green (1 mile north-west), Chells (1 mile east), St Nicholas (1 mile north) and Rooks Nest (1 mile north). Within a short drive, we also cover St Albans (13 miles south-west), Bishop's Stortford (15 miles east), Welwyn Garden City (8 miles south), Harpenden (10 miles south-west), Hitchin (5 miles north-west) and Hoddesdon (13 miles south-east). Stevenage is one of the larger places we cover in Hertfordshire for AHU cleaning.
Near you in Stevenage
We work in commercial kitchens and buildings around The Heathcote School, Church of Saint Nicholas and Marriotts School. The closest station to Stevenage is Stevenage station, about 1.2 miles south-west. Nearby you will also find Benington Castle (2.9 miles east) and Stevenage Museum (0.8 miles south-west). Green spaces nearby include Pryor's Wood.
How the job changes from site to site
Heating and cooling coils
Cooling coils stay damp in use, so dirt on them can turn sticky. The coil and its drain tray are cleaned as one job.
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 the housing around them is cleaned too.
Aftercare tips
Results last longer with the right care. Here’s what we suggest:
- Note any water around the unit or leaks below it
- Don’t store bins or materials near the intake
- Change filters on schedule and log each change
- Keep the certificate and photo report with the plant records
Once the clean is done, we send a TR19® certificate and a report with before and after pictures. Keep both with the building’s maintenance records.
Make sure access doors and panels on the unit open easily. If a section is hard to get into, it tends not to get checked.
Common questions in Stevenage
Do you cover Stevenage for AHU cleaning?
Yes, Stevenage is within the area we cover across London and the South East. To start, give us a ring on 0345 646 2711 or send us an email with a few photos of the system.
Can ventilation in schools around Stevenage be cleaned out of term?
Yes, holiday work suits schools best. There are about 39 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Stevenage. You can ring 0345 646 2711 or email us with the dates the site is empty.
Is there a survey before the work?
Yes. Every job is surveyed first, from your pictures and details, or with a visit where necessary. A fixed quote follows.
Is a quote from pictures possible?
Yes, if we can see what we need. Otherwise, we book a survey at a time that suits the site, and the quote follows that.
How much does AHU cleaning cost in Stevenage?
Every site is different, so each gets its own fixed quote. For a quote, call 0345 646 2711 or send us an email with the site type, opening hours and a few pictures.
How far ahead should we book?
It depends on the time you need and how big the job is. Mention your preferred dates with your enquiry, and if it’s an emergency, call us any time.
Do you offer emergency callouts?
Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, and the emergency line covers the rest.
What’s included in an AHU clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. The survey confirms what’s in your unit before we quote.