Hampshire · Air handling unit cleaning
Air handling unit cleaning in Knightwood, Hampshire
One call covers cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Knightwood, from survey to sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Air handling units never cleaned inside
- Debris and leaves in the fresh air intake
- Dirty fans and fan housings
How the job changes from site to site
Heating and cooling coils
A dirty coil holds back the air and makes heating and cooling less effective. Cleaning restores the open path through the fins.
Filters
Clogged filters reduce airflow, and dirt can get round the edges. The filter section is cleaned so new or cleaned filters sit properly.
AHU cleaning for kitchens and businesses in Knightwood
An AHU clean is a thorough examination and treatment of the unit. We look inside each section, clean what we find and record it with photos, so you can see the unit’s condition for yourself. The work covers supply and extract fans, heating and cooling coils and dampers and louvres, and the jobs we see most are dirty coils holding back the airflow and air handling units due a clean after building work.
In a place like Knightwood, air handling units are often tucked into roof spaces or small plant rooms, out of sight and easy to overlook. Filters, coils and drain trays need attention whatever the size of the unit.
A written report with photos follows every visit, so you have a record of what was done and when. Kitchen extract cleaning to TR19® Grease is certificated through the BESCA Vent Hygiene Elite portal.
- Where
- Knightwood (SO53, SO52)
- Wider area
- Hampshire
- Reporting
- Report and photos after the visit
- Price
- A fixed quote up front
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
AHU cleaning around Knightwood
Food Standards Agency records list about 6 schools, colleges and universities and about 14 caring premises (care homes, nurseries and hospitals) registered as food businesses within 1.5 miles or so of the middle of Knightwood. Busy, occupied buildings like these are where clean supply air matters most. About 3.5 miles west of Knightwood is Romsey Community Hospital, the nearest hospital. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Classrooms and halls at schools such as Knightwood Primary School are easiest to work in when pupils are away. If you run a surgery, dental practice or care home near Knightwood, clean ventilation matters as much to you as to a hospital like Romsey Community Hospital (about 3.5 miles west).
Knightwood is about 1 mile west of Chandler's Ford, in Hampshire. Knightwood 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. Knightwood is one of 683 towns, villages and districts in Hampshire where we work for commercial clients.
All of SO53 and SO52 is within our area for AHU cleaning, from busy streets to back roads. You will find streets such as Foyle Road, Harvest Road and Flexford Road, and we cover them all for AHU cleaning. Close by, we work in Chilworth Old Village (2 miles south-west), Chilworth (2 miles south), North Baddesley (2 miles west), Toothill (3 miles south-west) and Bassett (3 miles south). Within a short drive, we also cover Winchester (6 miles north-east), Eastleigh (3 miles south-east), Fareham (13 miles south-east), Totton (7 miles south-west), Hedge End (7 miles south-east) and Romsey (4 miles west).
Local landmarks in Knightwood
Typical jobs here are in premises near Toynbee School and the streets around them. Knightwood’s nearest station is Chandlers Ford station, roughly 0.8 miles south-east. Nearby you will also find Romsey Community Hospital (3.5 miles west) and Eastleigh Museum (2.5 miles south-east). For a walk, there’s Flexford Nature Reserve.
How it works
Every visit runs to the same pattern: sheeting and protection first, isolate whatever needs isolating, carry out the AHU cleaning, clear away and leave you the report. The visit itself takes anything from half a day for one small unit to several shifts for a plant room full of them. For a place like Knightwood, we load the van from the survey notes so the work can be done in one visit where possible.
- First we agree when the unit can be switched off, including evenings or weekends.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- We take after photos and issue the certificate and report.
Getting ready for the visit
- Tell us about site rules, permits or sign-in
- Have your last certificate or report to hand
- Let us know how we reach the system, including roofs, risers and plant rooms
Getting a quote
To get a fixed quote, ring 0345 646 2711 or drop us a line with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You will usually have a quote within one working day.
Related advice
What a clean won’t put right
We’d rather tell you now than book work that will not help, so here are the limits:
- Airflow problems caused by the system’s design
- Mechanical faults with motors, belts or bearings
- The supply and extract ducts, quoted separately
If you are not sure, just phone us on 0345 646 2711 or email us and we will give you a straight answer before booking.
What the work covers
- Supply and extract fans
- Filter sections
- Internal panels
- Dampers and louvres
- Heating and cooling coils
- Drain trays
Common questions in Knightwood
Is Knightwood within the area you cover?
Yes, we work in villages as well as towns, and Knightwood is covered. Let us know about access, parking and anything unusual about getting there when you book.
Do you clean school ventilation in Knightwood in the holidays?
Yes, and it’s the easiest time to do it. Around Knightwood, the Food Standards Agency lists about 6 schools and colleges with registered kitchens within a mile and a half or so. You can call 0345 646 2711 or use the quote form with the dates the site is empty.
What information do you need?
Only a few details: where it is, what kind of site, when it’s open and the access. Photos and the last report help too. Then give us a ring on 0345 646 2711 or email us.
What about areas you can’t get to?
Anything we can’t reach goes on the report, with a note of where it is, and we explain what access is needed, for example new access panels.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before any work starts, and waste is contained as we go. At the end, the area is cleaned down.
Can you quote from photos?
Often, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Where we can’t see enough, we arrange a survey.
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 doesn’t spread.
Do you clean the ductwork as well?
Yes. We reach the ducts through access panels, and any sections we can’t reach are noted in the report, with new panels fitted where needed.
Multi-site and managed buildings
If you look after several sites, we can schedule visits across all of them on one quote. Every building has its own written report, so each one has its own record.
We work for landlords, managing agents and facilities managers as well as the people running the site. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we can quote for the whole system.
What affects the quote in Knightwood
There’s no set price list, because no two systems are the same. What we look at:
- Access, including roofs, risers and ceiling voids
- One-off work versus a regular cycle
- Site rules, permits and inductions
- What state the system is in
What you pay reflects the actual work. That’s why we survey first, from photos or on site, and why the quote is fixed before any work starts.
Helping us quote
When you contact us, these details help:
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- When the site is open and when it’s quiet
- Detail shots of panels, filters and grilles
- Your last certificate, test record or report
There’s no standard price list, because no two systems are the same. We look at your system first, from photos or on a visit, and then send you a fixed quote. To start, call 0345 646 2711 or use the quote form.
Why act early in Knightwood
When the unit is clean, less dirt reaches the ducts, so the whole system stays cleaner for longer. That makes the next inspection of a building in Knightwood simpler. A visit arranged in advance is far less disruptive than a callout on a busy day.
No two sites are the same, so each one gets its own fixed quote. The size of the job, how we reach it, its condition and the working hours all play a part.
Why choose Duct Doctor in Knightwood
- Fixed quotes, typically within one working day
- Ventilation hygiene specialists since 2009
- Survey first, then a fixed quote
- Every visit written up, with pictures
Common problems we fix in Knightwood
Planned maintenance often covers belts, motors and filters but not cleaning. That means a unit can tick every service box and still be carrying years of dirt.
Clients typically contact us when they notice one of these:
- Plant that has been serviced but not cleaned
- Leaves and litter drawn into the unit
- Coils clogged with dust and debris
- Drain trays holding standing water
If you manage offices or shops near Chandlers Ford station, their ventilation can be inspected and cleaned out of hours.
Comparing quotes
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Exactly which parts of the system are covered
- Whether a survey comes first
- If the quote is a fixed price or an estimate