Hampshire · Grease filter exchange
Grease Filter Exchange in Alton
Our technicians work in Alton on a scheduled grease filter exchange, swapping dirty canopy filters for clean ones. Out-of-hours visits, a fixed quote and a written report with pictures as standard.
- Drips falling from the filters onto equipment
- Grease filters clogged with grease
- Poor airflow through the filters
Your questions about grease filter exchange in Alton
Can you come to Alton after we close?
Yes, evening, overnight and weekend work is normal for us. That way a site in Alton doesn’t have to lose a day’s trading. Tell us your opening hours when you ask for a quote.
Which fire authority looks after Alton?
It’s Hampshire and Isle of Wight Fire and Rescue Service, which covers Alton. TR19® isn’t law, but it’s the benchmark many fire officers and insurers look to when they ask how often the extract is cleaned.
Are you insured?
Yes. We are fully insured, and the details are available on request.
Are you accredited?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
How often should grease filters be changed?
It depends on how much and what the kitchen cooks. Heavy cooking means more frequent changes than kitchens that cook less. We set a schedule that suits your kitchen.
What happens to the waste?
It leaves the site with us at the end of the visit. While we work, it’s kept contained so the area stays clean.
Can you look after several sites?
Yes. Send the list of sites and the work at each and you’ll get one fixed quote.
What do you do to protect the area?
We cover floors and nearby surfaces with sheeting before we start, and anything we remove is contained. Before we leave, we tidy up and clean down.
How we handle grease filter exchange in Alton
A clean set of filters is a simple, regular dose of prevention. It keeps airflow up and grease down between full cleans, and it saves your staff a greasy job. The full TR19 clean then gives the system its clean bill of health. If you are dealing with filters that leave gaps in the canopy and missing filters in the filter bank, we can put it right.
Many kitchens in a town like Alton were fitted into buildings built for something else, which can mean awkward duct routes, long flat runs and not enough access panels. Where the duct can’t be reached, new panels can be fitted, and anything left uncleaned is recorded on the report.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Place
- Alton (GU34)
- Region
- Hampshire
- Paperwork
- Report and pictures after the visit
- Price
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
Landlords, agents and facilities managers
Running several sites is easier with one contractor. We cover South East England and London, so a run of sites can go into one programme and kept on a regular cycle.
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Every building has its own written report, so each one has its own record.
Also in Alton
In-house cleaning or a specialist?
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Keep a record of what your team does. A simple log of filter washes, wipe-downs and checks helps show that the system is managed between specialist visits, next to our reports.
How it works
Night work is normal for us. Evenings, nights and weekends are when much of our work happens, so the site can open as normal afterwards. The visit itself takes less than an hour in most kitchens. A closed day, an evening or an early start: whichever suits your site in Alton, we’ll book around it.
- We count and measure the filters in every canopy.
- Together we set how often the filters should be changed.
- At every visit, the greasy filters are lifted out.
- Clean filters go straight back in, seated properly with no gaps.
- If a filter is damaged or the plenum needs attention, we tell you.
Preparing for the visit
- Mention any locked doors, roof access or ceiling voids
- Name a contact who can let us in at the agreed time
- Allow time for equipment near the work to be turned off and cool down
How to get a quote
Here’s what helps us quote: where the site is, what it is and its opening hours, a few pictures and the last certificate or report, if there is one. Once you have those, call 0345 646 2711 or email us.
Related advice
What happens if it’s left?
Leaving filters too long pushes more grease into the plenum and ducts. That makes the next full clean a bigger job, and grease may build up faster than the cleaning interval allows. With a fire risk assessment or inspection due, getting the work done first puts you on the front foot.
The cost depends on the size of the system, what state it’s in and access to every part of it. We give you a fixed price before any work starts, so there are no surprises.
Why Alton businesses choose us
- Every job surveyed first
- Accredited under CHAS and SafeContractor, with ISO 9001
- Work around your opening hours, with 24/7 emergency cover
- Photo reports with every job
Read what affects the cost or our accreditations and certificates.
What grease filter exchange looks like in Alton
There are about 19 cafés, restaurants and staff canteens and about 15 takeaways and sandwich shops within roughly a mile and a half of the centre of Alton, according to the Food Standards Agency’s register. Each canopy among them has filters that load with grease and need swapping or cleaning. Food hygiene inspections in Alton are the job of East Hampshire council’s environmental health team. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. Keeping each certificate and photo report on file helps show the extract is looked after. Alton is covered by Hampshire and Isle of Wight Fire and Rescue Service. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk.
Healthcare kitchens, like those at hospitals such as Alton Community Hospital (about 0.9 miles south-west), often cook for long hours, which puts them in BESA’s heavier-use bands. Commuter trade near Alton station can mean long cooking hours, and long hours put a kitchen into BESA’s more frequent cleaning bands.
Alton is about 10 miles south-east of Basingstoke, in Hampshire. We provide grease filter exchange for businesses, landlords and public buildings in Alton and the rest of Hampshire. 683 places in Hampshire are on our list, large and small. You can also see our page for Guildford, about 19 miles away.
All of GU34 is covered for grease filter exchange, from the main roads to the quietest streets. Whether your site is on High Street, Station Road and Goswell Square or a nearby road, our technicians can take on the work. Being close to the A339 and B3004, Alton is easy for our technicians to reach at any hour. We also cover Chawton (1 mile south-west), Holybourne (2 miles north-east), Neatham (2 miles north-east), East Worldham (2 miles south-east) and Golden Pot (2 miles north). Larger places within reach include Basingstoke (10 miles north-west), Farnborough (13 miles north-east), Fleet (10 miles north-east), Aldershot (11 miles north-east), Petersfield (10 miles south) and Yateley (14 miles north-east).
Local landmarks in Alton
Typical jobs here are in premises near Amery Hill School, Treloar School and The 'Baker's Arms' Public House and the streets around them. There’s a railway station in Alton itself: Alton station. Nearby you will also find Allen Gallery (less than half a mile east) and Alton Community Hospital (0.9 miles south-west). Green spaces nearby include Holybourne Hill.
Different parts, different methods
Busy restaurant and pub kitchens
When service is non-stop, filters get forgotten. A regular exchange means nobody has to remember.
Baffle filters
Baffle filters are a common choice for commercial canopies. They don’t clean themselves as the collected grease builds up between the blades.
What we are called out for in Alton
Sometimes a filter is taken out and never put back. Every gap in the filter bank lets grease straight into the plenum and on into the ductwork.
Clients typically contact us after spotting something like this:
- Grease left in baffles after washing
- A greasy plenum behind the filters
- Staff short of time to wash filters
- Blocked baffle filters
Term dates shape school work: for a school like Saint Lawrence Church of England Primary School, an extract clean fits neatly into a half-term or summer break.
Comparing quotes
- Whether the price is fixed
- How areas they can’t reach will be recorded
- Exactly which parts of the system are covered
- Proof of insurance
What affects the quote in Alton
There’s no set price list, because no two systems are the same. The quote depends on:
- The times the site is available
- The size of the system
- A single visit or a regular plan
- How many systems or sites are involved
Every site is different, so each one gets its own fixed quote. The size of the job, how we reach it, its condition and the working hours all make a difference.
Asking for a quote
When you call or email, it’s useful to have:
- Problems your staff have spotted
- Detail shots of panels, filters and grilles
- Any previous report or certificate
- The postcode and the type of business
Quotes are quick. Send a few details and pictures, and we typically reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.