Hertfordshire · Grease filter exchange

Grease filter exchange in Loudwater, Hertfordshire

Grease filter exchange in Loudwater from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.

  • Filters that leave gaps in the canopy
  • A greasy plenum behind the filters
  • Weak extraction at the canopy

Need grease filter exchange in Loudwater?

How the visit works

There are three stages on the day: getting the area ready, doing the work and signing it off. Getting ready means protecting surfaces and switching off what needs to be off, and the sign-off is a written report with photos. The middle part takes longest, and that takes a short visit, depending on how many filters the canopies hold. Rural roads and tight entrances are worth telling us about before a visit to Loudwater.

  1. We record the number, size and type of your filters.
  2. An exchange schedule is agreed to suit your cooking.
  3. On each visit, we remove the greasy filters.
  4. Clean filters go in and we check they sit snugly.
  5. The dirty filters leave with us and the next visit is booked.

Getting ready for the visit

  • Find the previous report, if there is one
  • Arrange a key holder or contact on site
  • Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas

Ask for a quote

Here’s what helps us quote: where the site is, what it is and its opening hours, a few photos and any previous report or certificate. Once you have those, phone us on 0345 646 2711 or drop us a line.

Get a quick quote

Read more

Grease filter exchange in Loudwater, done properly

We set up grease filter exchange for kitchens in Loudwater on a schedule that suits their cooking. The heavier the cooking, the more often filters need changing, lighter ones less. The interval is agreed before the first visit. If you have a canopy running with filters missing and grease building up behind the canopy filters, we can put it right.

Somewhere as small as Loudwater, commercial kitchens are few: perhaps a pub, a school or care home kitchen, or a hall used for events. Each still has a canopy and duct that collect grease.

We’ve been trading since 2009, and we are 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
Loudwater (WD3)
Wider area
Hertfordshire
Records
Photo report after every visit
Price
A fixed price before we start
Hours
After hours by arrangement; emergencies any time
Phone
0345 646 2711
Page updated
30 October 2026
The Duct Doctor team standing beside their branded white and blue vans

Landlords, agents and facilities managers

Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we’re happy to quote for all of it.

The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.

What staff can safely do

Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but the parts you cannot see still need a specialist at the right interval.

Staff cleaning and specialist work are not the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.

Signs you need grease filter exchange in Loudwater

Repeated removal and washing takes its toll on filters. Damaged filters do not sit flush and grease passes round them.

Signs it’s time to call us include:

  • A canopy that drips grease
  • A greasy plenum behind the filters
  • Gaps where filters have been removed
  • Weak extraction at the canopy

Older buildings often hide long, awkward duct runs, and if you run a kitchen at a historic venue in the area (Chenies Manor House is about 2.5 miles north-west), access may need planning.

Questions to ask before booking

  • Whether the price is fixed
  • How areas they cannot reach will be recorded
  • Whether the work can be done while the site is closed
  • Whether the quote shows VAT

How to choose an extract cleaning contractor

Loudwater questions

Do you do school kitchen extract cleaning in Loudwater in the summer holidays?

Yes, out-of-term visits are normal for schools. Around Loudwater, the Food Standards Agency lists about 20 schools and colleges with registered kitchens within a mile and a half or so. Booking early in the term gives the best choice of holiday dates.

Which fire authority looks after Loudwater?

It’s Hertfordshire Fire and Rescue Service, which covers Loudwater. If a fire safety officer visits a commercial kitchen, they may ask about the fire risk assessment and how the extract is kept clean.

Do you take the used filters away?

Yes. The dirty filters are taken away for cleaning and the clean set stays in the canopy.

Does the report say when we need you again?

Yes. How often depends on use and condition and the report sets out why.

Which sectors do you work in?

We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, as well as food production and leisure sites.

What is TR19?

A BESA specification, with two parts that matter most here: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It isn’t law, but it’s the benchmark.

What if parts of the system can’t be reached?

Anything we cannot reach goes on the report, with a note of where it is, and we tell you what would make it reachable, such as extra access panels in ductwork.

How do you protect the area?

By covering it before any work starts. We keep the work contained and clean down when we finish.

Part by part

Canopy filter housings

Filters sit in a housing or channel in the canopy. A damaged housing leaves gaps.

Baffle filters

In a baffle filter, the air zigzags through metal baffles. Grease drops out as it does.

Grease filter exchange in Loudwater: the local picture

There are about 39 restaurants, cafés and canteens and about 20 takeaways and sandwich shops in Loudwater and the streets around it, up to about 1.5 miles out, according to the Food Standards Agency’s register. Swapping filters on a schedule keeps kitchens like these drawing air properly. Kitchens in Loudwater get their food hygiene inspections from Three Rivers council. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. A dated certificate in the maintenance file answers the question before it’s asked. The fire and rescue service for Loudwater is Hertfordshire 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.

School kitchens, at schools like Christ Church Chorleywood CofE School for example, are usually cleaned in the holidays so no lunches are lost. Kitchens that cook twelve hours or more a day, as some healthcare kitchens do, fall into BESA’s three-monthly minimum; Bishops Wood Hospital is the nearest hospital to Loudwater, about 3.2 miles south-east.

Loudwater is about 1 mile north-east of Chorleywood, in Hertfordshire. From the centre of Loudwater to the outskirts, we cover grease filter exchange for every kind of premises, from a single unit to a large public building. 381 places in Hertfordshire are on our list, large and small. We also work in London, about 20 miles from Loudwater.

We work across the WD3 postcode area for grease filter exchange and the roads nearby. Streets in the area include Chess Lane, Bridle Lane and Sarratt Lane, and we cover them all for grease filter exchange. Neighbouring places we cover for grease filter exchange include Chorleywood West (1 mile south), Micklefield Green (1 mile north), Rickmansworth (1 mile south-east), Mill End (2 miles south) and Chandler's Cross (2 miles north-east). Within a short drive, we also cover Watford (4 miles east), Hemel Hempstead (7 miles north), St Albans (9 miles north-east), Harpenden (12 miles north-east), Hatfield (13 miles north-east) and Borehamwood (9 miles east).

What’s near Loudwater

Around Loudwater, our work takes us to kitchens and buildings near Saint Joan of Arc Catholic School, Rickmansworth Park and York House School and the streets around them. The closest station to Loudwater is Rickmansworth station, about 1.2 miles south. Well-known places in the area include Bishops Wood Hospital (3.2 miles south-east) and Chiltern Open Air Museum (3 miles south-west). Not far away are Tumbling Bay and Chorleywood Common.

Map of Loudwater © OpenStreetMap contributors

Fixed quotes for grease filter exchange in Loudwater

The price is fixed before any work begins. It’s based on:

  • Site requirements such as sign-in and permits
  • Whether it’s a one-off visit or part of a schedule
  • When the work can happen, such as evenings, overnight or weekends
  • Access, including roofs, risers and ceiling voids

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 work begins, so there are no surprises.

What to send for a quote

What to send for a quote:

  • Where the plant sits or the system leaves the building, such as a roof or outside wall
  • Anything you’ve noticed, such as smells, noise, drips or poor airflow
  • Any previous report or certificate
  • Wide pictures of the system and the area around it

For a fixed quote, phone us on 0345 646 2711 or send us an email and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. We usually come back within one working day.

Keeping the system healthy

Think of this as the after-treatment advice, short and simple:

  • Report a dripping canopy early
  • Keep the extract on whenever the range is in use
  • Never leave gaps in the filter bank
  • Keep filter exchange and TR19 cleaning on the same plan

If the plenum behind the filters looks greasy, we say so. It can be a sign that a full TR19® clean is due and we can book that in.

A kitchen that is getting busier needs its filters changed more often. Changing the interval early stops grease building up unseen behind the canopy.

BESCA Vent Hygiene EliteMember, cleaning to BESA TR19® Grease
CHAS · SafeContractorISO 9001 and fully insured
Certificate and photo reportWith every clean
24/7 emergency calloutEvenings, nights and weekends
Since 2009South East England and London