Hertfordshire · Grease filter exchange
Grease filter exchange in Trowley Bottom, Hertfordshire
Grease filter exchange for businesses, landlords and public buildings in Trowley Bottom. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- A greasy plenum behind the filters
- Hand-washed filters that still look greasy
- Weak extraction at the canopy
Grease filter exchange for kitchens and businesses in Trowley Bottom
The filters in the canopy are the first thing cooking vapour meets. Their job is to stop grease getting further into the system and they do it best when they’re clean. Our grease filter exchange service swaps dirty filters for clean ones on a schedule. Typical jobs include drips falling from the filters onto equipment and a greasy plenum behind the filters, across wall canopies, baffle filters and restaurants and pubs.
Rural kitchens often have long, low duct runs through a roof space or along an outside wall, and those horizontal sections are where grease settles. Access, parking and timings are agreed before the day.
For insurers and inspectors, the record counts. So every job comes with a written report and photos, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Place
- Trowley Bottom (AL3)
- Region
- Hertfordshire
- Paperwork
- Photo report after every visit
- Quote
- A fixed price before work begins
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
What staff can safely do
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. That part needs specialist access and equipment.
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We will take a look and give you a fixed quote.
What the work involves, part by part
Baffle filters
Baffle filters use overlapping metal blades that force the air to change direction. Grease drops out as it does.
The plenum
Clean filters reduce the grease reaching the plenum, but it’s still cleaned during a full TR19 clean.
What we do, step by step
We start by comparing what we find with the survey or your photos. If anything is different, we talk it through with the person on site before carrying on. After that, the work takes anything from a few minutes to an hour or so, depending on the number of filters. Photos of the system and how to reach it help us plan a visit to Trowley Bottom.
- First, we check the canopies and the filters in them.
- Any damaged or missing filters are noted.
- Greasy filters are swapped for clean ones.
- We check the filters are seated and the canopy is ready to use.
- Anything that needs attention, such as a greasy plenum, is pointed out.
Before we arrive
- Mention any locked doors, roof access or ceiling voids
- Arrange a key holder or contact on site
- Let us know when the site is closed or quiet
Getting a quote
Here’s what helps us quote: the address, the type of site and when it’s open, a few photos and the last certificate or report, if there is one. Once you have those, call 0345 646 2711, or email photos.
Read more
Keeping the system healthy
Simple habits between visits make a real difference. Our advice:
- Keep the canopy clear for exchange visits
- Always run the extract while cooking
- Tell us if the menu or opening hours change
- Look out for drips from the canopy
We tell you if we spot anything in the canopy that needs attention. It can be a sign that a full TR19® clean is due and we can book that in.
Clean filters plus regular full cleans keep the system in good health. Setting both up on a schedule keeps everything on track.
Grease filter exchange in Trowley Bottom: the local picture
According to Food Standards Agency records, there are about 4 pubs, bars and clubs within 1.5 miles or so of the middle of Trowley Bottom. A pub or hotel kitchen that cooks every day builds up grease in its extract like any other. Food hygiene inspections in Trowley Bottom are the job of Dacorum council’s environmental health team. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. Before-and-after pictures from each clean are a simple way to show the extract is in hand. Trowley Bottom sits within the area of Hertfordshire Fire and Rescue Service. In most workplaces, including commercial kitchens, it’s the fire and rescue authority that enforces the Fire Safety Order.
Healthcare kitchens, like those at hospitals such as Hemel Hempstead Hospital (about 4.5 miles south), often cook for long hours, which puts them in BESA’s heavier-use bands. School kitchens, at schools like Flamstead Village School for example, are usually cleaned in the holidays so no lunches are lost.
Trowley Bottom is about 4 miles west of Harpenden, in Hertfordshire. Across the AL3 area, we cover grease filter exchange for commercial sites. Trowley Bottom is one of 381 places in Hertfordshire we cover for commercial clients. We also work in Milton Keynes, around 21 miles away.
Our technicians cover all of AL3 for grease filter exchange and the roads nearby. If you need grease filter exchange at premises on Trowley Hill Road, Trowley Bottom and Wood End Lane or a nearby road, we can help. We also cover the places around Trowley Bottom: Flamstead (1 mile north-east), Friar's Wash (1 mile north-east), Markyate (2 miles north-west), Roe End (2 miles north-west) and Jockey End (2 miles west). Larger places within reach include Watford (11 miles south), Hemel Hempstead (4 miles south), Stevenage (13 miles north-east), St Albans (6 miles south-east), Welwyn Garden City (11 miles east) and Harpenden (4 miles east).
What’s near Trowley Bottom
Locally, jobs take us to businesses close to Rose And Crown Public House, among other places. The closest station to Trowley Bottom is Harpenden station, roughly 3.8 miles east. Other landmarks nearby include Luton Castle (4.4 miles north) and Hemel Hempstead Hospital (4.5 miles south). The countryside around Trowley Bottom includes Landpark Wood.
Places near Trowley Bottom
More services for Trowley Bottom
Managing agents and facilities teams in Trowley Bottom
From a single site to a large estate, the standard is the same: a survey first, a fixed quote, the work timed around the site and a report with pictures.
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. With shared responsibility, good records help everyone.
What a clean will not put right
It’s worth knowing the limits before booking:
- Grease behind the filters that a swap cannot remove
- Extraction problems caused by the fan rather than the filters
- A canopy that doesn’t capture the vapour properly
Not sure which it is? You can phone us on 0345 646 2711 or send us an email and we’ll tell you honestly before booking.
Where we work
- Island canopies
- Wall canopies
- Mesh filters
- School and hospital kitchens
- Restaurants and pubs
- Baffle filters
Trowley Bottom: your questions answered
Who enforces fire safety at workplaces in Trowley Bottom?
Fire safety enforcement in Trowley Bottom is handled by Hertfordshire Fire and Rescue Service. 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.
Do you work overnight in Trowley Bottom?
Yes, nights and weekends are routine for us. Your customers, staff or residents in Trowley Bottom needn’t be disturbed. Just give us a ring on 0345 646 2711, or send details by email with your opening times and we’ll plan around them.
What if parts of the system cannot be reached?
We never leave them off the paperwork. The report says which parts couldn’t be reached and why, along with a quote to put access in.
How much notice do you need?
Earlier is better, particularly for night and weekend visits. We typically quote within one working day, and there’s a 24/7 line for emergencies.
Are you fully insured?
Yes, fully. We also hold CHAS and SafeContractor, for sites that check contractor safety.
What types of premises do you cover?
All kinds of commercial and public premises: kitchens, offices, schools, healthcare, retail, leisure and food production. Work is timed around how each site runs.
Do you clean filters as well as exchanging them?
We offer filter cleaning as well as exchange. We’ll explain the options when you get in touch.
Do you offer maintenance contracts?
Yes. Plans on a 3, 6 or 12-monthly cycle are available, to suit the system and how it’s used.
Common problems we fix in Trowley Bottom
Repeated removal and washing takes its toll on filters. Damaged filters do not sit flush and grease passes round them.
These are the problems we see most often:
- Filters so greasy the air can barely pass
- Filters that leave gaps in the canopy
- A greasy plenum behind the filters
- Filters left unwashed on busy weeks
Church and community hall kitchens, near Church of St Leonard or anywhere around Trowley Bottom, are easy to forget, but their extracts collect grease like any other.
Comparing quotes
- Whether inaccessible sections are listed on the report
- What records you will receive afterwards
- Whether the work can be done while the site is closed
- Whether a survey comes first