Hertfordshire · Grease filter exchange
Grease Filter Exchange in Northaw
One call covers grease filter exchange in Northaw: survey, fixed quote, work and sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Filter washing that keeps being missed
- Smoke and heat lingering under the hood
- Damaged filters letting grease past
What happens if it’s left?
Changing filters on schedule costs far less disruption than a blocked extract. Few maintenance jobs are as easy, and one of the easiest to let slip. It’s worth booking a check, because nobody sees inside a duct day to day.
You won’t find a price list here, because each job is priced on what it involves. Call for a fixed quote, and we will explain what it covers.
Why Northaw businesses choose us
- Photo reports with every job
- Out-of-hours work and a 24/7 emergency line
- Survey first, then a fixed quote
- Fixed quotes from a survey or pictures
Take a look at what affects the cost or how to check a contractor.
Grease filter exchange in Northaw, done properly
Think of filter exchange as routine care for the extract. Between full cleans, it keeps the airflow healthy, 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 damaged filters letting grease past and grease dripping from the canopy, we can help, from baffle filters, wall canopies and mesh filters onwards.
Somewhere as small as Northaw, commercial kitchens are few: perhaps a pub, a school or care home kitchen, or a hall used for events. Every one of them still needs its extract kept clear of grease, whatever the size of the place.
For insurers and inspectors, the record counts. That’s why every job is written up in a report with photos, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Where
- Northaw (EN6)
- Region
- Hertfordshire
- Reporting
- Written report with photos
- Quotes
- Fixed quote, normally within a working day
- Working hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Northaw questions
Which fire service covers Northaw?
Hertfordshire Fire and Rescue Service is the fire and rescue service for Northaw. Records of extract cleaning are a sensible thing to have ready if a fire safety officer carries out an audit.
Can you get to a site in Northaw?
Yes. Villages and rural sites across the South East are part of our work, Northaw included. A survey first, from pictures or a visit, means we arrive with the right kit.
Which sectors do you work in?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, plus food production and leisure sites.
How often should grease filters be changed?
That depends on the cooking. Heavy cooking means more frequent changes than lighter ones. We set a schedule that suits your kitchen.
How long does the visit take?
That depends on how much there is to do, but for many sites it takes well under an hour for most canopies. We’ll give you a better idea when we quote.
Does the report say when we need you again?
Yes. We put a recommended next date on the report. For kitchen extracts, BESA’s minimum intervals run from every 3 months for heavy use to every 12 months for light use, while fire dampers are tested at least annually.
What is TR19?
It’s BESA’s specification and the benchmark insurers, fire officers and EHOs look to. It sets out inspection, cleaning and record keeping, and it takes a risk-based approach.
Can we book visits on a schedule?
Yes, of course. Tell us what you have and how it’s used and we’ll propose a schedule with a fixed quote.
The process
Our technicians bring everything the work needs, from protective sheeting to tools and access equipment. You only need to give us clear access and switch off what needs to be off. On site, the work takes less than an hour in most kitchens. If you can send pictures, we can arrive in Northaw knowing what to expect.
- The filters in each canopy are measured and counted.
- An exchange schedule is agreed to suit your cooking.
- The dirty set is lifted out.
- Clean filters go in and we check they sit snugly.
- We take the greasy set away and confirm the next date.
Before we arrive
- Make sure equipment near the work can be switched off and left to cool
- Agree a time when the area can be out of use
- Clear the space around the work
Get a fixed quote
Getting a quote doesn’t take long. Call or email with a few details and you will usually have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Related advice
Between visits
Looking after the system between visits is straightforward, and it helps at the next visit:
- Never leave gaps in the filter bank
- Keep the extract on whenever the range is in use
- Keep canopy surfaces wiped down
- Keep filter exchange and TR19 cleaning on the same plan
Keep an eye out for filters that have been taken out. A missing filter leaves a gap for grease so tell us if you need a replacement.
Damaged filters leave gaps in the defence. Replacing them early protects the plenum and ductwork.
When to call us in Northaw
Hand-washed filters often come back still greasy. Grease hides in the folds of a baffle or the layers of a mesh, and a quick rinse leaves it there.
These are the problems we see most often:
- Grease left in baffles after washing
- Filter washing that keeps being missed
- A greasy plenum behind the filters
- Drips falling from the filters onto equipment
If you look after a school kitchen, at a school such as Northaw Church of England Primary School or anywhere near Northaw, the holidays are the usual time for a TR19® clean.
Questions to ask before booking
- Whether a written report and photos are included
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Exactly which parts of the system are covered
- Whether VAT is included
Grease, kitchens and Northaw
Food Standards Agency data counts about 14 cafés, restaurants and staff canteens and about 5 takeaways and sandwich shops across Northaw and its immediate surroundings (about a mile and a half). Where they cook under a canopy, the grease filters are the first line of defence and clog quickly. Northaw 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. Environmental health officers from Welwyn Hatfield council inspect food businesses in Northaw. Extraction counts as kitchen equipment, so its condition can come up on the day. Before-and-after pictures from each clean are a simple way to show the extract is in hand.
Volunteers running a hall kitchen near Parish Church of St Thomas A Becket, or anywhere in Northaw, may not know when the extract was last cleaned, and a grease test settles it. Older buildings often hide long, awkward duct runs, and if you run a kitchen at a historic venue in the area (Wyllyotts Manor is about 2.1 miles west), access may need planning.
Northaw is about 2 miles north-east of Potters Bar, in Hertfordshire. Northaw gets the same approach as every site we work on: a survey first, a fixed quote, work timed around your hours and a report with photos. Across Hertfordshire, we cover 381 places, and Northaw is one of them. You can also see our page for London, about 14 miles away.
Postcode districts we cover here for grease filter exchange: EN6. Whether your site is on Vineyards Road, Church Lane and Northaw Road West or a nearby road, our technicians can take on the work. Close by, we work in Cuffley (1 mile east), Brookmans Park (2 miles north-west), Newgate Street (2 miles north-east), Bell Bar (2 miles north-west) and Little Berkhamsted (3 miles north). Further out, we also cover Watford (11 miles west), Hemel Hempstead (14 miles west), Stevenage (14 miles north), St Albans (8 miles west), Welwyn Garden City (7 miles north) and Harpenden (12 miles north-west).
Local landmarks in Northaw
Around Northaw, our work takes us to kitchens and buildings near Two Brewers Public House and Mount Grace School. The nearest railway station is Cuffley station, roughly 1.6 miles east of the centre. Well-known places in the area include Potters Bar Museum (2.1 miles west) and Chase Farm Hospital (3.3 miles south-east). The countryside around Northaw includes Fir and Pond Woods.
In-house cleaning or a specialist?
Staff cleaning doesn’t replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but they don’t reach the grease that builds up further in. That part needs specialist access and equipment.
What the work involves, part by part
Canopy filter housings
Grease collects in the channels and drip trays below the filters. If it needs attention, we will tell you.
The plenum
Heavy grease in the plenum often follows clogged or missing filters or that the next TR19 clean is due.
Landlords, agents and facilities managers
Managing agents often deal with us directly. Send the address, what’s needed and how access works and we will come back with a fixed quote.
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We’re happy to deal with either side, and the report can go to both.