Air duct cleaning in Hengelo

What do the figures say about businesses in Hengelo?

Hengelo has 83,058 inhabitants and ranks 47th of the 342 municipalities. With 1,365 inhabitants per km² on 6,084 hectares, the municipality is strongly urban (class 2). There are almost 122 business establishments per 1,000 inhabitants, spread over these sectors:

Businesses outside hospitality have kitchens too: canteens in offices, kitchens in care locations and schools. That makes kitchen extraction in Hengelo a wider topic than restaurants alone.

Is cleaning extract ducts in Hengelo mandatory?

There is no statutory frequency, KHN (Royal Dutch Hospitality Association) reports. A hospitality operator must, however, maintain the extraction installation and the duct in such a way that no fire hazard arises, and fire insurers require regular maintenance. A few concrete reference points:

• KHN: in practice at least once a year, more often with grill, fryer or wok.
• Rabobank: professional cleaning at least once a year, twice for a restaurant that fries a lot.
• Goudse prevention conditions: clean or replace grease filters weekly, have the duct and fan inspected annually and cleaned by a specialist where needed.
• EN 15780:2025: the revised standard now also covers commercial kitchen extract systems.

Rabobank points out that most hospitality fires start in the kitchen and that the extraction installation is a major culprit. More about this sector is covered under commercial kitchen ventilation cleaning for cleaning contractors.

How thick may the grease layer in a Hengelo kitchen extract be?

For grease in ducts there are clear figures. The NVRL quality mark scheme, drawn up with TNO, uses an intervention value of 500 µm and a performance value of at most 200 µm after cleaning. Measurement is done with a wet film thickness gauge: one sample behind every extraction hood and one per 10 metres of duct, with an accuracy of 20 µm. The quality mark is valid for 1 year.

KHN points out that serious contamination is often not visible to the naked eye. A camera inspection of the duct is therefore part of a proper check, not just a look into the hood.

Duct cleaning Hengelo: from heavy kitchens to light use

Not every kitchen gets dirty at the same rate. A British cleaning company links the frequency to the number of operating hours per day:

This is a British practice guideline, not a Dutch rule. Use it to support your own schedule, together with the requirements of your insurer. More on intervals for all types of duct is covered under duct cleaning frequency for businesses.

Write down the actual operating hours of each kitchen rather than estimating them. A canteen that also serves evening events may move from light to moderate use without anyone noticing, and the schedule should follow.

Dry or wet cleaning: what suits which duct?

According to Eurovent, dry methods are usually sufficient for supply ducts and general extract, while commercial kitchen extract calls for wet methods. In addition, the Goudse requires fixed, non flexible and non ribbed ductwork of aluminium or steel.

For the dry ducts in offices, schools and care buildings, electric DC4 brushing machine in practice is suitable: up to 30 metres of reach, ducts from 100 to 600 mm, round and square. Danduct also supplies a spray system for the DC4, the DC4 Sprayer System. Ask Lamers which version suits your ducts. You can air duct cleaning tools explained with all machines side by side.

Fictional example: a caterer with three kitchens

A fictional caterer in Hengelo has a production kitchen that runs twelve hours a day and two canteen kitchens used three hours a day. He has the grease layer measured following the method of the NVRL scheme. In the production kitchen, 420 µm is measured behind the hood; in the canteens, less than 200 µm.

He has the production kitchen cleaned shortly afterwards by a specialist company, with a report and certificate for the insurer. For the canteens, an annual measurement is sufficient. The grease filters in all three kitchens are cleaned weekly, as the Goudse requires. Amounts are not included in this example; they depend on the situation.

Ventilation duct cleaning Hengelo and the Twente neighbours

If you work in the region, two pages are of interest: air duct cleaning in Enschede about the largest municipality in Overijssel, and air duct cleaning in Deventer about keeping a maintenance file. The overview of all municipalities is available under air duct cleaning near me for businesses.

Lamers has no branch in Hengelo but is located in the same part of the country. You request a quote, ask for a callback or ask a question through the site.