About Ontop

About Ontop Metaloterm

We have over 50 years of experience in the development of flue gas systems for ship building, food industry, industrial applications and non-residential buildings, but also for fire places and stoves in houses. The expertise we developed in the past helps us to realise the most innovative solutions for our customers. We like to continue to as the leading partner for flue gas systems in Europe.

‘Inspired by history to design the future’

With a combination of experience and young talents we aiming for optimum results every day. Whether it involves innovative product development or consistent production and delivery. We will not be held back by existing borders and we operate from establishments that are to be found all over Europe.


Ontop B.V. was founded in 1965, and has grown into a company with over 200 employees and four establishments. Our head office is based in Middelburg, the Netherlands. In addition, we have plants in Wiewiórczyn (Poland), Champs-sur-Marne (France) and Wiehl (Germany).


In addition to products that are made to order, Ontop has 4,000 products ready in stock. Under the name of Metaloterm we produce single wall, twin wall and concentric chimneys, silencers, elbows, tees and various elements and accessories. The systems are compatible and easy to assemble. Check out our wide range

‘Choose simple but efficient when it gets complicated and challenging’


Ontop has been part of the Schiedel Group since 2016. Schiedel, a Standard Industries company, is a leader in flue-ducting, integrated stove and ventilation solutions and is headquartered in Nussbach (Austria). Learn more at www.schiedel.com and www.standardindustries.com.

years Ontop


Ontop B.V. at ISH 2019

Ontop B.V. showcases flue gas systems at ISH 2019 in Messe, Frankfurt.

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Rais chooses the quality and design of Metaloterm!

Rais stoves and inserts stand for Danish design of the highest quality. And recently they have added chimney tubes to their collection. Ontop developed a special product line for Rais in the colours black, white, nickel, silver, mocha and platinum.

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Will you visit ISH 2019?

We are delighted to invite you to visit us on Messe Frankfurt in the Hall 11.1, E51 of the ISH Fair.

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Flues and Beyond


Ontop B.V. | Metaloterm
Oude Veerseweg 23
4332 SH Middelburg

T: +31 (0)118 68 99 00
F: +31 (0)118 68 99 99
E info.nl@metaloterm.com

KvK-number: 22019262

VAT-number.: NL 001742887B01

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Ontop B.V. | Metaloterm

Metaloterm® is a trademark of Ontop B.V.