About us
Precision is our passion
Since 1999, we have been manufacturing components for large ventilation systems — from a local craft workshop to a specialist company that is in demand throughout Europe.
Corporate values
That is what we stand for as a company.
Reliability
We can be counted on — we keep what we promise and rely on sustainable, cooperative partnerships.
Quality
Unique quality in the production of our solutions — and investment in the future through thorough training.
Responsibility
We take responsibility for our employees and our environment — sustainably, in the interest of a resource-rich future.
Our history
From 23 employees to specialists
1999
The founding by Hermann Hennen
The qualified engineer Hermann Hennen founded BLH GmbH with initially 23 employees to serve the local market for ventilation technology.
2005
Expansion and relocation to Pfalzel
With almost 50 employees, the rented hall is becoming too cramped. The new building on the green meadow improves the workflow and creates space for future expansions.
2016
Change in management
Hermann Hennen is retiring; Oliver Hennen takes over the management. At the same time, the SIG Air Handling Group becomes a partner.
2019
20th anniversary
With over 90 employees and activity across Europe, BLH has positioned itself as one of the leading suppliers of metal ventilation products.
2020
Construction of the new hall
To meet the strong demand for individual special constructions, a new production hall with 2,000 m² is being built — equipped with modern CNC machines and welding workstations.
2020
Part of the Airvance Group
The Europe-wide active family business Airvance Group acquires the SIG Air Handling Group and subsequently BLH as well. This way we benefit from corporate structures and remain close to the local customer needs.
Our location
Buildings & Halls
On our premises in Trier-Pfalzel, we manufacture on an area of over 5,500 m², using modern CNC machines and welding workstations.
INTERNATIONALLY CONNECTED
Part of the Airvance Group
BLH has been part of the internationally operating Airvance Group since 2020. This combines the short distances and local expertise of our location in Trier with the capabilities and strength of a group with around 3,000 employees worldwide.
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Contact
Let's talk about your project.
Schedule an appointment with us now – Ventilation with a system
Whether it’s an initial idea or a concrete project – we will advise you personally and together find the appropriate solution. Within two working days, we will get back to you.