28.01.2026
Technology and Knowledge
Tailor Made Solutions in the Renovation Sector
Project Report on Office Renovation in France and Belgium
In today’s world, where sustainability and energy efficiency are becoming increasingly important, the renovation of buildings plays a crucial role. Especially in the field of heating, ventilation and air conditioning technology, tailor made solutions are required—solutions that seamlessly integrate into existing architectural and structural conditions.
Kampmann’s expertise lies precisely at this intersection: customised concepts that not only meet the latest technical standards but are also perfectly aligned with the specific requirements and spatial characteristics of each project.
The following presents two renovation projects: the Marnix Building in Brussels and the NEXT office building in Lyon—two examples demonstrating how demanding refurbishment projects can be successfully implemented using tailor made solutions.
Sustainable Renovation of ING-Bank in Brussels
The Marnix Building, headquarters of ING Bank in Brussels, was built in 1964 and has undergone extensive revitalisation in recent years. Today, it is regarded as a flagship project for energy efficiency and environmental performance, having been awarded the BREEAM Interim Certificate “Outstanding” – the highest possible rating under international sustainability standards. This makes the Marnix Building one of the leading reference projects in sustainable refurbishment.
A key focus of the renovation was the consistent reuse of existing materials, as well as the selection of sustainable new materials. This was complemented by numerous energy efficient measures: photovoltaic modules for renewable energy generation, an almost fully green roof, new triple glazed windows and an underground reservoir capable of collecting up to 200 m³ of rainwater for sanitary and cooling purposes. In addition, more than 9,940 m² of old carpet tiles were recycled, and a special façade treatment actively contributes to improved air quality.
Over 1,800 Katherm HK trench system
Kampmann also made a significant contribution to the building’s sustainable overall concept. In total, over 1,800 Katherm HK trench system were installed in the Marnix Building—representing a total length of almost two kilometres. The units installed were 340 × 165 mm in size, in a 4 pipe configuration, equipped with natural aluminium roll up grilles designed for the connection of fresh air. Depending on requirements, the units were fitted with one or two primary air nozzles.
The maximum trench length was limited to 1,050 mm by the project specifications and was implemented accordingly. Alongside the predefined unit size, both a defined maximum sound power level and the required cooling capacity played a central role in the planning. The units were therefore supplied in electromechanical design, featuring factory mounted valve kits with extended flow and return connections to ensure fast and secure installation.
This solution proved ideal for the project, as the installation of technical building equipment in the ceilings was not feasible from a structural perspective. The trench system nevertheless ensure efficient air conditioning without compromising the architecture or the floor to ceiling glazing. A protective installation cover ensured the units remained undamaged until commissioning. This preserves both the unobstructed view and the high design standards of the building.
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Renovation of the NEXT Building in Lyon
The NEXT office building in Lyon, originally constructed in the 1990s, has been completely renovated as part of an extensive redevelopment programme. Covering a total of 15.800 square metres, it now offers modernised co working spaces, spacious meeting rooms and a diverse range of dining options on the ground floor. At the heart of the building is an open courtyard.
The seventh floor posed particular technical challenges due to its lower ceiling height compared to the other floors. This required specialised heating and cooling solutions. Thanks to their flexible construction, Kampmann’s trench systems can be discreetly integrated into the existing architecture — even under these challenging conditions.
100 Katherm HK units with fresh-air connection
To ensure efficient climate control, around 100 Katherm HK units with fresh air connection were installed. The 13 cm high units are equipped with robust special supports for 40 cm raised technical floors and feature hydraulic control via 6 way valves with integrated flow measurement. Demand controlled ventilation is managed through variable air flaps combined with occupancy sensors in all rooms, integrated into a modern full IP building control system.
The redevelopment of the NEXT Building meets the following standards:
- Certification HQE BD (niveau excellent)
- Certification BREEAM (RFO 2015 – niveau excellent)
- Label R2S 2*
- Label BBC A Rénovation
- Label Biodivercity – niveau base
- Label Osmoz – levier bâti
NEXT Lyon was awarded the bronze medal at the national “Clés d’Or” competition and is more than just a building: it is a strong statement for the low carbon sector.
Trench Technology
Duct systems are a modern solution for room climate control, especially for large glass facades and floor-to-ceiling windows. Installed flush with the floor, they provide effective cold air shielding and ensure a comfortable room climate with an unobstructed view.
Are you planning your own renovation project?
Sustainable building renovation, energy efficient technology and high indoor comfort can go hand in hand. Even complex challenges — such as limited ceiling heights, high aesthetic demands or the integration of modern technologies into historic structures — can be successfully overcome with tailored concepts. We would be happy to support you in designing your spaces efficiently, sustainably and future ready.
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