Bringing the street into the lab


MAHLE climatic wind tunnel

As the leading international OEM of vehicle air conditioning and engine cooling systems, we not only invest in research and development of our own products, but also provide our customers with comprehensive development services.

Our climatic wind tunnels in Stuttgart/Germany and Troy, Michigan/USA as well as our cooling wind tunnel in Stuttgart provide realistic conditions for measurement and testing without elaborate road testing. They provide a reliable basis for a smooth technology transfer, quality management, cost reduction, and time savings—all in the interest of our customers.

Since 1936, we have been employing wind tunnels in the development of thermal management solutions for passenger cars, commercial vehicles, and off-highway applications. In the year 2000, an entirely new climatic wind tunnel was added in Stuttgart-Feuerbach, setting new standards. This was followed in 2004 by the even more powerful Troy wind tunnel in the Troy Tech Center in Michigan.

Each MAHLE climatic wind tunnel is designed to allow unproblematic testing for a wide range of applications and a large number of measurements to be performed reproducibly.


  • Automobile manufacturers/suppliers
  • Commercial vehicle manufacturers/suppliers
  • Agricultural machinery
  • Outdoor work machinery and equipment (chain saws, ticket machines, etc.)
  • Insurances
  • TÜV/Dekra
  • Defense industry


  • Climate control systems, heaters
  • Weather stations
  • Wind/solar energy, power generation
  • Sports equipment and accessories
  • Cooling/heating insulation
  • Chemical industry (paints, varnishes, etc.)


  • Comparison of air conditioners
  • Testing and evaluation of components in cooling and heating circulation
  • Design and testing of engine cooling components
  • Tuning of climate control systems
  • Testing of channel and nozzle concepts
  • Evaluation of thermal comfort within the vehicle (e.g., using the MARCO thermal dummy)
  • Acceptance measurements by local approval authorities



  • Cooling curves to meet any specification
  • Heating measurements to meet any specification
  • Filling optimization in the cooling circuit
  • Stability and acoustic testing in the cooling circuit
  • Fuel consumption measurements in driving cycles such as MVEG and SC03, using a driving robot
  • Defrost and demist measurements, such as to ECE or FMVSS standards (acceptance measurements)
  • Climate control tests
  • Evaluation of interior acoustics