Klaus Usemann passed away

Professor Klaus W. Usemann passed away on March 10th, 2013. We have lost a colleague of high reputation, a friend and a shining example in engineering.
Hewas over many decades “the engineer” in building services. He combined practical experience with scientific approach. He served in various functions in VDI, he was in the chair of numerous committees, he for decades was the German delegate to REHVA. His contributions and achievements were appreciated and acknowledged. He was awarded with the Hermann Rietschel Honorary Medal for building services engineering, with the Euler Medal for electrical engineering and with the REHVA Gold Medal. We shall miss him.