Helmut Feustel has a PhD in Mechanical Engineering from Technisch Universitaet Berlin. He worked at LBNL from 1981 to 1999 (as a Staff Scientist since 1983), working on low-flow, energy-efficient fume hoods since 1995. 1977 – 1983    Scientist at Technical University Berlin, Berlin (F.R.G.) 1983 – 1999    Staff Scientist and Principal Investigator at LBL, Berkeley 1999 – 2000    Head of F&E Dept. at Kessler + Luch, Giessen (F.R.G.) (a system's manufacturer) 2000 – 2001    Energy & Safety Consultant, Giessen (F.R.G.) 2001 – present   Professor for Building Services Engineering/HVAC at HTW University of Applied Sciences, Berlin (F.R.G.) 2007 - present     Technical Expert on HVAC for Law-Courts in Germany, Altlandsberg (F.R.G.) Expertise: energy-efficient fume hood