Dr. Maciej Mijakowski is an Assistant Professor in the Faculty of Environmental Engineering at the Warsaw University of Technology, Poland. He completed his Ph.D. in Environmental Engineering at the Warsaw University of Technology from 1997 to 2002. He is also the president of the Energy Conservation Foundation, member of the board of the International Building Performance Simulation Association Poland and the Association of Energy Auditors, expert for the National Energy Conservation Agency, and a specialist in the field of energy-efficient solutions in construction (with particular emphasis on ventilation and air conditioning) and industry (cooling energy, heat recovery).