Dr inż. Arkadiusz Węglarz – chief Advisor for Low Emission Economy in The Polish National Energy Conservation Agency, lecturer in The Department of Civil Engineering at Warsaw University of Technology, vice-president of board of Association of Polish Auditors. Co-author of several scientific publications, technical elaborations and press articles about building subjects and energy. Author of several expert reports for: Ministry of Economy, Ministry of Finance, Ministry of Environmental Protection, Chief Inspectorate for Environmental Protection, Polish Energy Grids (PSE), Ministry of Transport and Construction, National Fund for Environmental Protection and Water Management. Project manager and team member in projects realized in the framework of programs: Phare, Save, 5th Framework Program, 6th Framework Program, Intelligent Energy Europe and bilateral programs. Awarded with the Gold Cross of Merit by the President of the Republic of Poland for achievements in the field of energy efficiency in building sector.