He is the editor in chief of the Advances in Building Energy Research and associate editor of Solar Energy. He sits on the editorial boards of the International Journal of Solar Energy, Energy and Buildings, the International Journal of Sustainable Energy, and the International Journal of Ventilation. He is editor of the book series Buildings, Energy and Solar Technologies published by James and James in London. He has published nine international books on topics related to solar energy and energy conservation in buildings. He is guest editor of eight special issues of various scientific journals. He has coordinated many international research programs and is author of almost 135 scientific papers published in international scientific journals. He is currently visiting professor at London Metropolitan University.