Proceedings of COST TU1205 Symposium-Combined with EURO ELECS 2015 Conference, Guimarães, Portugal. 1 COST Action TU1205 (BISTS) Building Integration of Solar Thermal Systems Proceedings of COST Action TU1205 Symposium Combined with EURO ELECS 2015 Conference, Guimarães, Portugal © COST Office, 2015. No permission to reproduce or utilise the contents of this book by any means is necessary, other than in the case of images, diagrams or other material from other copyright holders. In such cases, permission of the copyright holders is required. Neither the COST office nor any person acting on its behalf is responsible for the use which might be made of the information contained in this publication. The COST Office is not responsible for the external websites referred in this publication. Edited by: Soteris A. Kalogirou This book may be cited as: Proceedings of COST Action TU1205 Symposium ISBN: 978-9963-697-17-5 Publication date: July 2015