%0 Journal Article %T Ventilated Double Window for the Preheating of the Ventilation Air Comparison of Its Performance in a Northern and a Southern European Climate %A Jorge S. Carlos %A Helena Corvacho %J Journal of Renewable Energy %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/290865 %U http://dx.doi.org/10.1155/2013/290865