Nilsson, P E, Abel, E, Ekberg, L, Fahlén, P, jagemar, L, Clark, R, Fanger, P O, Fitzner, C, Gunnarsen, L, Nielsen, P V, stoops, J, Trüschel, A & Wargocki, P 2003, Achieving the desired indoor climate : energy efficiency aspects of system design . Studentlitteratur, Lund .