This review, first presented at the Lisbon symposium of CIB working commission W67 by the Professor Emeritus of SINTEF, University of Trondheim, relates the conclusions from several studies on the contributions by windows and sunspaces to passive solar results in a tough climate. The economic case for sunspaces in particular has proved to be doubtful. Passive solar methods used in building renovation show promise, however.
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Hans Granum (1987) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: