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2. EU, Directive 2002/91/EC of 16 December 2002 on the energy performance of buildings. , 2002 (accessed 25.03.12).
3. Decree Law no. 78/2006, National system for energy and indoor air quality certification of buildings (SCE in Portuguese), 2006.
4. Decree Law no. 80/2006, Regulation of the buildings thermal behavior characteristics (RCCTE in Portuguese), 2006.
5. Decree Law no. 80/2006, Regulation of the energy systems in buildings (RSECE in Portuguese), 2006.