In order to depict a wider overview of these techniques impact
on the energy performances a number of variables are taken into
account. A number of building variants are, hence, defined and the
cooling and heating demands are calculated for each of them. The comparison is carried out for the net energy, without considering
the energy systems efficiencies, since the main objective is the
optimisation of the envelope energy performances. The variants
considered in the analysis are described in the next paragraphs.