**3. Results**

The objective of this section is to compare the thermal performances of different glazings using simulation tools and real data. The heat transfer coefficients (*hg, hw*) define convective heat transfer mechanisms of the air and water chambers. Optics and Window software tools were used to validate the absorptance and transmittance of commercial glass panes [41]. Optics allows analyzing the spectral properties at normal incidence, whereas Window considers spectral properties of glazing using different angles of incidence. In order to validate the simulation of the complete thermal problem, isolated glazing was considered. The assumption that indoor air temperature was constant and diffuse indoor irradiance was zero simplified the problem. Two different cases were tested: steady and transient boundary conditions.
