The typical room used for the studies is a standard cross ventilated classroom, 7 x 7 x 2.7 m. The external concrete wall are 16cm thick with three windows for each facades (see Figure 3). Different values of porosity (percentage of openings with regard to the facade) to quantify the

impact on the autonomy in natural lighting. Two azimuths have been considered for the main facades : North and South then East and West

Only a overhang solar shading type has been considered. The TMY weather file used is the one from Saint Pierre, a town located in the south of La Reunion.

The classroom has been divided into three equal strips. The daylight factor and the illuminance level have been calculated for each strip.