To control the incidence of the sun in the windows have shutters installed. The main advantage of these off the external blinds , is that they allow for greater ventilation improving energy performance. The most versatile and practices are slat shutters mobile, which can alter the tilt of the slats, modulating the entry of sunlight in the home. However, due to the higher cost and lower security of the latter, we have opted for fixed-slat shutters.
The slope (between 15 º and 20 º) and the distance between the slats, is calculated to facilitate the entry of light in winter, when the sun is lower. ; At the same time preventing the entry of sun in summer when higher, as shown in the image on the left. These calculations were made taking into account the geographic location of the house, orientation and width of the slats, so the tilt of the slats and the distance between them is different in different facades Majorcan home. Having more lean in the south façade and more distance between the slats of the northwest facade. 
