Abstract: Finding new ways to reduce conventional fuel consumption is centered on renewable energy using solar, wind, water, geothermal and biofuels. Passive technologies, which do not require external power, are particularly important. In the construction industry for this purpose are used various types of window blinds, awnings and shutters. A similar effect is achieved through the use of appropriate facade, natural and artificial coverings. Façade paints with desirable absorption-emission properties are also included in this group. With the same type of façade trim, the color of the façade is influenced by the factor that affects the energy consumption for heating or cooling. It is observed that dark colors are better able to absorb radiation compared to bright ones. In the previous design calculations, only the black, white and gray shades are usually distinguished. It seems that this scale is not sufficient for accurate calculations of heat gains and losses. This paper presents the results of investigations of the heating of aluminum samples of equal dimensions, which have been painted with façade paint of different colors. The study was conducted on a specially designed test bench where the change in the temperature of the heated and then the sample was measured over time. They showed that the surface painted with white paint generates heat gains of 18% less than green and 29% from black, which translates into reduced radiation gains. These results are the basis for determining the desired absorption and emission factors.
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