The paper focuses the measurements of heat losses and solar gains of the Kunerts glazing compared to the ordinary insulating double glazing under actual climate condition in Slovakia. Both sample of glazing have the same thermal transmittance Ug = 1.1 Wm-2 K-1. Measurements were carried out in the Twin-Boxes in location Bratislava. The facade in which the measured samples were installed is oriented to the south. There was a long-term measurement in summer and winter conditions. Technical characteristics of the measured glazing samples and measured values of temperatures, surface temperatures, heat losses or gains, and local climatic conditions measured from the meteorological station located on the roof of the laboratory are described.
