In this study, a novel procedure for calibrating the thermal response of a naturally ventilated single-family building with DesignBuilder (EnergyPlus) software is presented. From mid-April to mid-July 2020, I performed measurements of dry-bulb temperatures and wall surface temperatures, based on which I performed the calibration. With the calibrated model I managed to predict the actual building thermal response, with an accuracy of ± 1 °C in 71.6 % and ± 2 °C in 98.4 % of the time. Based on historical meteorological data from 1982 to 1999, I then produced future climate projections for the city of Ljubljana for the periods: 2011–2040, 2041–2070, and 2071–2100. Next, I analyzed the impact that the changing climate will have on the building model thermal response, while also analyzing various building adaptations and organizational efforts as passive cooling methods. I found that organizational efforts function very well as passive cooling solutions, while building adaptations are not quite as effective in this regard. Shading is only effective in the first future period, while night ventilation is recomended in all three periods. The latter can however lead to overcooling of the building, especialy in the first future period. Of the considered building adaptations, the most suitable for mitigating the overheating phenomenon are: adaptation with additional external blinds, adaptation with lower solar absorbtivity of roof tiles, and adaptation with increased thermal mass in the building envelope. To mitigate the building overcooling problem during night ventilation, it is recommended to increase the thermal resitance of the building envelope.
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