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[Display omitted] Sustainable Development Goal #7 calls for "access to affordable, reliable, sustainable and modern energy for all." Scientific evidence is growing that greenhouse-gas emissions have a noticeable effect on the earth's climate. Many purpose-built post-war social housing estates in Europe that form high-density residential-tower blocks, however, do not meet current stringent energy-efficiency standards. As a result, many of these structures are under threat of overheating and require careful planning to implement holistic energy subsidisation schemes. This article presents a setup of building energy performance framework that was developed according to the in-situ measurements of building-fabric thermal structure to asset robust energy performance evaluation and certification schemes in the residential sector. This empirical study examines social householders' electricity reliability in accordance with assessing overheating risk of housing stock in South-eastern Europe where the weather is subtropical (Csa) and partly semi-arid (Bsh). It also investigates the gap between as-designed and as-built energy performances. The findings for thermal anomalies resulted from air infiltration through the building fabric, and a lack of natural ventilation through living spaces and excessive heat gains through sizeable and glazed areas. On a typical hot summer day, the internal temperatures of the simulated condominiums remained high throughout the day and night, ranging from a minimum 28.5 °C to a maximum 36.5 °C. Insights from this empirical study improve the national energy network and subsidisation schemes in Europe. The energy policy and regulations would benefit from conceptual level analysis and planning prioritisation in accordance with the climate characteristics of each EU-27-member state. [ABSTRACT FROM AUTHOR]

• A trans -scalar analysis of architectural issues relating to passive solar heating through glazing. • A global estimation of the potential for passive solar heating in Europe. • A multi-criteria comparative analysis of the efficiency of different types of glazing. • An investigation of the carbon and energy payback times according to the properties of glazing. • An economic analysis using a novel method based on the levelized cost of energy. Glazing transparency provides buildings with valuable solar energy during periods of colder weather, thus contributing to the mitigation of climate change. However, this same transparency also leads to heat loss which can offset heat gains. Although the use of insulated glazing addresses this challenge by multiplying the number of glass panes, at the same time it reduces the solar factor and thus the heating potential. This article aims to estimate the potential for passive solar heating in Europe according to the energy performance of glazing. This potential is undoubtedly a valuable resource for sustainable architecture. However, an analysis based on regional weather conditions shows a wide disparity in the energy savings that can be expected from a south-facing facade. These savings are most often well below a building's average energy consumption and so a balance has to be found between the thermal resistance and the solar factor of glazing. In addition, the carbon footprint and cost of the most efficient glazing can considerably extend the environmental and economic payback time of a retrofit. This research shows that the potential for passive solar heating is significant but only as long as each architectural situation is analysed according to its specific context and function. This potential would be even greater if windows were designed and used as adjustable facade elements to suit variations in weather and use. [ABSTRACT FROM AUTHOR]