## 1 Introduction
Most studies have been conducted in the Mediterranean climate [15; 16], temperate climate [17; 18; 19; 20], and cold climate conditions [21; 22], summarizing the effect of structural parameters of DSF on thermal performance. For some studies, it was established that corresponding results could provide some reference for the buildings in similar climate regions [22]. The research has been extended to wet conditions [23; 24], arid tropical climate [25; 26], and, more recently, to a combined hot and humid environment [27] or a combined hot and dry climate [28]. In the context of an arid climate, it is argued that the cavity depth should be between 600 and 1000 mm to allow these areas to solve specific problems related to the presence of sand. Regarding the possibility of applying these facades in buildings located in specific climatic conditions of countries like Turkey, a significant reduction in energy consumption for heating in the winter was obtained [29]. [PERSON] et al. [30] studied the difference between a single skin facade and a box double skin facade from a heat transfer point of view, showing an increase in envelope insulation with benefits during the cold season. The mathematical model proposed and the analyses of the heat transfer indicators were described by tabular values and by one year chart for the Brasov region, in Romania. [PERSON] et al. [31] presented numerical modeling of a double skin facade (DSF) combined with a full-scale DSF experimentally studied in summer configuration with different airflow rates through the air channels of the facade and for different angles of the solar shading devices. A recent study [32] investigated the evolution of building energy retrofit via double-skin and responsive facades, to show the development and adaptability to the current NZEB requirements. [PERSON] et al. [33] investigated how constructional features affect the behavior of double skin facades (DSFs). In a review containing nearly 70 scientific articles on mechanically and naturally ventilated DSFs tested in different countries and climates (but none from Romania), it was established that complex interactions between more than one parameter at a time are primarily unexplored. There are studies regarding DSF channel ventilation mode (between the cavity and external glazing openings) using openings on the lateral side of the channel. To avoid the overheating of the channel, the horizontal ventilation was studied experimentally [34] and numerically [35] or a supplementary lateral opening was adopted on the external glazing of the DSF [36]. This one can be a solution applied to enhance the wind-induced cavity natural ventilation using pressure differential. However, there are very few buildings in which double-skin facades have actually been fully realized in Romania and little experience of the system behavior in operation. Furthermore, the specific climatic conditions of continental temperate are characterized by warm summers and cold winters, and these conditions differ from climates where DSFs have been widely applied. In this study, an experimental analysis of double skin ventilated facade was conducted in the specific climate conditions of Romania, in July and November, for different strategies of ventilation in order to determine the thermodynamic behavior and performance assessment in terms of pre-heating efficiency during the cold season and the dynamic insulation efficiency during the hot one. This study aims to reflect on strategies for DSF that are responsive to the particular climate type. Moreover, in the hot season of the temperate climate, the combination of the vertical openings on the top of the ventilated channel with the lateral ones on the exterior glazing of the DSF is proposed.