Ventilated Double Window for the Preheating of the Ventilation Air Comparison of Its Performance in a Northern and a Southern European Climate

<table>Heat gain and temperature of the incoming air in function of the solar irradiance, for air flow rates of 25 m<sup>3</sup>/h and 75 m<sup>3</sup>/h and an outdoor air temperature of 0°C.</table>

Journal of Renewable Energy

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Figure 4

Figure 4: Ventilated Double Window for the Preheating of the Ventilation Air Comparison of Its Performance in a Northern and a Southern European Climate 

Figure 4 | Ventilated Double Window for the Preheating of the Ventilation Air Comparison of Its Performance in a Northern and a Southern European Climate 