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 outdoor air temperature, for a constant air flow rate of 50 m<sup>3</sup>/h.</table>

Journal of Renewable Energy

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Figure 3

Figure 3: Ventilated Double Window for the Preheating of the Ventilation Air Comparison of Its Performance in a Northern and a Southern European Climate 

Figure 3 | Ventilated Double Window for the Preheating of the Ventilation Air Comparison of Its Performance in a Northern and a Southern European Climate 