DIY #SOLAR AIR #COLLECTOR harvesting 30° C air at outside temperature -3°C . Weather partly cloudy but sunshine coming through. System powered by 5 Volt #Powerbank and harvesting air with 120 mm computer #ventilator. At the moment regulated manually due to still missing electronic regulation device and components. #savetheplanet #solaraircollector #solarliftkollektoren #DIY #everyKWHcounts