Water scarcity is certainly one of the most relevant and worrying issues of the 21st century, affecting billions of people and limiting their access to safe water. Atmospheric water harvesting technologies have been under research and development for decades now to relieve — and eventually overcome — water scarcity in affected areas. Such technologies have been drawing increasing attention in the last years, due to the possibility of employing renewable energy sources to power the main physical processes involved. This study analyzes the performance of a novel membrane based harvesting unit under various operating conditions and using multiple structural designs. The lab-scale prototype (featuring a single membrane of surface area 160 cm2, active contact area 123.5 cm2) yield was as high as 354 ml/day of water, with an average of 155 ml/day, corresponding to water harvesting rates of 22.13 kg/m2/day and 9.69 kg/m2/day, respectively.