The X-AIR Semi-Closed System uses the proven Airmix ventilator (patented by Van Der Ende Groep) as foundation for the X-AIR Semi-Closed System and has improved the design to strive for an absolute homogeneous climate to stimulate maximum growth according to the Plant Empowerment principles. The air-inlet duct is designed by Dalsem and fitted with two mechanically linked valves. This mechanism enables to switch between ventilation by outside air or above screen air. The ventilation system is fully integrated in the greenhouse cover. The duct is fitted between the glass roof panel and the trellis girder. The screens are adapted to ensure a perfect fit around the duct. The X-AIR Semi-Closed System can be expanded modularly with heat exchangers and/or humidifiers.