With the Phase Control system, the air is humidified by atomization bymultipleevaporation sources - strategically dispersed in the longitudinal direction ofthe house, inthe top of the greenhouse above the crop - for maximum air humidification formaximum cooling.Dry air from the outside is constantly mechanically supplied in largequantities andthe humid air is removed to allow evaporation and cooling to continue at ahigh leveland to maintain a great cooling capacity.The cooled, humid air is mechanically transported over a trajectory of optimallength.Not as in the case of air humidification, where air is not mechanicallytransported at all.And not as with the Pad & Fan system, where the air is transported over toolong atrajectory.The supplied air can first be cooled and dried by a heat pump and theextracted heatcan be stored in a heat storage tank and used for heating the greenhouse.The system can also be executed closed. Where at the end of the trajectory ofairdisplacement the air in a closed circuit is transported back to the heat pumpand wherethe water (vapor) in the air is used as a medium for cooling and heattransportation.