Abstract: The invention relates a method for air conditioning of an IT environment which comprises hardware IT devices, computers, memories, telecommunication devices and peripheral devices, wherein a refrigeration supply system of the IT environment has a free cooler, refrigerators and an air circulation system which is operated by means of fans and contains heat exchangers for drawing off the heat generated by the hardware, wherein the method includes the following steps: determining a basic desired value for the feed air temperature of the IT environment on the basis of the existing hardware-configuration, measuring at least one parameter of the hardware which represents a disturbance variable which has a direct or indirect effect on the feed air temperature, and storing the measured value of the parameter, ascertaining a desired value for the feed air temperature from the measured parameter value of the hardware, and raising the target value for the feed air temperature until a critical parameter value is measured,

Abstract: The invention relates a method for air conditioning of an IT environment which comprises hardware IT devices, computers, memories, telecommunication devices and peripheral devices, wherein a refrigeration supply system of the IT environment has a free cooler, refrigerators and an air circulation system which is operated by means of fans and contains heat exchangers for drawing off the heat generated by the hardware, wherein the method includes the following steps: determining a basic desired value for the feed air temperature of the IT environment on the basis of the existing hardware-configuration, measuring at least one parameter of the hardware which represents a disturbance variable which has a direct or indirect effect on the feed air temperature, and storing the measured value of the parameter, ascertaining a desired value for the feed air temperature from the measured parameter value of the hardware, and raising the target value for the feed air temperature until a critical parameter value is measured,

Abstract: An air conditioning system for a data processing system that has at least one row of server cabinets. The row of server cabinets borders a cold path. At least one air conditioning unit takes in warm air, cools it, and blows it out as cold air. The air conditioning unit is integrated into a row of server cabinets and the dimensions of the air conditioning unit and the dimensions of the server cabinets are essentially the same or, while having the same height and depth, the width of the air conditioning unit corresponds to a whole-number multiple of a width of one server cabinet. The air conditioning system can be used to produce an effective cooling concept for temperature-sensitive data processing systems, which influences the immediate surroundings only slightly with warm air. The modular construction allows the cooling capacity to be scaled, also making it possible to carry out a subsequent expansion.