The purpose of the study is to develop circuit solutions for alternative air conditioning systems based on the use of low-temperature air coolers. The authors developed circuit diagrams of such air coolers with a reduced limit of evaporative cooling of media from the temperature of the wet thermometer supplied to the cooling of the air flow to the dew point temperature. Air coolers are designed in separate and combined layout options. In this case, heat - mass transfer apparatus with a movable fluidized bed "gas - liquid - solid" were used as a promising direction for the development of heat and mass transfer equipment (HMT). This ensures stable operation in extreme conditions, when there is a risk of contamination and deposits on the working surfaces of HMT, as well as the intensification of heat and mass exchange processes and high uniformity of distribution of contacting gas and liquid flows in the HMT volume, especially for implementing processes in evaporative air coolers with direct placement of the heat exchanger in the apparatus. An experimental study made it possible to establish the optimal range of effective density of the packed elements for the implementation of heat and mass transfer processes in a movable nozzle, characterized by stability and homogeneity, a wide working area in terms of gas flow rate with a relatively small dynamic layer height. Based on the obtained experimental data, a comparative analysis of air conditioning systems based on a low-temperature evaporative air cooler - chiller is carried out. The developed solutions allow expanding the field of practical use of evaporative cooling methods, for example, providing air comfort parameters in the air conditioning system without involving traditional refrigeration equipment, as well as improving the basic environmental and energy characteristics of the developed systems.