The paper presents actual knowledge concerning the indirect evaporative cooling (IEC). This cooling technology is promising to develop in the near future due to its very low energy consumption and high efficiency in its range of applications. The review is presenting in details: theory, working principles, flow and construction. The IEC equipment and technology is suitable in different air conditioning applications: commercial, industrial, residential or data centres. The IEC technology is completely environmental friendly and has very low global warming impact. The single disadvantage of IEC is the water consumption

SThe paper presents a review of indirect evaporative cooling (IEC) operating conditions and performances. This cooling technology is promising to develop in the near future due to its very low energy consumption and high efficiency in its range of applications. The review is presenting in details: operating conditions and performances. Having very low energy consumption comparing to classic cooling, the IEC technology is environmental friendly and has very low global warming impact. The single disadvantage of IEC is the water consumption. The review also includes a study concerning the limits of IEC for different locations world-wide

The study presents a complex evaluation of the indirect evaporation cooling technology potential to reduce the energy consumption of the fresh air conditioning system, of an office building in the climatic conditions of Cluj-Napoca, Romania. The study was realized for the cooling season of one year based multiannual values of ambient temperature and relative humidity. It was considered two types of fresh air conditioning systems. The classic system was considered composed of a cooling battery powered by an electric chiller and the evaporative system was considered composed by a recuperative heat exchanger, indirect evaporative cooling equipment and the same classic cooling battery. It was found that the fresh air cooling period starts in May and ends in September. The performances of the two air conditioning technologies were compared and it was concluded that the evaporative system allowed the reduction of energy consumption for the fresh air cooling with almost 80%