AbstractFunctioning of industrial buildings is impossible without correctly organized ventilation system. Its work both regulates heat moist mode and the required indoor air purity that is cleaned with the help of air cleaning equipment. To make decision to construct the required air cleaning equipment at the enterprise a comparative economic assessment of various options is likely to be used, but due to the uncertainty factor, the economic analysis does not always allow to give a definite answer. Therefore, it is worthwhile to give additional parameters and to solve a problem of multicriteria optimization to get the best results. The choice of the best variant is supposed to be carried out using Harrington's desirability function. The conducted multicriteria analysis allowed to reveal optimum characteristics of air cleaning equipment, based on the required purification air degree, the geometrical sizes of the equipment and profit ratio while introducing any particular device.