In the present work, a conditioning system was simulated based on membrane gas separation technology. The considered system is suitable for the simultaneous monitoring of the following indoor air parameters: oxygen concentration, carbon dioxide concentration. The membrane air conditioning system consists of two membrane modules, one to remove carbon dioxide from the room and the second to maintain the required oxygen level in the room. The effectiveness of using the membrane method for the removal of carbon dioxide formed in the process of human life is shown. It is shown that the use of membrane technologies as part of air conditioning systems helps to reduce the gas consumption necessary for normal human life.