Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

The minimum performance standard of ventilation systems defined in the Rules on Equipment Standards for Buildings, etc. is 0.5 air change per hour. Since this standard is for all households, it can be seen that the doors of all rooms are open, when the doors of the rooms are closed, the appropriate ventilation amount could vary. In addition, the appropriate ventilation amount can be calculated from the number of occupants and the external CO₂ levels, and the external CO₂ levels has been increasing since the measurement in 1984. The ventilation systems applied to apartment houses generally provide the same amount of air to all households. This inevitably causes differences in air quality for each space depending on the difference in the infiltration rate or the number of occupants for each room. Therefore, two rooms with different infiltration rates were selected from the apartment house, and the CO₂ removal rates according to the number of occupants and various ventilation rates were experimentally analyzed, and basic research was conducted to effectively operate the ventilation system for the apartment house.