Key Words CO2 concentration E Indoor air quality EMaintenance

buildings E Ventilation behaviour This research investigated resident behaviours in rela-tion to kitchen ventilation in residential buildings in order to improve kitchen indoor air quality (IAQ) in South Korean living spaces. The research involved a survey study of 182 households, which identified resident behaviour with respect to ventilation, their satisfaction level regarding the IAQ, and their use and maintenance of range hoods in the kitchens. This paper describes the kitchen CO2 concentrations with both natural and mechanical ventilation. The adequacy of the ventilation behaviour was determined by monitor-ing the CO2 concentration and ventilation behaviours in 10 sampled households of residential buildings. The results showed that natural ventilation was conducted for less than 20min once a day and that 23.3 % of respondents used both natural ventilation and mechan-ical ventilators. Moreover, the results demonstrated that mechanical ventilators were not properly main-tained. In addition, the average CO2 concentration was greater than 1000ppm during cooking, and natural ventilation was more effective than were mechanical ventilators. Most residents performed inadequate kitch-en ventilation to achieve comfortable IAQ. This study suggests ways to improve the ventilation behaviours of residents. The findings of this research should aid in the development of IAQ standards for Korean residential buildings and may contribute to the establishment of ventilation guidelines