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INVESTIGATION ON INDOOR THERMAL ENVIRONMENT OF THE GERS IN ULAANBAATAR DURING WINTER

In this study, we clarified the indoor environment of traditional dwellings of the gers in Ulaanbaatar, Mongolia through questionnaires and measurement. Questionnaires were conducted for 59 gers and 10 of them were selected for measuring indoor air temperature, relative humidity, and CO2 concentration. The ventilation rate estimation of the gers was based on the indoor CO2 concentration during 4:00 6:00 when the ventilation rate was most stable. Indoor air temperatures of the gers change significantly throughout the day. The indoor environment of the gers is uncomfortable according to the ISO7730 standard due to high or low air temperature and low relative humidity. The heat loss coefficient of the gers is between 1.31 W/(m2K) and 3.96 W/(m2K) based on coal consumption in the gers.