Effects of Flush-out Air Temperature on Reducing Indoor Air Pollutants in Newly Built Residential Buildings

In this study, the effect of flush-out temperature on indoor pollutant reduction was studied in a thermal environment chamber, whose design resembles that of a residential building. The results of this study and those of previous studies were compared. The measurement was carried out at 11°C and 16°C following a 6-day flush-out at. Consequently, the pollutants decreased by compared to 56% ~ 78% in previous studies. The flush-out had a reduction effect on the pollutants even at low temperatures. When compared with field measurement results, the effect of the pollutants reduced by flush-out temperature was different; however, it was confirmed that the flush-out has some effect of reducing pollutants even at low temperatures. By comparing the current results with those of field and chamber experiments conducted in previous studies with a t-test, the p-value was 0.05 or higher, indicating that the number of temperature-induced ventilations in the entire dataset was not a significant factor in the pollutant reduction effect. Therefore, based on the t-test analysis results of pollutant reduction effect by temperature, it was confirmed that the higher the temperature, the greater the pollutant reduction effect, 13% to 80%. The difference in the reduction effect by temperature varied for each pollutant.