We studied the changes in the concentration of total volatile organic compounds generated in newly-built schools (five kindergarten schools, two primary schools, three middle schools, one high school) by the bake-out. Samples were collected in classrooms. By using the bake-out technique the removal efficiency of total volatile organic compounds was 89.1%(maximum) and 27.5%(minimum). By using this bake-out technique the removal efficiency was 42.5% greater than the ventilation method. Therefore, we determined that it is appropriate to apply both the bake-out and ventilation methods in the case of newly-built schools

In order to evaluate the quality of indoor air due to the remodeling and newly-built in S City, 60 schools wereinvestigated in formaldehyde (HCHO) and total volatile organic compounds (TVOCs). One school exceeded thenational standard of formaldehyde 100µg/m³ at 1st measurement. Thirty-eight schools showed higher level ofTVOCs over 400µg/m³ at 1st measurement. Twelve schools showed higher level of TVOCs over 400µg/m³ at2nd measurement. This result derived from TVOCs which originated from the building materials and finishingmaterials. To prevent the pollution of indoor air quality at schools caused by formaldehyde and TVOCs, therecommendation of environmentally-friendly building materials, the diminishment of emission by bakeout process,the efficient combination of natural ventilation and mechanical ventilation, and antibacterial effect of chemicalcontrol measures as photo-catalysts should be given positive investigation.