National concerns about air pollution are growing. The importance of indoor air quality is emerging because people live in an indoor environment more than 90% of the day. In particular, the indoor air quality of schools needs to be managed as teenagers are vulnerable to environmental pollution. The government has designated the School Health Act in order to manage indoor air quality in schools. Air purifiers have been operated to improve indoor air quality in the classroom since 2018. In this study, we performed on-site evaluations in some classrooms, and then we proposed a plan for improving the air quality in the classroom. In this study, PM10, PM2.5, and CO2 in classrooms in Chungnam were measured to analyze the effect of air cleaner supply. A portable aerosol spectrometer (PAS, model 1.109, Grimm) and CO2 meter (TES 1370, TES) were used as measuring instruments. Schools A and B exceeded the recommended standards, while school C met the standards. The ratio of PM10, PM2.5 in classrooms A and B was 0.58 and 0.5, respectively. Correlation analysis was performed between indoor and outdoor pollutants to analyze the effects of particulate pollutants present in each classroom. First, the measured concentration of fine particles was classified according to/on the basis of factors that affect/influence the internal environment of the classroom. Then, fine dust concentrations measured at the same time as AQMS were classified with regard to the external factors. The gradients for each classroom were 1.57, 1.63, and 1.54, although there were differences in concentration, but they were relatively similar. It is necessary to develop and disseminate customized air purifiers considering the activity of the occupants of classrooms. It is important to consider the areas in which s tudents breathe when installing air purifiers in the classroom. In addition, follow-up management of air purifiers is an essential element. For efficient operation and management of indoor air quality, it is necessary to develop and disseminate standard manuals for air purifiers. It is proposed that an environmental manager should be deployed in schools to manage environmental issues. Standardization of air purifiers, management guidelines for standard manuals, and field support for environmental sheriffs should be established on a legal basis.

Abstract
1. 서 론
2. 이론적 배경
    2.1 학교 교실의 공기질 관리 현황
    2.2 학교 고농도 미세먼지 대책
    2.3 학교 공기청정기 등 설치 및 운영에 관한 고시
3. 공기청정기 보급에 따른 영향 조사
    3.1 조사대상 및 측정항목 선정
    3.2 측정기기 및 일정
    3.3 교실별 실내오염물질 농도 변화
4. 학교 실내공기질 관리현황 분석 결과
    4.1. 재실자의 활동도를 고려하지 않은 농도관리와유지기준 초과 여부만을 중심으로 하는 연구(과제) 수행
    4.2. 상용 공기청정기 적용에 따른 단가상승 및 유지관리 어려움 발생
    4.3. 학생들의 호흡영역을 고려하지 않은 배출구
    4.4. 환기나 공조설비를 고려하지 않은 공기정화장치위주의 개선대책
    4.5. 비전문가에 의한 상황판단 및 개선대책 수립
5. 결 론
    5.1. 재실자의 활동도를 고려한 맞춤형 공기정화장치개발 및 보급
    5.2. 효율적인 실내공기질 운영관리를 위한 표준메뉴얼 개발 및 보급
    5.3. 환경보안관(가칭)을 통한 환경진단 및 개선방안도출
    5.4. 관리규정 정비
References

• 노수진(연세대 환경공해연구소) | Sujin Noh (Institute for Environmental Research, Yonsei University)
• 윤수향(충남연구원 서해안기후환경연구소) | Soo Hyang Yoon (Seahaean Research Institute, ChungNam Institute)
• 황은영(충남연구원 서해안기후환경연구소) | Eun Young Hwang (Seahaean Research Institute, ChungNam Institute)
• 이선엽(충남연구원 서해안기후환경연구소) | Seonyeop Lee (Seahaean Research Institute, ChungNam Institute)
• 이상신(충남연구원 서해안기후환경연구소) | Sang Sin Lee (Seahaean Research Institute, ChungNam Institute)
• 김종범(충남연구원 서해안기후환경연구소) | Jong Bum Kim (Seahaean Research Institute, ChungNam Institute) Corresponding Author