samhe_full_year_report_23_24-f7436456cdd332c1.pdf

This report presents findings from the Schools’ Air quality Monitoring for Health and Education (SAMHE) initiative for the 2023/2024 academic year. Based on data from hundreds of UK schools, the report examines the relationship between outdoor temperatures and indoor air quality, specifically focusing on carbon dioxide (CO2), relative humidity, and particulate matter (PM2.5).

• The SAMHE initiative has deployed air quality monitors to over 1,300 schools; as of July 2024, it receives data from approximately 750 monitors located in about 430 schools.
• Indoor temperatures in classrooms remained relatively consistent throughout the academic year, likely due to heating during colder months, though an upward trajectory was noted when outdoor temperatures exceeded 23°C.
• Carbon dioxide (CO2) concentrations in classrooms were lower during warmer weather and increased during cooler winter months, suggesting that the desire to keep classrooms warm during cold weather acts as a barrier to adequate ventilation.
• During colder periods, some classrooms exceeded the Department for Education's BB101 guideline value of 1,500 ppm for daily average CO2 concentrations.
• Classroom relative humidity levels appear to be primarily influenced by outdoor weather conditions rather than the breathing of occupants.
• Daily mean PM2.5 concentrations generally remained between 2-6 µg/m3, which is below the World Health Organization's recommended maximum daily mean value of 15 µg/m3.
• Indoor PM2.5 levels are influenced by both internal school activities and regional or national concentrations, as evidenced by indoor spikes that largely follow the trends of the Government’s national monitoring network (AURN).

APA

Stockholm Environment Institute (n.d.). samhe_full_year_report_23_24-f7436456cdd332c1.pdf. https://samhe.org.uk/resources/SAMHE_Full_Year_Report_23_24.pdf

Chicago

Stockholm Environment Institute. samhe_full_year_report_23_24-f7436456cdd332c1.pdf. n.d. https://samhe.org.uk/resources/SAMHE_Full_Year_Report_23_24.pdf.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=samhe_full_year_report_23_24-f7436456cdd332c1.pdf |url=https://samhe.org.uk/resources/SAMHE_Full_Year_Report_23_24.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendsamhefullyearreport2324f7436456cdd332c1pdf, author = {{Stockholm Environment Institute}}, title = {{samhe\_full\_year\_report\_23\_24-f7436456cdd332c1.pdf}}, institution = {Stockholm Environment Institute}, url = {https://samhe.org.uk/resources/SAMHE_Full_Year_Report_23_24.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }