Improving Indoor Environmental Quality in Schools for Enhanced Student Performance
Explore the impact of indoor environmental quality (IEQ) on student well-being and performance in schools. Discover the correlation between CO2 concentration, temperature, ventilation, and pupil/teacher absence. Learn how decision-makers can assess the value of implementing IEQ improvements to enhance the learning environment.
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Presentation Transcript
HB23 Workshop: Indoor environmental quality in schools Prepping decision makers estimating the value of the wider benefits of improved IEQ in classrooms J rn Toftum Technical University of Denmark Title Date DTU 2
We know very well that - Poor classroom environment affects pupil well-being, illness absence, and performance - Technical solutions are available, but at a cost and with implications for energy use How to reach decision makers? Title Date DTU 3
CO2 CONCENTRATION AND PUPIL PERFORMANCE Category I II III IV Outside category 100 95 Performance (%) 90 85 80 75 70 0 500 1000 1500 2000 2500 CO2concentration (ppm) (Wargocki et al. 2020) Title Date DTU 4
TEMPERATURE AND PUPIL PERFORMANCE Category I II III IV Outside kategori 100 95 Performance (%) 90 85 80 75 70 20 21 22 23 24 25 26 27 28 29 30 (Wargocki et al. 2019) Temperature (oC) Title Date DTU 5
VENTILATION AND ILLNESS ABSENCE (Mendell et al. 2013) Title Date DTU
PUPIL PRESENCE (1 ABSENCE) 100 95 Presence (%) 90 85 80 75 70 0 500 1000 1500 2000 2500 CO2concentration [ppm] Title Date DTU 7
TEACHER ABSENCE 0.03 0.025 0.02 Absence (%) 0.015 0.01 0.005 0 0 10 20 30 Ventilation rate L/(s person) (Milton et al. 2000) Title Date DTU 8
CALCULATION MODEL IEQ before renovation Effect of pupil performance on learning outcome Effect of pupil absence on learning outcome Pupil illness absence Teacher illness absence Definition of renovation measures Prediction of IEQ after renovation Evaluation of socio- economy Title Date DTU 9
CO2 CONCENTRATION BEFORE AND AFTER INSTALLATION OF A VENTILATION SYSTEM Before After Title Date DTU 10
BUSINESS CASE Present values One-sided natural ventilation Combined one-sided natural ventilation and mechanical ventilation 500 pupils 40 teachers System lifetime 20 yrs (mio ) (mio ) 1.1 Reduced absence pupils - Installation and running costs: 0.5 mio Reduced absence teachers - 0.1 Higher pupil performance - 1.0 Higher learning outcome due to reduced illness absence - 0.2 Total - 2.4 Title Date DTU 11
Benefits exceed costs by a factor of 5! Different accounts for investment and benefits Benefits very long-term Title Date DTU 12
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