Abstract. School buildings have an enormous impact on students’ health, well-being and
educational achievement; they also have an impact on energy consumption and other natural
resources. Solar chimneys, solar walls, underground ducts for ventilation, shading, and building
orientation were used to improve the indoor thermal environment in a pilot project school. A
quantitative analysis was carried out based on ﬁeld measurements by recording some thermal
comfort parameters (mainly air temperature and relative humidity) for one year in the school.
The aim was to evaluate the effects of the solar chimney, solar wall and underground duct used
in selected classrooms on the indoor thermal environment and compare the results to base case
classrooms in the same school. The study provided positive results conﬁrming that the passive
environment control system used in the pilot school is highly effective in providing indoor
thermal comfort on hot and sunny days. The impact of ground ducts and solar chimneys on cold
days was relatively small. Most of the classrooms tested on the three floors of the building were
found to be thermally uncomfortable in winter.