Indoor climate and improvement possibilities in educational premises

The results of indoor climate investigation in 7 schools of Tallinn are analyzed in the paper.In classrooms with natural air change carbon dioxide concentration at the end of the class isvery high, up to 1.5.3.5 times more than permitted level. With high occupation rate ingymnasiums of Tallinn the good indoor climate and permitted CO2 concentration at the end ofthe class can be provided only with the use of balanced ventilation.