Indoor air CO2 assessment of classrooms of educational institutes of hyderabad city and its comparison with other countries

Indoor air quality is given lot of importance in modern societies and healthy environment. We spend most of time at indoor homes, workplace, offices, schools, hospitals, factories or even at the shopping malls e.t.c. The buildings may have good or bad indoor air quality (IAQ). Bad indoor air quality leads adverse impacts. If the Indoor air quality is not so good and tends to get poor then it affects the health, and the apparent effects get severe ultimately causing death. This study focuses on the assessment indoor air CO2 in classrooms of the educational institutes. To conduct the research work, many important studies from literature are surveyed and the standard followed internationally for the normal and abnormal levels of indoor air CO2 are kept as reference to rate the measured values. For the purpose of analysis, one government school, two private schools and two private centers are selected. During various visits to the institutions the required physical data regarding dimensions and conditions of classrooms are collected, which consists of number of doors, windows with dimensions and location, ventilation mode and number of fans etc. For noting these results, a data sheet is used. A questionnaire is also used to know the perceptions of teachers of these institutes about the impact of IAQ on the performance of students, teachers and several factors are analyzed in SPSS software. The indoor air CO2 is found to be in fair, good and excellent ranges in most of the institutes. However, in some classrooms, the CO2 concentrations is in higher ranges indicating the possibility of contaminated air, and this demanding more ways of ventilation.