Volume 4 Issue 3 (October 2012) - Ozean Publications

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European Journal of Educational Studies 4(3), <strong>2012</strong> samples. In this method, closer points have more influence on the estimated value than those farther away. A spatial distribution of carbon dioxide concentration for each floor was produced to compare the air quality of the floors in the school. One of the aims of this project was to monitor the temporal change of carbon dioxide levels during class time in two classrooms with fewer and more students. Measurements were taken at the beginning, middle and end of the class time in specific classrooms. While the measurements were taken, the windows were kept open and closed. This method allowed students to observe the change in CO2 level in the classroom between the beginning and end of the lesson. At the end of the project, the students produced the project report and presented their findings at a conference organized by their school. Figure 3: Students collecting data in the classrooms RESULTS Spatial distribution of CO2 There were six classrooms, one servant room, two WCs and one conference hall on the ground floor of the school. As seen in the figure 4, the minimum concentration level of carbon dioxide was found to be 839 ppm and the maximum level was found to be 6.170 ppm. The poorest air quality was in classroom 9/B. The minimum levels were observed in classrooms 12/A, 12/B, and 12/C. The carbon dioxide levels in other classrooms and rooms exceeded the recommended exposure level, which is 1000 ppm. Ninety-seven percent of the ground floor had a carbon dioxide concentration above 1000 ppm. The mean concentration was 2.233 ppm. 342
European Journal of Educational Studies 4(3), <strong>2012</strong> Figure 4: Spatial distribution of CO2 concentration on the ground floor On the first floor of the school building, the minimum CO2 level was 819 ppm and the maximum level was 3.263 ppm (Figure 5). The mean concentration of CO2 was 1787 ppm. The air quality was particularly poor in classroom 10/B. The CO2 levels in nearly all classrooms on the first floor exceeded the recommended exposure level. Figure 5: Spatial distribution of CO2 concentration on the first floor The CO2 levels on the second floor varied between 1196 ppm and 4042 ppm. As seen in Figure 6, the CO2 levels are higher than the recommended level on the second floor. The minimum CO2 values were measured in the WC and parts of the corridor and staircases. The maximum CO2 concentrations were observed in classrooms 10C, 11C, and 10F. 343
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Volume 4 Issue 3 (October 2012) - Ozean Publications

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