**3. Results and Discussion**

Following the procedure explained in Section 2, the next subchapters describe the considerations, calculations, and analyses performed and present the results of these.

## *3.1. Number of Workstations in Monitored Rooms*

The monitored rooms are located in three different school buildings in Vienna, as already mentioned under 2. The nine rooms are six classrooms with greenery and three reference rooms without greenery. As can be seen in table in Section 3.5, all nine rooms have different room sizes and volumes—the room size varies between about 52 m2 and 84 m2; the room volume between 193 m3 and 259 m3.

According to the Workplace Ordinance applicable to Vienna, which among other things regulates the necessary size of a workplace in offices, "at least 8.0 m2 for one employee must be provided plus at least 5.0 m<sup>2</sup> for each additional employee" per room in accordance with \*§24 (1) AStV. §24 (3) AStV also stipulates that at least 12.0 m<sup>3</sup> of airspace per employee must be available "for work with low physical stress", which also includes normal office activities. [53]

In accordance with these legal requirements, the possible number of hypothetical workplaces in the nine monitored rooms was determined. The results are summarized in table in Section 3.5. The calculation was based on both the existing floor space and the air volume, and it turned out that for all nine rooms, the floor space was decisive. The number of workstations in the considered rooms ranges between 8 and 15.
