**4. Discussion**

The students proposed diagnoses and possible solutions to the problems of the indoor environment of the classroom. The teaching–learning indoor environment must have a global environmental comfort assessment (including aspects of thermal comfort [54], but not exclusively), and students should be considered as a fundamental part in this assessment, as well as the costs for its operation and adequacy [55].

The factors that in this study were considered the most influential with 50% of the students' votes were noise, heat and odor. In the study carried out by Zhang et al., where students were divided into different and independent clusters, noise was considered the most annoying followed by odor [43], while in the Sense Lab's experience room, students reported that the problems that affected them most were noise (58%) followed by temperature (53%) [43].

In the content analysis of the debate group a clear tendency towards student discomfort was found caused by overheating. Zhang et al.'s study in the Netherlands coincides, due to more than 70% of teachers from different types of schools indicating that the most requested students' modification was the adjustment of windows, with the argument of thermal discomfort [41].

The modifications proposed by the students in this studio range from modifications to clothing, window adjustments, equipping the classroom with air conditioners and fans to planting trees around the classrooms. In the study carried out by Bluyssen et al., students proposed similar solutions [43]. The students of both studies agreed on the need to implement a device that regulates ventilation in the indoor environment, adapting to changes in the outdoor environment automatically.

The differences in the perception of aspects that cause discomfort in the classroom between this study and the contrasted studies [41–44] may be due to the fact that the variation in the thermal environment not only affects thermal comfort but also has an impact on the perception of other factors related to the indoor environment [56].
