Fans can be necessary in a classroom to provide adequate air circulation and ventilation, especially during hot and humid weather conditions. Proper ventilation can help maintain a comfortable and healthy learning environment by reducing the concentration of indoor air pollutants and minimizing the spread of airborne viruses and bacteria. In addition, fans can help regulate the temperature in a classroom, which can have a significant impact on student concentration and academic performance. Research has shown that high temperatures can negatively affect cognitive function and reduce the ability to concentrate, whereas cooler temperatures can enhance cognitive performance and promote learning.