Indoor air quality standards for schools
Classrooms are important places for students to learn and teachers to teach, and indoor air quality has a significant impact on the health and learning outcomes of students and teachers. Therefore, the development and implementation of Indoor air quality standards for schools is of particular importance.
Indoor air quality standards for schools
- Indoor air quality standards for schools should include limits for various airborne pollutants. These pollutants include, but are not limited to, carbon dioxide, formaldehyde, benzene, TVOC, and other harmful gases, as well as microbial pollutants such as dust, bacteria, and viruses. Concentration limits should be established for these pollutants to ensure that the quality of indoor air meets health standards.
- Indoor air quality standards for schools should also include requirements for indoor air circulation and ventilation. Good indoor air circulation and ventilation can effectively reduce the accumulation of harmful gases and microorganisms and keep the air fresh. Therefore, the standards should specify the ventilation facilities and frequency of ventilation in classrooms, as well as the requirements for indoor air circulation to ensure that indoor air quality is effectively protected.
- Indoor air quality standards for schools should also include requirements for indoor air temperature and humidity. Excessively high or low indoor air temperatures and humidity can affect the comfort and health of students and teachers, and even learning outcomes. Therefore, the standards should specify the range of indoor temperature and humidity requirements to ensure a comfortable and healthy indoor environment.
- Enforcement and monitoring of Indoor air quality standards for schools is also crucial. Schools should establish a sound air quality monitoring system to monitor and assess the air quality in classrooms on a regular basis to ensure that the standards are enforced. At the same time, publicity and education on air quality knowledge and health awareness should be strengthened for teachers and students so that they can work together to maintain good indoor air quality.
Indoor Pollutant Substance Limits for Schools
Formaldehyde Concentration. The maximum allowable concentration of formaldehyde in classroom air is 0.08 mg/m³. When the formaldehyde concentration is 0.06 to 0.07 mg/m³, children may experience mild asthma; when the concentration is 0.1 mg/m³, there will be odor and discomfort; when the concentration is 0.5 mg/m³, it may irritate the eyes and cause tearing.
Carbon dioxide concentration. The standard value for indoor carbon dioxide is 0.10%, i.e., no more than 1,000 ppm. classrooms should take effective ventilation measures to ensure that the concentration of carbon dioxide in indoor air does not exceed 0.15%.
PM2.5 concentration. For PM2.5, the standard limit is 35μg/m³ for the primary limit (good quality air) and 75μg/m³ for the secondary limit (good air).
VOCs: VOCs are one of the common harmful gases indoors, with a permissible limit of 200ug/m3.
Temperature: Indoor temperature should be between 18℃ and 28℃, with a temperature of 23℃.
Humidity: the indoor humidity should be between 30% and 60%, and the humidity is 40% to 60%.
Ventilation design. The school shall take effective ventilation measures to ensure that the carbon dioxide concentration in the indoor air of the teaching, administrative office, and service rooms does not exceed 0.15%.
The development and enforcement of Indoor air quality standards for schools is critical to the health and learning of students and teachers. Through scientific and reasonable standards and strict enforcement and monitoring, classroom indoor air quality can be effectively guaranteed, creating a good learning and teaching environment for students and teachers.
