There is a lot of discussion about school performance and the importance of good teachers, but ventilation is one aspect that has been overlooked. Natural ventilation in schools is something that really came to the fore during covid-19 when fresh air was seen as an important way of reducing the spread of the virus. Despite this, few people still consider the health and cognitive benefits that good ventilation provides.
What impact does ventilation have on cognitive function?
There are several studies that demonstrate a clear link between air quality and cognitive performance. One study by Harvard T H Chan School of Public Health found that poor ventilation in classrooms significantly reduces students’ cognitive abilities. The researchers monitored CO2 levels inside the classroom and discovered that higher CO2 levels lead to drowsiness, reduced concentration and impaired decision making, all of which are bad for the learning process.
Another study by the University of Tulsa shows well ventilated classrooms improve attention and reduce absenteeism due to illness. We all recall our teachers flinging open the windows “to let in some fresh air”, which they instinctively knew would be good for pupils.
Natural Ventilation – effective and sustainable
While mechanical ventilation systems can be used, natural ventilation is more sustainable and often more effective. It uses external airflows to ventilate indoor spaces through windows, vents or specially designed architectural features and offers many benefits including:
- Improved Air Quality
- Ventilation effectively reduces CO2 and other potential pollutants. Fresh air circulates and dilutes these pollutants, creating a healthier environment.
- Energy Efficient
- Unlike mechanical systems, natural ventilation relies on natural forces like wind. This can reduce energy consumption and lower running costs as well as help contribute towards net zero.
- Comfortable environment
- A more pleasant environment is created, including in the summer when rooms can be kept cooler without the need for air-conditioning. This is an important requirement of Part O of Building regulations to avoid overheating and Approved Document F (ventilation).
How do you incorporate natural ventilation into classroom design?
- Ensure windows are operable to allow fresh air where possible. Even in colder weather, short periods of window ventilation can help improve air quality.
- In the design process, architects should consider orientation and layout to maximise natural airflow and better cross ventilation.
- Use Natural Ventilation Stacks or natural ventilation Wall Vents which can be adapted to warm fresh air during colder weather.
To discuss natural or passive ventilation solutions for your project, contact us.
