Ventilation in Schools
CFD Analysis of Ventilation in Classrooms
The global pandemic has highlighted the importance of indoor air quality and how innovative ventilation strategies can reduce the spread of diseases, saving lives. According to the Centers for Disease Control and Prevention (CDC), COVID-19, along with diseases such as tuberculosis, measles and chicken pox, is predominantly spread by airborne transmission. This is where small droplets and aerosol particles containing the virus are inhaled by a person, contaminate surfaces they touch or land on their eyes, nose or mouth. These droplets can remain in the air for hours and can infect people who are up to 1.8 m (6 ft) away.
To reduce the concentrations of these infectious droplets in the air, effective ventilation needs to be achieved. In fact, the World Health Organization (WHO) suggests that six air changes per hour (ACH) can significantly reduce the spread of viruses like COVID-19. There are two main methods of ventilation; natural and mechanical. Natural ventilation is driven by pressure differences within the building design and includes opening windows and doors.
Mechanical ventilation involves advanced heating, ventilation and air conditioning (HVAC) systems. These exchange stale indoor air with fresh filtered outside air and exhaust VOCs [Volatile Organic Compounds], CO2 and viruses. Effective HVAC systems also eliminate recirculation and cross contamination between airstreams.
We are proud to have worked with the Integral Engineering and Engys Teams to conduct a study on the affect CO2, the Age of Air, and ventilation methods can have on occupant health and wellbeing.