COVID-19 Health & Safety Protocols: Indoor Air and Outdoor Spaces
It is recommended that all schools:
- Conduct as many activities outside as possible when conditions allow, especially higher-risk activities like meals and exercise.
- Stagger use of outdoor spaces to keep groups from mixing. If the outdoor space is large enough, consider designating separate spaces for each group.
- Ensure that children wash or sanitize their hands before and after using these areas. When hand hygiene is enforced, cleaning of outdoor play structures is not needed between groups.
Indoor Air Quality
The District district is installing portable air cleaners that use high-efficiency particulate air (HEPA) filters to enhance air cleaning in classrooms and common spaces throughout our schools.
The AERAMax Pro 4 units are designed specifically for classroom spaces. They circulate the air 3 to 5 times each hour and remove 99.97% of airborne particulates. That includes COVID, flu and other airborne pathogens and allergens, including dust and pollen.
Schools can take additional action to improve air quality in consultation with the ACPS Facilities and Energy Systems Departments. General recommendations include:
- Open minimum outdoor air dampers to reduce or eliminate HVAC air recirculation. In mild weather, this will not affect thermal comfort or humidity. However, this may be difficult to do in hot or humid weather.
- Increase the HVAC system’s total airflow supply to occupied spaces as designed. More airflow encourages air mixing and ensures any recirculated air passes through the filter more frequently.
- Disable demand-controlled ventilation (DCV) controls that reduce air supply based on occupancy or temperature. This way the air supply will remain constant throughout the day.
- Continue running the HVAC system at maximum outside airflow for 2 hours before and after the building is occupied (“pre- and post-flushing”) to refresh air before arrival and remove remaining particles at the end of the day.
- Ensure restroom exhaust fans are on and operating as designed while the school is occupied and until staff leaves.
- Make sure the filters are sized, installed, and replaced according to the manufacturer’s instructions.