Maintaining Healthy Environments and Facilities Frequently Asked Questions (FAQs)


Last updated: August 30th, 2022

What are the procedures in place to handle ventilation during wildfire season when air quality is poor?

Vaccination, proper masking, and hand washing are important mitigation strategies that will be in place to prevent the spread of COVID-19. Schools will prioritize healthy air indoors, which may include shutting windows and doors when air quality is poor, and utilizing PACs (portable air cleaners).  The SF Department of Public Health guidelines currently allow programs to continue to operate even when windows and doors are closed.

During the winter, it will get cold. If classes are expected to keep the windows open, how can we ensure that students and staff stay warm?

Students will be encouraged to wear and bring extra layers to keep warm during colder months. All staff, students, and visitors on school sites and school buses may wear a mask, as masking indoors continues to be an effective mitigation strategy to prevent the spread of COVID-19.

What are the standards for air purifiers and filters that SFUSD is procuring?

The Facilities Department has purchased the High Capacity Plus Purifier from USA Sealing for classroom use. Four criteria shaped the selection of this model of PAC:

  • HEPA filtration
  • Large room capacity: 1500 square feet
  • Low power draw:  4 amps
  • Sturdy construction: will hopefully withstand the bumps and bruises of classroom life.

For more information about the distribution plans to school sites, review this public announcement.


Last updated Aug. 5, 2021

How do we prevent COVID-19 transmission on public transit when school reopens to in-person learning?

A majority of Muni routes have been restored for the 2021 school year. Muni will continue with COVID-19 precautions, including requiring masks, compliance monitoring, and vehicles will be cleaned at the end of the day. Learn more about Muni routes serving schools at

This page was last updated on August 30, 2022