US | COVID-19: OSHA Issues Guidance Document on Ventilation in the Workplace to Minimize Risks from COVID-19

The tips are as follows:

• Encourage workers to stay home if they are sick.
• Ensure all HVAC systems are fully functional, especially those shutdown or operating at reduced capacity during the pandemic.
• Remove or redirect personal fans to prevent blowing air from one worker to another.
• Use HVAC system filters with a Minimum Efficiency Reporting Value (MERV) rating of 13 or higher, where feasible.
• Increase the HVAC system’s outdoor air intake. Open windows or other sources of fresh air where possible.
• Be sure exhaust air is not pulled back into the building from HVAC air intakes or open windows.
• Consider using portable high-efficiency particulate air (HEPA) fan/filtration systems to increase clean air, especially in higher-risk areas.
• When changing filters, wear appropriate personal protective equipment. ASHRAE recommends N95 respirators, eye protection (safety glasses, goggles, or face shields), and disposable gloves.
• Make sure exhaust fans in restrooms are fully functional, operating at maximum capacity, and are set to remain on.
• Encourage workers to report any safety and health concerns.