COVID-19 Guidance on Ventilation in the Workplace

OSHA has continued to issue a series of alerts that contain helpful tips that employers and workers should follow to protect themselves from exposure to COVID-19 at the workplace. OSHA asserts that adequate ventilation throughout a workplace can help maintain the heath and safety of workers. It is suggested the employers work with a heating, ventilation, and air conditioning (HVAC) professional to enhance building ventilation. HVAC professionals can help inspect a building’s ventilation systems and ensure that it is working properly. The following suggestions are provided by OSHA to help reduce risk of exposure to the coronavirus:

Encourage workers to stay home if they are sick.
Ensure all HVAC systems are functioning properly. Also check ventilation systems that have been shut down or are operating at reduced capacity during the pandemic.
Remove or redirect personal fans to prevent air blowing from one worker to another.
Use HVAC system filters with a Minimum Efficiency Reporting Value (MERV) rating of 13 or higher, where feasible.
Open windows or other sources of fresh air whenever possible to increase the HVAC system’s outdoor air intake.
Ensure that exhaust air is not pulled back into the building by open windows are HVAC air intakes.
In higher-risk areas, consider using portable high-efficiency particulate air (HEPA) fan/filtration systems to increase clean air. These systems may be considered in all other areas of the workplace as well.
When changing filters use protective equipment, such as N95 respirators, eye protection (safety glasses, goggles, or face shields) and disposable gloves. These protective measures are recommended by the ASHRAE.
In restrooms, ensure exhaust fans are fully functional, operating at maximum capacity, and are set to remain on.
Encourage workers to report any safety and health concerns.