We all have been dealing with an unprecedented time in our history with the COVID-19 pandemic that has changed our world.  We all certainly hope that we can return back to our normal lives soon.  As our businesses, offices, schools and other facilities begin to open, there are recommendations by the CDC, OSHA and the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) on how the building operations and building systems should be prepared prior to safely occupying these buildings and facilities.