HEPA is probably the wrong thing to focus on. Instead focus on the actual rating level ( I can't remember the scale atm) one thing to remember is that you need

HEPA is probably the wrong thing to focus on. Instead focus on the actual rating level ( I can't remember the scale atm) one thing to remember is that you need to make sure your HVAC can handle the higher ratings (the virus and pathogen level filters), or your motor might burn out.