Does Briiv reduce CO2?

Like most purifiers Briiv works by filtering harmful and pollutant particles from the air and traps them in the filter medium. Briiv effectively removes PM2.5 particles, and can even capture more erratic particles as small as 0.3 microns! The activated carbon in the nano matrix filter can remove some gas pollutants, but nothing in common household air purifiers that are currently on the market can remove CO2 from your home. 

You'd have to get a specialty filter system, or stick to good old fashioned ventilation!