Perhaps you are here because you are aware of the CDC guidelines and suggestions to incorporate quality air filtration into your indoor environment. Maybe you just realize that the air we breathe is full of contaminants from particles like dust, soot and inanimate pet dander to chemicals like formaldehyde bacteria.  A quality air filter will remove all these types of contaminants. 

The key is having a quality air filter. As with all products, you need to take some steps to ensure you understand what you are buying. For example, some air filter companies claim their filter material is HEPA grade. The material may indeed meet HEPA standards, but it says nothing about how the unit is constructed. You need to look for the claim that the entire SYSTEM meets the HEPA standard. 

*The Carico Deluxe air purifier (AIRMDEL, Serial #16190019) was demonstrated by a third party laboratory to remove 99.% of Escherichia coli and Staphylococcus aureus, from the air under typical operating conditions, with the system set at maximum fan speed and the ozone generator disabled.