HEPA filters are considered medical grade and are used in many medical and office spaces. The reason is that they are able to remove 99.97% of all particles as small as .3 Microns. In a separate article titled “Which is the best HEPA Filter” I wrote and extensive article on the various HEPA Filter air purifiers. There is one that is also marked as the best HEPA filter for medical offices.
|MERV Rating||3.0 - 10.0 Microns||1.0 - 3.0 Microns||0.3 - 1.0 Microns||.3 Microns||Is It HEPA?|
|1-4||less than 20%||-||-||-||No|
|6||20% - 49.9%||-||-||-||No|
|8||50% - 84.9%||-||-||-||No|
|10||85% +||50% - 64.9%||-||-||No|
|12||90% +||80% - 89.9%||-||-||No|
|14||-||90% +||75% - 84%||-||No|
As seen in the chart above, if you are looking for a medical grade filter, you will need a HEPA filter. Be careful, HEPA filters are not designed to be used in your standard home HVAC unit.