Is clean air flowing into the room from the ventilation hole (diffuser) installed on the ceiling?

EXPURI's HEPA filter is a high-performance filter that can filter 99.975% or more of 0.3㎛ particles in the air.
With Ecolocell's unique technology, we want to create a world where everyone can breathe clean air, including a HEPA filter that removes 99.75% of indoor ultrafine dust and fine dust, as well as additional deodorizing, antibacterial, and antiviral functional filters.