Sounds interesting, but any prototype to show us about the air purifier unit? It is impossible that the unit without any noise, but it can be very low noise, within how many db levels?
You right, it's not silent. When we say without noise is below the threshold to make it noticeable on high streets: between 30-40 db.
Difficult to show prototype until the patents move one step forward. We know it's a caveat but can't help there until our lawyer doesn't give us green light.
