I am very satisfied with the appliance, it is very suitable for small rooms such as bedrooms. I assume that it does not produce ozone. The appliance simply draws in air, filters it (without chemicals) and releases it filtered back into the room. It is barely audible in sleep mode.

Oh, unfortunately I didn't know that. But the appliance is great because once you switch it on, it runs by itself.
And every now and then it's a bit annoying when it's turned up to full power. But it is very economical with electricity because it only has a 12 V motor built in and it even cools the room temperature down a bit.
M.f.G CM