Since I have no way to measure that, I can say about the impact and the degree of humidification in the room is not much. The fragrance and ambience of the small Vesuvius is however not beat against expensive equipment .... and therefore ...
End of November 2011, I finally bought a still from Amazon in BLACK.
The small Vesuvio are becoming increasingly scarce and expensive.
That speaks well for quality.
Also my new black nebulizer Vesuvio is quietly running for several hours, is operated by the Young Living oils, and turns just as on how the white.
Its just a different color.
I can recommend from 100% convinced.
This is top quality.
Since I have already commented on and rated the white detail, I'll be here no more questions to answer - but instead .....
Comfortable and healthy mist!
A beautiful time I want!