The reviews write noisy, in night mode you can’t hear it at all if it stands next to the bed at the head, in the middle mode it makes noise just like an air conditioner, at the maximum it’s not that loud, but nearby (near the head) is already uncomfortable. I sleep comfortably with him on medium mode, when he stands near his head. In quiet modes, a very quiet squeak can be heard, I don’t know bearings or electronics, but it doesn’t bother me at all if my mind is healthy. Clears airborne dust unambiguously. It is very fortunate that the outlet of the purified air is made upwards, and not sideways, as in some models, at normal speed, the side-blown stream will raise all the dust, in this case much smarter, 360-degree intake on the sides and exhaust upwards.
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