I’ll make a reservation right away that for the first time I encounter any kind of air purification or humidification. The test is carried out by a separate hygrometer located behind a barrier (table) at a distance of 1 m from the sink. Total: Humidification: in general OK, albeit slowly, manages to moisturize when it's time to ventilate again. Or endure the noise from the maximum speed. Purification: rather so, formal, the dust in the room has not decreased, although it is possible that it has become less soaring in the air. Ionization: it is impossible to check without equipment. Model VE400-4 considered an overpayment. It makes no sense to turn off ionization and an electrostatic filter at all. Turn off the backlight, it would be better not to have it at all. But Amazonation is done extremely poorly, because in order to use it for safety reasons. You need to turn on the AmazonE, leave for 2 hours, then return, turn off the AmazonE, open it for ventilation and leave again for 1 hour. Make at least some kind of timer. For these functions + the water level sensor 400-4 costs one and a half times higher.
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