Put one humidifier in each room. They are open 24 hours a day, water is replenished in the morning and in the evening. Humidity can be kept at 40% -45% with constant ventilation. Sometimes it drops to 30%, at the peak of 54%. I measure in different parts of the apartment with the Tion MagicAir sensor. During the day I put on the 3rd speed, at night - on the 2nd. A couple of meters from the bed, the 2nd speed is almost inaudible, it does not interfere with falling asleep. I read in reviews that the drum is washed in the dishwasher, and the bowl with detergents. To be honest, I don't understand why this is necessary. Once a week I wipe the bowl with a sponge without any means. A small deposit on the bottom (photo 1) is wiped off perfectly (photo 2). I rinse the drum with a shower. For a month of use, no plaque has formed on the drum discs. I am satisfied with the purchase, I hope the devices will work for a long time.
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