I love fresh air, I always leave micro-ventilation in the room, so even in a room with 15 square meters. m. It is difficult to bring humidity up to 50%. You have to use it in conjunction with another humidifier ("washer" of the air). With it, it is possible to maintain 45-55% humidity. At the same time, if you clog the windows, then the humidity calmly reaches 50% + with one device working. The square of the room is small - oxygen runs out quickly, so there is no way without constant ventilation, therefore 2 devices.
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