I didn’t give it a five, because the device could not help me for its intended purpose and due to lack of information. I returned the goods, first as faulty, because neither in the printed, nor in the pdf instructions, nor in the promotional video - nowhere is there a description of how to start working with the device, namely, that after preparing it for work and turning on the regulator, a red alarm indicator is displayed for the first minute lack of water and this is a normal mode, not a malfunction. I, as a reasonable techie, seeing the emergency indicator light up, turned off the device. But this is a normal mode, the evaporation chamber with an ultrasonic membrane is gradually filled with water to the desired level only in the on state, when the water supply solenoid valve opens! This is not stated in all manuals. Already before packing before returning, as a techie, this scheme of work came to my mind and successfully "conducted an experiment at my own risk", the device started working. I wonder how other buyers ignore the red indicator when turned on? At first I turned it on at half capacity, because at the maximum the device simply “spits” with water, but the humidity has not changed much in a few hours. I turned it on for 12 hours at full capacity, the humidity in a closed room with a closed window without ventilation rose from 23 to 27 according to two hygrometers. During operation, the device flooded itself with water, it flowed from the lid onto the table, everything around was flooded with water. From a 10x30 rag on a battery, more than a liter evaporates in an hour and the floor is dry, and it’s hard to breathe from the “fog” of the ultrasonic humidifier, this is not humidified air.
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