Now about the noise. The first and most basic source of noise is the fan and it makes a lot of noise during operation, no matter what anyone says. To clean and humidify the air, the ventilation mode is always necessary and therefore it will always be. The next source of noise is a pump pumping water, but it also makes noise and its noise level is comparable to 1 fan speed. And the last source of noise is the bubbling water that splashes under pressure in the upper compartment of the device and then runs down. You probably heard how a running stream or tap water gurgles, well, that's it. And the advertised quiet device "from 9 dB" during its full-fledged work turns into a rather noisy thing. At speed 2, the device already begins to stand out and attract attention against the background of ordinary sounds at home or work, not to mention 3 and turbo. The night mode is apparently made for show, especially for lovers of night modes, to be, since its effectiveness with such a weak air flow is very doubtful. So a really relatively comfortable level remains only at 1st speed. About efficiency. - It blows well as a fan, it can automatically turn the flow to the left / right, why up / down left to control the hands is not clear. - As an air purifier, I can’t say anything yet, because I don’t use it much. - Works as a humidifier. The air is humidified and, due to a powerful fan, is effectively distributed throughout the apartment. At speed 2, the humidity rose and remained at around 40% in all rooms with a total volume of 46 sqm. - As a cooler, the effectiveness is doubtful, due to moisture and the addition of ice, a decrease of 2-5 degrees is possible and will be, but this greatly depends on the conditions in which the device will be used.
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