Boneco S250

We have only been using the S250 model for about 5 days. The room is 18 meters. But the conclusions are already visible: the tank volume is 3 liters, not 3.5 as indicated on the website; in night mode it lasts for 15-16 hours of operation; when the desired humidity is reached, it turns off with an error of 5 units (it needs 50%, it turns off at 55%, etc.); The noise level is promised on the website and on the box to be up to 35 dB... but the included instructions indicate up to 50 dB; In fact, we measured noise with different instruments... and this is what came out: in quiet mode 40-42 dB, and in strong mode 48-50 dB. With a quiet mode we sleep, but with a strong mode it’s not possible... it’s as if a kettle is boiling and bubbling nearby. Humidity in night mode reached 54%, and in high mode it reached 62%. In general, I’m happy with it, because for that kind of money there is no normal STEAM humidifier. It copes with the rest of its functions. Thank you.