In a likewise accompanying Quick Start Guide, the essential functions are shown in short supply, but of course, if necessary, the real, multi-lingual instructions is a little more detail. So desired humidity (40%, 50%, 60%), Timer (1, 4, 8 hrs.) And fan speed can each be adjusted in three steps. While the lowest speed is barely audible rustles already at stage 2 already something like a high rotating CD drive and is clearly perceptible, though the absence of hum or the like not too distracting. A permanent operating at level 3 is not in my view be considered. The device can be set in a night-mode in which the display is turned off as far as possible.
Since I have serious problems with dry airways in the office, the HU4803 is there to be used. Instructions on where the unit should be placed at the top (floor, window close, shelf) can not be found, maybe it's simply not care. I could not detect any differences in any case when operating on the ground or table. Through the rubber feet grip on smooth surfaces is good. Placing fill, and off you go. The few steps to use are easily understood. The measured value is displayed in the center of the screen and updated. However, the accuracy is specified in the instruction with +/- 10%, which nevertheless represents a fairly high failure rate when it comes to margins of about 30% between too dry and humid air (30-60) here. Anyway, after the device (in this manual is also pointed out what - but in fact only a few minutes) after some time indicating a stable value of only 25%, there were about 2 hrs 34%.. Even after 3 hrs., This value remained, the water tank had been emptied because by about 1/3. The device gives off - at least initially - a slight, not very pleasant smell, which probably originates from the filter or from the plastic housing, is for me but not annoying. Unfortunately, I could even after several days of operation in which about 12-15 m² office no higher than 40% reach (with Auto Adjust to 50%), generally the value is as low as about 35%. While this is certainly better than the baseline, really excited, I'm not. The comparison with another meter in my flat - the measurement accuracy, however, I can not judge - delivered over longer periods usually same results (+/- 1-2%). However, the values deviate partially - just at the start of the day - more clearly from one another, without that I could see a pattern here.
Chance occurred a phenomenon that the appliance is switched on, a humidity of 52% and indicated due to the Auto mode turned off the fan. Since my other instrument (whether accurately or not) showed a value of 30%, I was surprised and activated the fan manually. Then also fell on HU4803 rapidly the displayed value and resembled my meter. This gives the impression that the moisture meter can be generated in the container, possibly deceive higher humidity itself and thus stops operating, although not at the desired value has been reached. A regularity of this phenomenon I could not find, however, so far.
Elaborately I find the predefined cleaning the filter, the 1 x per week should be rinsed and every two weeks in a 1: 1 should be decalcified vinegar solution for one hour. Apart from the fact that in any case the latter is likely to be difficult to achieve for me in the office, then would probably up to 2 liters of vinegar per month are consumed because the filter has a fairly large extent, so that a vessel with some capacity is expected to be necessary in order to fully submerge him in an appropriate solution. My initial idea to use distilled water, so that a cleaning / filter replacement arises less frequently, is not economical due to the consumption of 1-2 l per day. Here might be next to the antibacterial filter and a scale filter have been useful - indeed would the well again costs money, as of at least 1 x per year due replacement of two existing filters, but you might perhaps have spared the vinegar bath.
So the bottom line is a device, which carries out his task in principle, however, is reaching its performance limits (at least if you do not operate all day) and is also quite high-maintenance. However, the likely similar for comparable units, ie be systemic. The price / performance ratio, I find a total of more moderate. I fear, in the long term maintenance is troublesome to me, so I shall confine myself in future to an evaporation tray and / or Sea Salt Nasal Spray.
