Why does the hygrometer on my unit read a different humidity level than external hygrometer?
Not all hygrometers are calibrated the same, and most are off by +/- 5%. Plus the humidity level is not the same in the whole room. The air circulation and temperature are different in every corner of the room and may affect the humidity level. The unit should not be placed near a heat vent or a radiator as the heat will absorb all of the moisture. back to top Q: Humidity level is not changing or does not reach the desired humidity level A: If the water tank needs refilling more than once per day, the unit is working properly and the climatic condition in the room has an influence on the humidity.
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