I have a small de humidifier. In my room I have it set at 50 percent and have found that the RH(relative humidity) varies from 37 to about 52. The dehumidifier will create "exhaust" or a hot air as it does its' work.

Buy yourself a little rh and temp meter and like the other guy says, see what happens when you make your settings.

Be sure to empty the water cause it don't work at all well when the bucket is full.