Why doesn't the humidity level increase even though the device is operating?

The lower the humidity level (below 35%), the longer it will take for the device to raise the humidity level. Evaporative humidifiers like OSKAR cap the humidity level between 45% and 50%. It takes at least 2 weeks to see an improvement. The humidity is first absorbed by the floors, furniture and walls. In addition, the height of the room is also a factor to take into account. Also check that the filters are not worn.