Humidity levels can vary within the same room due to several factors. One primary reason is the distribution of air flow. Areas closer to air vents, windows, or doors might experience different humidity levels compared to more central parts of the room. This is because air circulation can cause uneven distribution of moisture.
Another factor is the presence of moisture sources. For example, the placement of the humidifier itself or a water source like a sink or plants in one part of the room might drive higher humidity levels compared to other parts of the room
Lastly, the type and placement of humidity measuring devices can affect readings.
Different devices might have varying levels of accuracy, and their placement can influence the readings they provide. For instance, a device placed near a window might show different humidity levels compared to one placed in the center of the room.