Where should I position the dehumidifier?
Dehumidifiers work best when there is good air flow around them. Ideally, you should place it in the centre of a room, or at least 6 inches away from the nearest wall, furniture or surface.
If it is a particularly large room, place the dehumidifier close to the source of the moisture to concentrate drying efforts on the source of the problem. Fans can be used in conjunction with dehumidifiers to ensure that airflow is strong throughout a larger space.