The units can easily be moved to different rooms. The smaller units are light enough to be carried by one person, and the tower units have casters that allow them to be pushed around. Even though the units are mobile, they are not meant to be used in that way. They must be plugged in in order to work and stay in the same place while working, in order to create efficient airflow within the space it is covering. In special circumstances, such as dental surgeries, the VK 401 can be mounted on a trolley in order to always be placed in the ideal position.