Definitions for "UNDUCTED"
System consisting of one or more air cleaners positioned in the overhead space to create a planned air circulation pattern. This method effectively cleans the overall ambient plant air. Unducted systems rely upon constant cleaning and mixing of the entire room volume to remove airborne contaminants. Unducted systems never remove 100% of the contaminants. The objective of this method is to achieve a substantial reduction in steady-state contaminant concentration.