Uni-Directional AirFlow (UDAF) is a specific form of airflow where air travels in a single direction in a laminar flow. UDAF is also used as a term for a specific piece of equipment that’s sole purpose is to generate Uni-Directional Airflow.
UDAF is used to force clean air over a high risk location to reduce risk of contamination with Sanitary processes.
An example of UDAF is a Downflow Booth flowing air from the ceiling to the floor,