Air Handling Unit (AHU):

An AHU conditions, filters, and circulates air within a building or controlled environment. In this context, the AHU provides the filtered and conditioned air that the UDAF system utilizes. It ensures the quality of the air supplied to the UDAF and subsequently to the filling line.

Single Pass-Through System:

The air passes through the UDAF and the controlled environment only once before being exhausted or possibly recirculated. This setup is used when maintaining a specific level of cleanliness is necessary and recirculating the air might carry contaminants back into the controlled environment.

Building Management System (BMS):

It is a centralized system that monitors and controls various building functions, including HVAC (Heating, Ventilation, and Air Conditioning) systems. In your case, the BMS controls the AHU and possibly the UDAF system as well. This helps to keep optimal conditions, efficiency, and coordination between different systems in the facility
In summary, your described scenario involves using a Unidirectional Air Flow (UDAF) system connected to an Air Handling Unit (AHU) in a single pass-through system over a filling line. A Building Management System (BMS) controls and coordinates this setup to maintain a clean and controlled environment crucial for sensitive processes. This method ensures the safety and quality of products in pharmaceutical or electronics manufacturing