HVAC qualification completed for the manufacturing block

HVAC is the primary engineering control in a pharmaceutical facility: it determines the particle count in the room, the direction air moves between rooms, and how quickly a room recovers after an intervention. Qualifying it means demonstrating each of those properties with measurements, not accepting the designer's calculations.

“The design says where the air should go. Qualification is finding out where it actually goes.”

Testing covers air change rates, filter integrity at the point of installation, room pressure differentials in the intended cascade, recovery time after a deliberate particle challenge, and airflow visualisation to confirm that air moves the way the design assumed. Classification is determined against ISO 14644-1 with the sampling locations and volumes the standard requires.

The system is subsequently monitored continuously for the parameters that can drift — pressure differentials and temperature — with periodic requalification of the rest.