HVAC Validation in Pharma
HVAC Validation = Control + Evidence + Compliance
1. DQ – Design Qualification
Verify HVAC design meets GMP, process, room classification & user requirements.
2. IQ – Installation Qualification
Confirm equipment, ducts, filters, sensors, controls and utilities are installed as per approved specifications.
3. OQ – Operational Qualification
Challenge and verify HVAC operation under defined operating conditions.
4. PQ – Performance Qualification
Demonstrate consistent performance during routine/representative conditions.
Critical HVAC Parameters
- Temperature
- Relative Humidity (RH)
- Differential Pressure (DP)
- Air Changes per Hour (ACH)
- Airflow / Air Velocity
- HEPA Filter Integrity
- Airflow Direction
- Recovery Time
- Particle Count
- Microbial Monitoring, where applicable
Key Validation Tests
HEPA Integrity → Airflow → ACH → Pressure Differential → Temperature/RH → Particle Count → Recovery → Smoke Study
Remember
HVAC validation is not just testing—it is documented evidence that the system consistently maintains the required environmental conditions.
GMP Principle: “If it isn’t documented, it didn’t happen.”