In pharmaceutical manufacturing, environmental control is critical for product quality. Factors that can affect pharmaceutical products include light, temperature, humidity, air movement, microbial contamination, and particulate contamination.

Proper environmental conditions ensure the effectiveness and quality of medications. For example, without accurate and reliable humidity control, medication potency can be compromised, and they can succumb to irreversible product destabilization. Room pressure control is also essential to ensure clean airflow and acceptable airborne particulate counts per cubic meter.