Where are HEPA filters located in horizontal airflow hoods?

HEPA filters in horizontal airflow hoods are positioned at the rear part of the workstation. This placement is crucial for maintaining the safety and integrity of the sterile field within the hood.

When air is drawn into the hood, it passes through the HEPA filter located at the back, which effectively captures airborne particles, including bacteria and allergens, preventing them from entering the workspace where sterile compounding occurs. As a result, the filtered air flows toward the front of the hood, creating a unidirectional airflow that helps protect the compounding area from potential contaminants.

This design ensures that the clean air is consistently directed over the work surface, allowing pharmacy technicians to work safely and effectively while preparing medications. Having the HEPA filter at the rear prevents contamination and optimizes airflow patterns necessary for aseptic techniques.