A personnel down-draught cleaning booth, also known as a personnel cleanroom or a personnel air shower, is a specialized enclosure used in industries such as pharmaceuticals, electronics manufacturing, and biotechnology to maintain clean and sterile environments.

Here’s how it typically works:

1. Enclosure: It’s a sealed or semi-sealed enclosure with doors on either end. People entering the cleanroom step into the booth through one door and exit through the other.
2. Airflow: The booth is equipped with high-efficiency particulate air (HEPA) filters that capture particles as small as 0.3 micrometres. These filters are typically located in the ceiling or walls of the booth. Clean, filtered air is then circulated downward over the person inside the booth.
3. Downward Airflow: The clean air is blown downward in a laminar flow pattern, effectively removing contaminants such as dust, lint, and other particles from the person’s body and clothing. This helps prevent contamination of the cleanroom environment.
4. Air Shower: Some models include additional features such as air showers, where high-velocity jets of air are directed at the person from various angles, further removing particles.
5. Control Panel: There’s usually a control panel located outside the booth, allowing users to regulate airflow, adjust settings, and monitor the system’s performance.

Personnel down-draught cleaning booths play a crucial role in maintaining the cleanliness and sterility of controlled environments, helping to ensure the quality and integrity of sensitive processes and products. They are often used in conjunction with other cleanroom equipment and practices as part of a comprehensive contamination control strategy.

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