It is a horizontal airflow type that the clean air filtered through the HEPA filter flows from the inside the chamber to the direction of the front entrance, and the inflow of the outside air which can contaminate the specimen is blocked as the inside the chamber is maintained as positive pressure (+) without the front door.

Clean work space at any points inside the chamber is available, and if any contaminated particles are generated, they are quickly eliminated. It is mainly used for the work of blood agar plate, experiment or work under the aseptic, non-vibration environment.