What is the difference between laminar flow hood and FFU mode?

FFU (Fan Filter Unit) and laminar flow hood are two different types of equipment used to create clean environments, but they have distinct working principles and applications.

Working Principle:

FFU: FFU is a self-contained air purification device that consists of a fan, high-efficiency filters, and an air outlet. The fan draws in air from the surroundings and pushes it through the filters, which remove airborne particles and contaminants. The clean air is then evenly distributed into the work area through the air outlet, creating a clean environment.

Laminar flow hood: A laminar flow hood uses a high-efficiency air filtration system to generate a laminar airflow. Clean air is introduced from the top of the hood and flows uniformly in a horizontal direction, creating a unidirectional airflow. The airflow direction is typically perpendicular to the work surface, which helps to remove particulate matter and microorganisms from the work area.

Application Environment:

FFU: FFUs are widely used in various industries and settings that require clean air. They are commonly employed in medical equipment manufacturing, electronics manufacturing, laboratories, semiconductor production, and other environments where a clean air supply is essential. FFUs can be installed in cleanroom ceilings or below workbenches to provide clean air within localized areas.

Laminar flow hood: Laminar flow hoods are primarily used in situations that require precise control over the cleanliness and microbiological integrity of the work area. They are commonly utilized in microbiology, biochemistry, and other sensitive experiments where maintaining a sterile environment is crucial. Laminar flow hoods are often used for handling biological samples, working with cell cultures, and conducting sterilized material operations.

In summary, the main difference between FFU and laminar flow hood lies in their working principles and application environments. FFU functions as a standalone air purification device that filters and distributes clean air throughout the workspace, while a laminar flow hood creates a unidirectional airflow to maintain a sterile environment for sensitive experiments.