That means anything you might introduce when working within the hood is immediately pushed out of the enclosure. Risks of contamination from operators may be reduced in horizontal laminar flow hoods because hands are located downstream of the airflow.If you do not use large or bulky equipment on the work surface and want to ensure the lowest level of turbulence, horizontal flow might be best for you.The choice for your specific needs can come down to personal preferences but there are a few benefits unique to each model. When to Choose Horizontal Laminar Flow or Vertical Laminar Flowīoth horizontal and vertical laminar flow hoods provide unidirectional airflow that protects products on the work surface against particles and particulates. Learn more about Horizontal vs Vertical Laminar Flow Clean Benches and how to choose which option is right for you. Air exiting the filter media passes unidirectionally from the unit ceiling and then across the work surface, sweeping particles out of the enclosure as it goes. Vertical laminar flow hoods typically have a top or ceiling mounted filter. Unidirectional filtered air is then passed horizontally from the rear, straight across the work surface. Horizontal laminar flow hoods more often have filters located on the back wall. Major Differences in Horizontal Laminar Flow and Vertical Laminar Flow Both types are designed to prevent stagnant air or dead zones that cause particle buildup as well as turbulent, violent, or erratic airflow that creates swirls or unpredictable particulate movement across the work surface and leads to possible contamination. ![]() Whether horizontal or vertical, laminar flow cabinets provide unidirectional airflow that sweeps particulates out of the enclosure.
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