Laminar Flow Hood -- An Air Flow In A Confined Space Whose Velocity And Direction Are Same.

1. Laminar Flow Hood -- An Air Flow In A Confined Space Whose Velocity And Direction Are Same. A laminar flow hood is a closed clean bench which is used to regulate the filtered air from HEPA filter. These HEPA filters helps to remove small microscopic particles like aerosols and micro-organisms from air. These laminar flow hood are usually used where biological samples are being handled. It is even used while using sensitive materials, or semi- conductors. Mostly a clean bench has sample of exhibits which are sensitive to outside particles slung with the fact that the risk of contamination could probably be extremely dangerous and can destroy the sample working on. Class I : These are similar to chemical fume hoods Class II: Hard ducted to the outside Class III: TO be used when working on Human pathogens and other BSL-4 materials. These laminar flow hoods are made up of stainless steel without any gaps or joints. WORKING OF LAMINAR AIR FLOW HOOD Laminar air flow hood works by using the in-flow laminar air. The concept is that the air in the portable laminar flow hoods is used via HEPA filters, which is so designed that it restricts the passage of particles as small as micro-organisms; thus, creating a particle free environment to work in for the laboratory personnel. After passing through HEPA filters it is circulated in the chamber i.e. the working area creating a particle free environment. A positive air pressure is maintained to avoid any back flow of the contaminated air from the room. Usage of these laminar air flow hoods is maximum in research facilities where they need a dust free environment to work in. Even in CDC (Centre for Disease Control) and other such facilities these hoods are installed to maintain a sterilized environment. They are suitable for working areas which do not work with bio-hazards. The air flow of these cabinets is designed in such a way that while they give complete protection to the sample, it is not so with the user. The user is often exposed to contaminated air from the cabinets. Various different types are available based on the nature of the work.

2. The efficiency of a laminar floe hood depends on a variety of reasons. The design, material used to create it, the comfort of usage is all important aspects of any laminar flow cabinet. These cabinets are available in various airflow setting configurations. Airflow that is passed through HEPA air filters can be either horizontally or vertically according to specific requirements. The primary purpose of these laminar flow cabinets is to prevent the sample or the exhibit that they are working on from external contamination. Wisely select your laminar flow hoods.