How Do Horizontal Laminar Flow Hoods Work

If you own a laboratory or are associated with one, it is one of the essential steps to know about the general and specialized machines working inside the lab. It might seem a little tricky, but with this article, you can surely get a better insight into the topic mentioned above.

Like any other laboratory machine, Horizontal Laminar Flow Hood operate in a specific manner that needs to be studied and learned before working with one. Laminar Flow Hoods have become an integral part of every highly functioning lab because of its diverse functions and effectiveness. There are majorly two options to go for if you want to work with a Laminar Flow Hood. These are Vertical and Horizontal Laminar Flow Hoods. Even though the structure of the unit remains the same for both cases, certain specifications interest the researchers to opt for a particular type.

Horizontal Laminar Flow Hoods is different from the other form, mainly due to the direction of airflow is horizontal. This has gainedquite a lot of popularity. Some of the pros that make the Horizontal Laminar Flow Hoods specifically functional are

  • Product protection is way better than what you can achieve with Vertical Laminar Flow Hoods.
  • Causes less turbulence contributing to the more excellent stability of the workspace.
  • Operation is more accessible; you can flexibly position your apparatus and equipment, which cannot be done in the other case.

However, every system has some drawbacks; so do Horizontal Laminar Flow Hoods. When working with this kind of laminar flow hood, the operator is more exposed to contamination and dust. Since the airflow is directed horizontally, it hits the operator directly. Therefore, there is no way an operator is safe from the direct exposure of harmful substances or contaminants. It is recommended to work with extra personal safety when using laminar flow hoods of such kind. Another drawback is you cannot work with large apparatus or equipment because of the same reason as before. With the airflow hitting directly on the large samples, they can hinder it and prevent sterilization of the downstream samples.

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This was a brief introduction to the subject that you will be learning indepth in the next segment. Now that you have learned what makes it different from the other variant let us learn how it works.

  1. Air from outside is drawn into the chamber:

The very first step of the whole mechanism is drawing the ambient air into the chamber from behind the filter systems. This contaminated air on being pulled inside the chamber passes at first through a pre-filter which removes gross contaminants followed by the HEPA or High-Efficiency Particulate Air filter. This filter captures every possible contaminant and releases air that is 99.99% free of germs, dust, and particles. Since it is the horizontal version of Laminar Flow Hoods, the direction of the parallel airflow is horizontal, i.e., the air flows from behind the filter into the workspace directly coming in contact with the user.

Note: Due to the direction of the airflow, it requires a broader floor space and rear area to be set up because the rear-mount fan/filter are compacted into the unit, which needsample space and not height as in the case of Vertical Laminar Flow Hoods.

  1. A Positive Pressure prevents intrusion of Contaminated Air:

Inside the chamber, a positive pressure is maintained so that any contaminant present in the atmospheric air outside the chamber does not get access to it. It is necessary to keep this in mind that when you are concerned about contaminated air getting access into the enclosure (other than the entry side), you should always use positive pressure. This applies for every additional unit that works on the same principle and serves the same purpose.

  1. Cleaned Air Comes Out as Parallel and Uniform Lines:
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This is the most crucial feature of any Laminar Flow Hood. It is this feature that makes it does all the work. When you are talking about sterilization, you should remember that a mere filtration system aided by some other elements is never enough to make sure that each inch of the workspace is cleaned. For this reason, technology has leveled up the game, and only uniform and parallel airflow lines are used to sterilize a certain amount of space.

Parallelism and Uniformity ensure that every area has been covered and that no contaminants are left behind in anywhere around the space.

Are you now excited to see a Horizontal Laminar Flow Hood work?

You must have been wondering all this time about how the entire unit works so brilliantly. In case you have visualized the above discussion, you should be excited to see it work in reality by now. If you get a chance to meet this amazing unit, make the most of it by observing and learning more about it.

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