A laminar flow hood is a ventilation apparatus with a cross-flowing air system. It helps to prevent the recirculation of contaminated microbiological particles. This means all air entering the room and being exhausted into the external environment will be unpolluted.
Structure of Laminar Flow Hoods
The structure and functioning of Laminar Flow Hoods are quite simple. It is a unit that consists of an outer rectangular enclosure that holds an internal airflow path. The airflow in laminar flow hoods is a cross-flow that prevents the recirculation of contaminated air. To keep the air exhausted from being contaminated, there is a set of air intakes and exhausts on both sides of the enclosure, while inlets and exhausts on either side connect to ventilation ductwork.
Application of Laminar Flow Hoods
Many types of laminar flow hoods available at Global Lab Supply, will vary in the type and number of inlets, outlets, and filters. Laminar flow hoods are used for various applications, including laboratories, medical facilities, pet grooming shops, and hobbyists' workshops where fumes may be emitted. If you wish to add a laminar flow hood to your lab or facility, you first need to learn about its basic applications.
- Infection Control
Laminar flow hoods can serve as infection control devices that protect workers from transmitting hazardous microorganisms such as those residing in tools, clothing, and other equipment. In addition, infections can be prevented by keeping contaminated air from circulating, and workers can breathe clean, uncontaminated air that limits the spread of infectious diseases.
- Ventilation/HVAC
In many spaces where heat or humidity cannot be controlled, a laminar flow hood can help reduce temperatures or humidities to manageable levels by creating negative pressure within the room to draw out outside moisture.
- Air Filtration
Ventilation may be used to keep the air in a space clean by filtering the recirculating air to remove contaminants. In addition, gas and vapor particulates can be removed through a series of filters consisting of an initial collection point where particles will first accumulate, followed by a second system to either collect or dissipate the collected particles.
- Spills/Leaks
Laminar flow hoods also work well at containing spills or leaks. If chemicals are spilled, they can be contained within the drapes and ductwork before being drawn out of the room for safe disposal. It is important to note that all ventilation equipment should be properly regulated and maintained by the facility or lab owner.
Improper ventilation may limit the types of bacteria and other microorganisms capable of causing infection. Laminar hoods can also function as air cleaners when used with ultraviolet rays, also known as UV light sterilization.
Original Sources: https://www.fuzia.com/article_detail/709334/laminar-flow-hoods-a-quick-intro-to-their-structure-and
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