Do you want to control exposure to hazardous chemicals? Or do you need an enclosure device for mechanical ventilation? Or do you require only the insertion of arms and hands of users for accomplishing laboratory tasks? For fulfilling all the above purposes, chemical fume hoods are the ultimate solution. Most laboratories prefer to utilize fume hoods for meeting their requirements. Here the question arises: What is a fume hood, how does it perform its functions, what are its major types, and what’s the difference between a fume hood and biological safety cabinet?

Give a read to this blog post to grab useful knowledge about above mentioned topics.

What are the chemical fume hoods?

A five-sided enclosed device is a fume hood to eliminate vapors, toxic fumes, and dust particles in cleanrooms. This local ventilation apparatus is the most reliable for controlling different aspects within a lab. 

A hood comprises gases, specks of dust, or microbes and puts them outside with the assistance of the exhaust procedure. Furthermore, it protects workers from splashes, fires, or minor explosions that mostly happen inside a closure. 

How do the chemical fume hoods work?

Chemical fume hood functions operate with a movable front sash and an interior baffle. Sash works as a barrier between chemical reactions and workers. According to the size of the hood, sash movement may become vertical, horizontal, and combine both. 

Baffle helps to exhaust air directly. They are adjustable to enhance airflow. You remember that baffle should open without any blockage. 

Without any curves, airfoil allows a massive amount of workflow as a part of the hood. All this process proceeds efficiently if your fume hood is excellent.

Types of chemical fume hoods

Two main types of chemical fume hoods exist. To give you a better idea about them, they are explained below. 

· Constant Fume Hood

A hood that exits a constant airflow rate through the exhaust is known as a constant fume hood. Due to this reason, the lowering of the sash decreased the cross-sectional area of the hood. Alongside it, the airflow velocity escalates accordingly with the same proportion. Therefore, we can say that sash lowering assists in getting higher face velocities.  

· Variable Air Volume Hood

In variable air volume hood, air-pulled quality varies according to the position of the sash. In it, face velocity does not change. However, exhausted air volume becomes lower by decreasing sash as well as cross-sectional hood area. In addition, it incorporates standard operation and standby mode. You can select any for fulfilling your needs. 

Difference between chemical fume hoods and biological safety cabinet

Fume hood manufacturers tend to make both types of biological safety cabinets and chemical fume heads. The functions of both types of equipment are different from each other. 

  • The fume hood is best for protecting dangerous chemicals, but the safety cabinet removes infectious biological agents. 
  • Fume secures workers while the cabinet is beneficial for users, environment, and material. 
  • Hood does not demand a HEPA filter, but it is crucial for the Safety cabinet.
  • The chemical hood directly sets air outside the room. On the other hand, the cabinet does not do this process. 

If you are looking for hood products, you must visit Youthtech, where chemical fume hood prices will be reasonable with high-quality. 

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