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The fume hood is an accessory of the laboratory

Which prevents workers from being exposed to dangerous fumes at work. In the early days, they were made of wood. Today, they are made of epoxy-coated mild steel. Changes in structure and style were introduced to make it safer for laboratory staff. There are two main types of Fume hood, namely, flow hood and recirculation hood. In both units, fans are used to suck in air from the front of the cabinet, then blow it out of the building or filter, and then return to the workplace.

Circulation fume hood

This type of hood is used for educational purposes or in buildings that do not allow the installation of external pipes. In addition, a fan is installed on the top or under the hood. The air is drawn through the opening in the front of the range hood, and then through the filter; the air passes through the fan, and finally returns to the workplace. There are different sizes of circulation fume hoods or standard size fume hoods. They range in size from 4'to 8'. However, some companies can manufacture fume hoods that fit your laboratory's specifications.

The main disadvantage of this type of range hood is that, compared to the use of ducted range hoods, workers working near these range hoods are more likely to be exposed to harmful chemicals. Another health problem is that because the exhaust fan is close to the workplace, workers working near the fume hood will be affected by noise.

Air duct range hood

These types of covers are used for industrial purposes. They remove air from the work space and disperse it into the atmosphere. In order to improve indoor air quality, some laboratories use one-way air handling systems, which use heated or cooled air and then discharge. On the other hand, laboratories that want to minimize energy costs often use return air systems, which provide adequate ventilation rates and appropriate working conditions.

The main advantage of this hood is that it can eliminate the smoke and dust generated by workers from the workplace, and reduce noise pollution caused by the distance between the fan and the workplace, so that the workers can work in a safe environment. The main disadvantage is that it requires additional catheters and is therefore more expensive. It also pollutes the atmosphere because it does not deal with smoke that is dispersed into the atmosphere.

Safety tips to keep in mind when handling or using the cooker hood

If possible, use less hazardous materials to reduce exposure to harmful fumes.
Ensure that the exhaust fan of the fume hood is working properly to ensure that your workplace is free from air pollution.
Do not put your head in the hood to avoid exposure to harmful fumes.
In order to minimize the energy costs used by the hood, always close the hood blades.
Do not store or discard any items in a fume hood to avoid blocking the airflow.
In order to ensure that the range hood can handle the hazards caused by chemical vapors or substances in the air, it is important that if you are not familiar with the range hood company, please ask professionals to install them.


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