Fume Hoods

Fume hoods, standard in any chemical laboratory, enable researchers, workers, and students to safely work with hazardous and volatile materials. The concept of the fume hood is simple — to ventilate dust, debris, fumes, and other contaminants away from users and out of the laboratory. But while the concept is simple, the number of different types of fume hoods available can complicate choices.

The health and safety of laboratory users is one of your main concerns when choosing fume hoods. In order to ensure that contaminants in the operator’s breathing area remains at a safe threshold, the right types of hoods must be chosen for the intended application. In addition, hoods must be properly installed and regularly maintained to ensure they are properly working and satisfying ventilation requirements.

Air Foil Fume Hoods

Air foil fume hoods are a type of fume hood with an aerodynamic entrance shape. Instead of having square faces, air foil fume hoods have a gentle slope on the bottom front air foil that reduces turbulent air patterns and increases laboratory safety.

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Walk-In Fume Hoods

If your laboratory requires fume hoods that house large equipment, walk-in fume hoods are an excellent option. While the name might indicate otherwise, walk-in fume hoods do not allow users to walk in and out of the fume hood while it is being used. Walk-in fume hoods, which are basically bench hoods that reach the floor, do allow users to walk in and out to set up equipment before and after work begins.

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Flat Front Fume Hoods

Flat front fume hoods are ventilated enclosures that keep laboratory users and the environment safe from fumes, dust, and other contaminants. Flat front fume hoods are enclosed on three sides, and have a vertical, horizontal, or combination sash that can be raised or lowered in front.

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Demonstration Fume Hoods

Like traditional fume hoods, a demonstration fume hood is a ventilated enclosure designed to protect its user from chemicals, dust, vapors, and other contaminants. However, there is one major distinction between typical fume hoods and demonstration fume hoods. Instead of being enclosed on three sides with opaque material, they are enclosed by transparent safety glass.

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Thin Wall Fume Hoods

Like standard fume hoods, thin wall fume hoods are designed to protect laboratory users and their environment from chemicals, fumes, dusts, and other contaminants. Thin wall fume hoods are enclosed on three sides, with an adjustable sash made of safety glass in the front. Thin wall fume hoods are usually attached to the laboratory’s exhaust system, but can also be ductless in less dangerous applications.

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Specialty Fume Hoods

While the general fume hood can be used in many different laboratory environments, there are situations in which specialty fume hoods are necessary. The reasons for requiring specialty fume hoods include the types of chemicals and properties used in the hood, the size of the equipment placed in the fume hood, and even the needs of the operator.

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Green Fume Hoods

Fume hoods are known for consuming massive amounts of energy. Conventional fume hoods—those that vent a constant amount of air over a 24-hour period—can use as much energy as a 2,500-square foot home! While many manufacturers have introduced new theory into fume hood design since the 1950s, it’s been only recently that new technology has allowed for the development of more environmentally friendly fume hoods.

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Perchloric Acid Fume Hoods

Perchloric acid is a chemical subject to violent explosions. Perchloric acid fume hoods, and their exhaust systems, are designed to allow safe use of this chemical by meeting five criteria. They must not react to percholoric acid, be watertight, explosion proof, have a dedicated duct and blower system and be single use.

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Radioisotope Fume Hoods

Radioisotope fume hoods are designed with two very specific considerations in mind. First of all, they must be constructed so that even minute portions of radioactive material can be easily cleaned from the surface. Second, they must be strong enough to hold the heavy lead bricks that are used to shield radioactive material during work.

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