Description    Laboratory fume hoods are partially enclosed workspaces that are exhausted to the outside. The primary purpose of laboratory fume hoods is to keep toxic or irritating vapors out of the general laboratory working area. A secondary purpose is to serve as a shield between the worker and the equipment being used when there is the possibility of an explosive reaction, or to protect the specimen.   ...
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Q & A on Fume Hoods

We asked our users for their input on Fume Hoods. Here are the results of 121 users familiar with Fume Hoods.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Design TrendsTop

Q:
What new technologies are influencing fume hood design?
20 answers
Answers:

Low-flow designs for certain applications, with blowers inducing room air at the top of the sash, enabling near-laminar flow to the back of the hood, versus the traditional "roil" of air. No more Reynold's Numbers...

~Certifier

Variable-air volume electronic fan controls, PID sensor integration for organic chemical use, BACNET-capable electronics

~Chris M, Design Engineer, Columbus, OH

Ecosash Automatic Sash Closing System that we have recently released to the Australian and New Zealand markets.

~Reece L, Design Engineer, Wellington, New Zealand
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Q:
From your perspective, which companies are creating the most innovative fume hoods?
17 answers
Answers:
Labconco ThermoFisher Scientific
~R. Sivakumar S, Research & Development, Yorktown, VA
Kewaunee Scientific Fisher Hamilton
~Scott O, Product Manager Critical Environments, Winnipeg, Canada
We have just purchased two Hamilton Hoods.
~Technical Support/Services, Marquette, MI
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Applications and UseTop

Q:
What are some of the applications you have used fume hoods for?
34 answers
Answers:
Pouring chemicals, running experiments such as Soxhlet extraction with volatile organics (benzene, methanol, iso-propanol, ect.), putting our muffle furnace in a hood to eliminate fumes during combustion.
~Other, McMinnville, OR
I am a chemist - I perform many projects especially process development in fume hoods. My lab has a number of fume hoods for acid work, organics - both analytical and development work.
~Janneke M, Technical Support, Freeport, TX

Multiple acid digestion of metallurgical samples, fusion of metallurgical samples, handling of volatile organic solvents.

~Other, Trail, Canada
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Q:
Please share with us any “non-standard” applications that a fume hood has been used for.
6 answers
Answers:
Jewelry Labs.
~Wally F, Builder/Contractor, Sylmar, CA
Shelling nuts
~Timothy S, Marketing/Sales, Lenexa, KS
The usual worst case - storage of junk.
~Certifier

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of fume hoods?
7 answers
Answers:

Using carbon steel interior hoods for acid digestion applications.  The hood will only last a year or two.

~Timothy S, Marketing/Sales, Lenexa, KS

Using filters on intake of hood and lack of maintenance may lead to fire.

~Tom W, Engineer, Croatia
One of the jobs of the fume hood is to be able to put a fire out, should one ignite, on the kitchen equipment. If the hood is not up to code or is not sized properly, or doesn't function properly, it could lead to a fire and the loss of life.
~Stephen K, Architect, Toronto, Canada
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FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
19 answers
Answers:

Readily available information from fume hood manufacturers on the types and quantities of filtration offered in the fume hood. While many manufacturers offer a chemical gas filter, almost none specify the quantity of filtration media in the filter as well as the depth of the filter bed. These parameters are critical if one is to ensure that chemical vapors are indeed filtered by the system.

~Gershon K, Marketing/Sales, Champlain, NY

Wider fume hoods with more than 1 sash along the width of the fume hood. Better light fixtures, Hoods with a side slit to allow for organized entry of cords, tubes etc. Detachable front ends (do not know the word) ie, make it easier to sweep out a hood.

~Janneke M, Technical Support, Freeport, TX

Lowest operating cost, most energy efficient fume hood. Robust containment. High sight line.

~Timothy S, Marketing/Sales, Lenexa, KS
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Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of fume hoods?
7 answers
Answers:

Many solvent gases are heavier than air and will not move upward through the fume hood.  These gases will drift outward and into the ambient air.  Such gases may include xylene and gluteraldehyde.

~Gershon K, Marketing/Sales, Champlain, NY

Do not select a fume hood that is oversized for your application, or you will unnecessarily increase your energy costs.

~Chris M, Design Engineer, Columbus, OH

Be sure to correctly match type of hood with the prospective use of the hood. One size does not fit all.

~Janneke M, Technical Support, Freeport, TX
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Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using fume hoods?
11 answers
Answers:
Get in-house safety and HVAC involved with design engineers at the start - get buy-in from all concerned to make the right choice and verify system reserve capacity and avoid room pressure and balance issues.
~Certifier
Users of fume hoods should anticipate the need of additional filtration systems to filter vapors from ambient air.
~Gershon K, Marketing/Sales, Champlain, NY
There is no need to have a face velocity that exceeds 100 fpm.
~Chris M, Design Engineer, Columbus, OH
Make sure that the supplier has good specifications and detailed drawings so that an informed opinion can be made, in selecting the most appropriate fume hood.
~Stephen K, Architect, Toronto, Canada
Ask the supplier for special applications or deviations from normal. Suppliers are sometimes more flexible than one thinks. Share your wish list and some wishes may come true.
~Janneke M, Technical Support, Freeport, TX
Talk to the manufacturer and make sure you have a good fit for your application.
~Eugene R, Research & Development, Princeton area, NJ
Check for motor and hood materials compatibility with chemicals.
~R. Sivakumar S, Research & Development, Yorktown, VA
Make sure all options are selected for proper application.
~Philip D, Engineer, Fresno, CA

It is very helpful for work if the motor is sound proof.

~Md R, Laboratory use, Dhaka, Bangladesh
Pick based on performance, and conformance to standards.
~Timothy S, Marketing/Sales, Lenexa, KS
Make sure they are suited for the work and workers.
~Tom F, Facilities Manager, Boulder, CO


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