Fume Hood Selection

Prior approval from Facilities Services and Environmental Health & Safety is required when purchasing a chemical fume hood at Tulane. This is to ensure that the chemical fume hood meets certain design criteria and that there is properly designed exhaust ductwork/exhaust fans/ventilation equipment in place to support operation of this equipment. The following is a list of specifications which all fume hood purchase requests should include as a minimum:

Fume Hood Selection

Please be advised that plans and specifications for all fume hoods at Tulane must be submitted to OEHS for review and approval prior to purchase and installation. To assist in selecting a hood, please note the following:

1. The face velocities on a hood must be as follows:

Chemical Fume Hood - 100 feet per minute (fpm) average, with + or - 20 fpm
Radiological Fume Hood - 125 fpm average, with + or - 10% variation.

2. An air flow indicating device approved by OEHS must be installed on each fume hood. It should be visible on the front panel of the hood.

3. The hood should have side baffles. The hood should have adjustable interior baffles, preferably with a remote baffle adjustment device located on the front of the hood rather than inside. If a hood is chosen with fixed baffles, the researcher must acknowledge that he or she is aware that the baffles can not be adjusted for work with fumes that are heavier or lighter than air.

4. Hoods should have sash stops.

5. Hoods should be of non-combustible construction and should have non-asbestos liners. If sections of a hood are combustible, then they must have a Class A Interior Finish.

6. If radioactive Iodine-125 is to be used, than an approved radiological fume hood with a HEPA filter must be installed. Stainless steel is usually the lining material recommended for radioisotope hoods.

7. A vacuum breaker must be installed on all serrated tip faucets.