Questions and Answers about the Fume Hood

1. What are the requirements that must be met for a Fume Hood?

Fume hoods must meet the requirements of the test function, material, design, and functionality. Here are some rules that will regulate Fume Hood condition:

• ANSI-ASHRAE 110 (American Standard for Performance Test)
• ANSI / AIHA Z 9.5
• BS 7258 (British Standard)
• SEFA 1 (Scientific Equipment Furniture Association)
• EN 14175 (European Fume Hood Standard)
• AFNOR NFX 15-211:2009 (French Standard for Ductless Fume Hood)
• SEFA 9 (For Ductless Fumehood)
• BS 7989 (For Ductless Fumehood)

2. Could you give some examples of the above requirements?

As one example, the placement of a Fume Hood in laboratory room is very important, in order to avoid external air turbulance, interference from air intake, air pressure, and others. (see image below)

Please contact us to decide the most suitable location for your Fume Hood !

3. How often does a hood need to be certified?

Unfortunately, there are no Certification Bureau/Agency that could do Fume Hood certification in Indonesia yet. At minimum we recommend to conduct annual certification or test performance of all hoods. PT. RGA could help you do this test performance as we have the ability to do it.

4. What kind of test can PT. RGA provide?

PT. RGA can provide a 7-point inspection for your fume hood based on ANSI-ASHRAE 110. This standard is one of the latest and most comprehensive methods for testing operator safety level of fume hoods. This inspection includes:

  1. General function check: drawers, doors, sash(es), belts and pulleys, monitoring devices, service fixture, dumper, blower motors and bearings
  2. Structural check: liner and structure of hood
  3. Utility check (water, electricity, gas, waste)
  4. Noise level test
  5. Lighting test
  6. Air flow Visualization tests
  7. Face Velocity test

Fume Hood testing can be divided into three stages, namely, “As Manufactured”, “As Installed”, and “As used.”

Please contact us to arrange a Fume Hood test performance schedule !

5. What type of blower or duct does my fume hood need?

Fume hoods vary widely in their application. Choosing the right blower and duct is essential for safety and longevity. We can help you determine the best possible blower and duct for your fume hoods given the application.

6. How do you check Fume Hood’s Air Velocity?

The actual measurement for face velocity of a fume hood is done with a digital electronic anemometer. This device measures the draw of the fume hood in feet per minute (fpm) or meter per second (m/s). For a hood to pass this annual inspection its face velocity must be between 60-120 fpm(*), ideally the goal airflow is 100 fpm. (0.5 m/s).

(*)these parameters differs between different organization standards(OSHA, CAL/OSHA, ANSI, ASHRAE, NFPA, NRC, etc)

7. Do you know about PEL (Permissible Exposure Limit) or TLV (Threshold Limit Value) ?

Inhaling small quantities of chemicals vapors every day may occur severe health effects on the long term for the chemists who work in an environment where a wide variety of chemical agents are used. Even if some chemicals are considered separately not very hazardous, the cumulative effect of several chemicals present in the laboratory air and the synergy effect between chemical molecules can be terribly damaging.

Every chemists should know the Permissible Exposure Limits (PELs) of chemicals published by the OSHA (Occupational Safety and Health Administration in USA) for an average exposure of 8 hours per day and should manage to keep the chemical concentrations in the laboratory air at much lower levels than the PELs, to reduce the cumulative and synergy effects.

Below are the PEL of some common chemicals used in laboratory:

Contact us ! to know more about PEL and the latest OSHA’s PEL chemical list!

8. Can PT. RGA give Fume Hood training to our company?

Sure we could, please contact us to discuss more information about your Fume Hood!