Comprehensive Laboratory and Chemical Fume Hood Testing
Laboratory and chemical fume hood certification and testing throughout research centers, universities, hospitals, schools, and more.
Our comprehensive services include chemical fume hood testing, certification, and tracer gas testing. All services are provided in accordance with standards set by AIHA/ANSI, SEFA, and ASHRAE.
Annual Fume Hood Certification
Tracer Gas Testing
ASHRAE 110 Testing
Bio Safety Cabinet
Laminar Flow Hoods
Fumehoods and Bio Safety Cabinets
Testing primarily consists of an inflow velocity profile test and smoke containment and visualization tests. These tests should be performed at least annually as part of a lab’s chemical safety management program.
Biosafety cabinet testing is performed in accordance with NSF 49 and includes:
- Inflow velocity testing
- Downflow velocity testing
- HEPA filter integrity testing
- Smoke pattern testing
- Site installation testing
University of Texas Southwestern Medical Center
College of the Holy Cross
University of New Hampshire
Emerson Climate Technologies
Oxford Nanopore Technologies
Texas A&M University Fume Hood Case Study
How often do you need to certify your fume hoods?
Testing and certification of chemical fume hoods should be performed at least on an annual basis. Complete ASHRAE 110 testing is recommended to be performed on new fume hoods as well as anytime changes are made to existing hoods and equipment.
Airflow Velocity Testing
Airflow Velocity Testing measures the speed at which air enters a fume hood’s face opening. It is generally recommended that a fume hood’s face velocity is between 0.3 m/s (60 fpm) and 0.5 m/s (100 fpm).
Smoke Visualization Testing
The smoke visualization test introduces a visible smoke to the fume hood to determine if there is any visible vapor escaping the hood. It also allows a trained technician to identify if there are any eddies or reversals in the air flow inside the hood itself.
Variable Air Volume speed of response testing
The speed of response test measures the speed at which the fume hood can turn on to remove contaniments. If the air flow rate is not re-established within less than 3s after the sash is opened, the safety function of the fume hood temporarily defeated.
Tracer Gas Containment Testing
We use a tracer gas inside the hood to evelauate the performance. We place a mannequin and measure the tracer gas concentration at the breathing zone (BZ) of the mannequin or at the hood opening.
Sash Motion Effects tracer gas Testing
By testing to see the motion of the VAV controls affecting the sash motion, we are able to determine if the fume hood is working optimally.
Does Airadigm Solutions® certify fume hoods?
What safety standard guidelines do you follow?
Can Airadigm provide testing for USP 797 compliance?
Does Airadigm Solutions certify biosafety cabinets?
Can Airadigm test HEPA filters?
Can Airadigm Solutions do ASHRAE 110 testing on our newly constructed fume hoods?
What are eddies and reversals in smoke visualization testing?
An eddy is an area where the air currents swirl around in one place instead of flowing properly out of the hood. A reversal is a localized area where the flow is going in the wrong
direction. Either of these are an indication that the fume hood is not performing to the best of its ability.