Fume Hood/ASHRAE 110 Testing

TSS offers comprehensive testing, certification and maintenance of chemical fume hoods. All testing is performed in accord with established TSS SOPs, which are updated to remain compliant with state, federal and international safety guidelines as well as our own ISO 9001 certified quality system. Chemical fume hood testing is performed to comply with regulations and standards set forth by OSHA, AIHA/ANSI, SEFA, NEBB and ASHRAE.

Primary tests include inflow velocity profiling and airflow smoke testing. These tests provide a qualitative analysis of air capture at the face of the unit, thus demonstrating the unit's exposure prevention effectiveness and ensuring operator safety. Tracer gas tests to comply with ASHRAE Standard 110 provide quantitative data evaluating the containment performance of fume hoods.

Additional test options include:

  • Calibration and testing of airflow monitors
  • Local and large volume smoke visualization testing
  • Cross-draft testing
  • VAV (variable air-volume) testing
  • Tracer gas containment testing

Nitrous oxide as a tracer gas

ASHRAE Standard 110, Section 4.1, outlines the use of sulfur hexafluoride, a potent greenhouse gas, for tracer gas testing. Alternatives to sulfur hexafluoride have long been sought due to its contribution to climate change. Technical Safety Services has pioneered the search for alternative tracer gasses. TSS has conducted extensive research into the use of nitrous oxide as an alternative tracer gas, resulting in a ~99% reduction in TSS’ carbon footprint when performing fume hood tests. Our studies have convinced the University of California system, the United States Department of Energy and several other clients to adopt nitrous oxide as a valid alternative tracer gas. Further, TSS’ work provides a roadmap for the qualification of other gasses.

UCR Review of Nitrous Oxide...as it Applies to ASHRAE 110

ASHRAE Interpretation IC 110-1995-1

The following linked article is an Author's Original Manuscript whose final and definitive form, the Version of Record, has been published in the Journal of Occupational and Environmental Hygiene, [12 SEP 2013] [copyright Taylor & Francis], available at the Taylor and Francis website.

Nitrous Oxide as a Tracer Gas in the ASHRAE 110-1995 Standard

Fume hood airflow alarms

In accord with regulatory bodies and in keeping with fundamental laboratory safety, TSS encourages the use of calibrated quantitative airflow monitors in conjunction with any operational fume hood. Such devices are the best way to ensure your chemical fume hood is operating safely and in compliance with regulatory parameters. Contact TSS for more information regarding the benefits of a quantitative airflow monitor over other airflow indication devices.

To better suit your specific needs, TSS offers you a choice in airflow monitors:

TSS Apex Premier

TSS Apex 1000

From fume hood airflow alarms to the latest in ASHRAE testing technology, one call to TSS is all it takes to ensure your facility’s chemical fume hoods are operating safely and efficiently. Contact TSS today at 800-877-7742 or click below to schedule service.

Download fume hood testing information

Download Fume Hood/ASHRAE-110 Testing Information

Schedule service today

Schedule Service Today

OCI Login