Upcoming Changes to the NFPA45 Standard for Ductless Hoods

Jonathan Eisenberg, PE, ARUP
Kenneth Crooks, Erlab, Inc.

Achieving zero net energy laboratories has been proven possible through the use of a host of technologies. One very promising technology, ductless and filtered fume hoods, has been increasing in use. In response to this trend, the Technical Committee on NFPA 45, Standard on Fire Protection for Laboratories Using Chemicals, will complete the latest proposed revisions for public review in October 2021. Attend this session to learn more about the upcoming inclusion of ductless fume hoods in NFPA 45-2023 and the requirements to safely apply, install, use and maintain them.

Filtration and detection equipment requirements will be detailed, along with sprinkler locations, change control, maintenance and other administrative controls, as well as limitations on the use of ductless hoods. Existing standards that have already adopted ductless hoods (e.g. ANSI Z9.5-2012 and CSA Z316.5-2020) will be used as comparators, presenting the similarities and differences.

Learning Objectives

  • Understand the upcoming changes to and requirements for ductless hoods in the pending version of NFPA45;
  • Identify the limitations of ductless hoods and how to safely apply them;
  • Plan and design inclusion of ductless hoods in compliance with the new requirements of NFPA45 standard; and
  • Explain the required administrative controls for safety and maintenance to owners.


Jonathan Eisenberg is an Associate Principal at Arup, Boston. He is Arup's Science Business Leader, Americas Region. Jon has 33 years of fire and chemical engineering experience and is a nationally known expert in industrial, chemical, and laboratory hazard analysis and risk mitigation. Jon is a registered professional engineer (PE) in MA and CT.

Ken Crooks has more than 35 years of experience in commercial and industrial HVAC industries. He works as Director of GreenFumeHood Technology at Erlab. He is a member of ANSI Z9.5, ASHRAE TC9.10, I2SL, NFPA 45, CSA Z316.5, SCUP, and previously served on SEFA's Board of Directors as Vice-Chair. Ken worked at Phoenix Controls, Aircuity and Munters.


Note: Abstracts and biographies are displayed as submitted by the author(s) with the exception of minor edits for style, grammar consistency, and length.