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  • On-demand Webinar

Comparing Antifreeze Solutions in Fire Sprinkler Systems

Gain insights on differences in the effectiveness of glycerin and propylene glycol antifreeze solutions as compared to water in fire sprinkler systems.

Fire sprinkler system

In 2009, a fire incident in Truckee, California raised concerns regarding the ignitability and combustibility of high concentrations of antifreeze solutions that were used in sprinkler systems for more than 60 years. This incident involved a cooking oil fire in a kitchen where a sprinkler system with a high concentration of a glycerin antifreeze solution deployed and reportedly caused an explosion that resulted in a fatality as well as a serious injury.
The research covered by this presentation was undertaken to develop data and information to better understand the ability of certain glycerin and propylene glycol antifreeze solutions to effectively control a fire in a light or ordinary hazard occupancy when discharged from a standard spray sprinkler. Data generated from this research included information on the temperatures measured at the ceiling and a determination of the number of operated sprinklers during specific fire scenarios.

Learning objectives:

In this on-demand webinar, you will learn:  

  • The history of antifreeze and NFPA standards  
  • Legacy solution research  
  • Recent UL research  
  • Current listing requirements and limitations


Kerry M. Bell, P.E.
Principal engineer and corporate fellow

Jeff Hebenstreit
Principal engineer and distinguished member of technical staff 

Webinar date:

November 2020

Watch the on-demand video

Antifreeze solutions in fire sprinkler systems



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