Hybrid Water Mist Fire Protection Systems
Peter Raia, University of Maryland
Michael Gollner, University of Maryland

Format: Audio MP3 Download: $18
Audio Compact Disc: $23

"Hybrid" extinguishing systems are not currently addressed in NFPA standards. These systems are unique because they use an inerting gas such as nitrogen as well as fine droplets of water (or clean agent) typical of water mist systems. FM Global has developed Approval Standard 5580 and also determined that the oxygen concentration is not depleted enough to classify this as a clean agent, though it doesn't show all of the same characteristics as a standard water mist system. This session will review how these systems function and the Fire Protection Research Foundation/University of Maryland project to gather information that will provide guidance on where these systems could best be addressed within NFPA documents.