© 2019 Fire Protection Research Foundation 1 Batterymarch Park, Quincy, MA 02169-7417, USA Email: foundation@nfpa.org | Web: nfpa.org/foundation Door Messaging Strategies: Implications for Detection and Notification FINAL REPORT BY: Stephen M. Olenick, PE Haavard Boehmer, PE Michael S. Klassen, PE, Ph.D. Combustion Science & Engineering, Inc. Columbia, Maryland, USA October 2019