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NFPA 555

2017 Edition, January 1, 2017

Complete Document

Guide on Methods for Evaluating Potential for Room Flashover

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Product Details:

  • Revision: 2017 Edition, January 1, 2017
  • Published Date: January 2017
  • Status: Active, Most Current
  • Document Language: English
  • Published By: National Fire Protection Association (NFPA)
  • Page Count: 42
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:

This guide addresses methods for evaluating the potential for room flashover from fire involving the contents, furnishings, and interior finish of a room. The methods addressed by this guide include prevention of ignition; installation of automatic fire suppression systems; control of ventilation factors; and limitation of the heat release rate of individual and grouped room contents, furnishings, and interior finish.

The accuracy, precision, and relevance of this guide are a function of the accuracy, precision, and relevance of the data from the test methods and calculations used. The principles and concepts presented are among the most reliable available.

The use of these techniques can help to minimize the probability of flashover or delay its occurrence, but might not prevent it.


The purpose of this guide is to provide tools for individuals or organizations attempting to implement methods to prevent the occurrence of flashover or, at least, to decrease its probability.

Any limitations on the availability of data, of appropriate test procedures, of adequate fire models, or of state-of-the-art scientific knowledge place significant constraints on the procedures described in this guide.

This guide describes some standard tests conducted under controlled laboratory conditions. Such tests should not be deemed to establish performance levels for all situations.