Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Consolidated Compartment Fire Model (CCFM) Computer Code Application CCFM.VENTS. Part 1. Physical Basis (NISTIR 4342)



Leonard Y. Cooper, Glenn P. Forney


A project was carried out at the National Institute of Standards and Technology (NIST) to study the feasibility of developing a new-generation, multi-room, compartment fire model computer code, called the Consolidated Compartment Fire Model (CCFM) computer code. The idea was that such a code would consolidate past progress in zone-type compartment fire modeling, and allow readily for integration of future advances with the greatest possible flexibility. The project lead to the development of a prototype multi-room CCFM product called CCFM.VENTS. This is Part 1 of a four-part report which documents the above effort. Introductory remarks discuss the generic features of the CCFM and the specific features of CCFM.VENTS. The main objective of this Part 1 document is to present a comprehensive description of the governing equations of CCFM.VENTS and their technical basis. The other three parts of this report are: Part 2: Software Reference Guide; Part 3: Catalog of Algorithms and Subroutines; and Part 4: User Reference Guide.
NIST Interagency/Internal Report (NISTIR) - 4342
Report Number


computer models, building fires, compartment fires, fire models, mathematical models, vents, zone models


Cooper, L. and Forney, G. (1990), Consolidated Compartment Fire Model (CCFM) Computer Code Application CCFM.VENTS. Part 1. Physical Basis (NISTIR 4342), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 24, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created July 1, 1990, Updated June 2, 2021