EBC Annex 23 Multizone Air Flow Modelling


Status: Completed (1990-1996)

Operating Agent: Dr Helmut Feustel, Lawrence Berkeley Laboratory, USA

Website: www-epb.lbl.gov/comis



The objective of this annex is to study physical phenomena causing air flow and pollutant transport (e.g. moisture) in multizone buildings and to develop modules to be integrated in a multizone air flow modelling system. The system itself shall be user-friendly and structured to be incorporable in thermal building simulation models. Furthermore, special emphasis shall be given to provide data necessary to use the system (e.g. wind pressure distribution, default values for leakage of building components, material properties like absorption and desorption). The comparison between results from the model and from in-situ tests is an important part of this annex.

To reach these objectives the project is structured in three parallel subtasks:


System development (subtask 1 )

Data acquisition (subtask 2)

System evaluation (subtask 3)

Results of these subtasks are addressed to researchers and consultants and will promote an energy efficient design. The participants will undertake a task sharing project involving model development, data acquisition and analytical studies. Expected results are:


Hardware-independent multizone air flow modelling system

User Guide for the modelling system

Data base of reference cases for evaluation purposes

Data base of default input values for use of air flow models

Document on evaluation exercise

Report on sensitivity analysis.

IISiBat can be translated from French as "Intelligent Interface for the Simulation of Buildings" and is a general simulation environment program which has been adapted to house the COMIS simulation software. Because of the flexible nature, many powerful tools and utility programs can be housed within the IISiBat shell. In this way a complete simulation package, from simulation engine and graphical connection programs to plotting and spreadsheet software can be incorporated into one environment program; making it easier to learn and use. For more information about IIsiBat please contact CSTB email: iisibat[at]cstb.fr

Participants: Belgium, Canada, France, Greece, Italy, Japan, Netherlands, Switzerland, USA



Technical Synthesis Report: Multizone Air Flow Modelling (COMIS)
by Peter Warren
UK, Coventry, ESSU, (Air Infiltration and Ventilation Centre), 2000, ISBN 1 902177 15 5, 38 pp
Order Printed Copy £20.00, (Order Code: ANN 23 TSR)  Download

Evaluation of COMIS (2 Parts)

Evaluation of COMIS
Edited by J-M Furbringer, C-A Roulet and R Borchiellini
Switzerland, Lausanne, Swiss Federal Institute of Technology, LESO.PB, Institute of Building Technology, 1996, 137 pp.  Download

Evaluation of COMIS - Appendices
Edited by J-M Furbringer, C-A Roulet and R Borchiellini
Switzerland, Lausanne, Swiss Federal Institute of Technology, LESO.PB, Institute of Building Technology, 1996, 174 pp.  Download

Fundamentals of the Multizone Air Flow Model - COMIS
Edited by Helmut E Feustel and Alison Raynor-Hoosen
UK, AIVC, 1990, 115 pp., (AIVC Technical Note TN 29)
(Available via the AIVC website, free or charge to enquirers in AIVC Member Countries)

COMIS Users' Guide 3.0
Download via the COMIS Website

COMIS Sample Runs
Download via the COMIS Website

Executable Examples for COMIS 3.0
Download via the COMIS Website

COMIS - An International Multizone Air Flow and Contaminant Transport Model
Download via the COMIS Website


COMIS Basic Software

COMERL/COMIS 3.0 (no documentation, no support)

COMERL/COMIS 3.0 (support and documentation of COMERL in German)

IISiBat/COMIS 3.0 (IISiBat User's Guide in English)

Ordering details for all of the above are available at the COMIS Website