1. INTRODUCTION

In most building physical calculations we need information on areas and volumes to solve the balance equations. Visualization of geometry is important for a good description. This is rather easy in two dimensions as we can make drawing on paper. But in most practical cases we have three dimensional (3D) geometry. Using technology that first was made for computer games on Internet gives better and cheaper methods for 3D visualization. We can place a 3D model on a World Wide Web page that can be accessed from everywhere and you can see the model from the viewpoint you want on your local computer. In the paper Bang and Nielsen 1996 we presented the possibility of using cheep 3D drawing programs. Here I will give an example of the use of 3D room models for moisture balance c alculations.

• building: simulation of building processes : moisture balance calculations

1. Checklists for clean and moisture safe buildings
2. Use of FMEA - failure modes effects analysis on moisture problems in buildings
3. Use of statistics for prediction of risk for condensation in a wall construction cold walls radiation technique: the case of quality of air