WUFI - Oak Ridge National Laboratory (ORNL)/Fraunhofer Institute for Building Physics (IBP) is a menu-driven PC program which allows realistic calculation of the transient coupled one-dimensional heat and moisture transport in multi-layer building components exposed to natural weather. WUFI-ORNL/IBP is based on the newest findings regarding vapor diffusion and liquid transport in building materials. The underlying model has been validated for over 20 years.
For more information, please visit http://web.ornl.gov/sci/buildings/tools/wufi/.