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WUFI® 2D expands the scope of WUFI® Pro to two-dimensional analysis. A one-dimensional WUFI® Pro analysis cannot be used when regions next to the cross-section of interest have different heat and moisture responses. In particular, two-dimensional analyses are necessary for complicated geometries, such as building corners, window locations and foundation connections, and when there are non-uniform sources/sinks of heat and moisture.

Compared to WUFI® Pro, the inputs for WUFI® 2D are considerably more complex, and the computational time is also significantly increasing. Given the ease-of-use of WUFI® Pro, it is most desirable to keep the analysis one-dimensional. Indeed many situations, including those with ventilation and rainwater infiltration, can still be effectively analyzed in one dimension. As such, WUFI® 2D should be more generally thought of as a complement and not an alternative to WUFI® Pro.


Targeted audiences


Zielgruppe Planer

Evaluation of critical connections

Optimization standard construction details for specific situations


Zielgruppe Gutachter

Investigation of damage, particularly in corners, around window frames, and at component connections

Assessment of mold growth associated with thermal bridges

Assigning liability in planning or execution*


Building products companies

Zielgruppe Baustoffhersteller

Development and optmization of products and systems

Assessment/dimensioning of components in a system (e.g., ETICS)

Universities and Technical Colleges

There are special conditions for using WUFI® 2D for educational purposes. Additional information can be found here.

* Upon evaluating damage in existing structures, if the simulation correctly accounts for uncertainty (e.g., driving rain, leaks in ETICS, and/or convective moisture entry with lightweight components) and does not predict damage, then the workmanship is to blame. On the other hand, if the simulation predicts that damage can occur, then poor design is to blame.




Typical Questions

  • Hygrothermal calculations for thermal bridges, particularly if the moisture conditions must be evaluated within the component and not just on the surface
  • Calculation of hygrothermal responses for perimeters and corners
  • Evaluation of hygrothermal responses for lightweight structures with multiple layers of insulation and including components such as rafters and joists
  • Hygrothermal calculations involving components that have materials with directional properties
  • Calculations for radially symmetric line sources/sinks, thus providing three-dimensional hygrothermal results


  • Animation of temporal and spatial distributions of hygrothermal conditions (temperature, relative humidity, water content, heat and moisture fluxes, etc…) shown in WUFI® movies
  • Water content throughout all components for qualitative assessment of the moisture balance (e.g., increasing moisture in winter, drying in summer)
  • Water content determination in individual materials or components to evaluate, for example, instances of mold growth and/or rot
  • Moisture profiles at specific times (e.g., cold winter)
  • Temperature and relative humidity at critical positions or areas and also within components
  • The included evaluation tool WUFI® Graph makes it easy to plot and export desired values for any position


The evaluation of results is the responsiblity of the user and not of the software. Assessing results requires experience and understanding of building science. It is recommended that all users attend a seminar dedicated to WUFI® 2D. The seminars educate users about basic building physics and give confidence for handling the software. In addition, such seminars provide information on new models and evaluation options.


Program details

The demo film demonstrates the use of WUFI® 2D.

The WUFI® 2D user-interface is only available in English.

WUFI® 2D can calculate in SI units.

The multi-language material databank has about 600 pre-defined building materials and can also accept user-defined materials. WUFI® 2D contains climate data for about 149 locations (Europe, North America, South America, Japan, and Oceania).



Last Update: January 18, 2023 at 14:12