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WUFI® is a family of software products that allows realistic calculation of the transient coupled one- and twodimensional heat and moisture transport in walls and other multi-layer building components exposed to natural weather. WUFI® is an acronym for Wärme Und Feuchte Instationär—which, translated, means heat and moisture transiency. WUFI® software uses the latest findings regarding vapor diffusion and moisture transport in building materials. The software has been validated by detailed comparison with measurements obtained in the laboratory and on IBP’s outdoor testing field.

Component simulation and building simulation

The various versions of the WUFI® software family perform coupled heat and moisture calculations under local climate conditions and for materials, multilayer components, and even whole buildings. Through WUFI® simulation of heat and moisture transport, users can, while still in the planning phases, optimize designs and identify risks and problems.



The fundamentals required for practical application of heat and moisture transfer calculations and the application of WUFI® software for building physics investigations are presented in numerous publications by staff at the Fraunhofer Institute for Building Physics (IBP) and by other institutions. The numerous examples of applications that use WUFI®, together with many publications on the topic of hygrothermics, are located here.


Instruction manuals and handbooks

This link leads to numerous instruction manuals and handbooks for users who are just starting with WUFI®, as well for advanced users with specific questions.



The Fraunhofer Institute for Building Physics offers general workshops on WUFI® at regular intervals. There is one workshop for WUFI® beginners and for those with a general interest in WUFI®, and there is another workshop for existing users who want more advanced training. There are separate workshops that focus on WUFI® 2D, WUFI® Plus, and WUFI® Passive. Since WUFI® developers themselves teach the workshops, a high quality experience can be expected.



    Release WUFI® Pro 6.5.3 and WUFI® 2D 4.3.3

    December 3, 2021

    New versions of WUFI® Pro 6.5.3 and WUFI® 2D 4.3.3 with extended material database are now available.

    Users of WUFI® Pro 6 and WUFI® 2D 4 can download the update free of charge. You can use the link you received with your purchase of WUFI® Pro 6 or WUFI® 2D 4. You will also find the link in your account in our online shop under “My Orders”.


    WUFI® Pro video training materials

    December 2, 2021

    As part of our 25th anniversary, we are offering our recorded English lectures of the WUFI basics workshop as an introduction to step into the work with WUFI.

    The films cover the basics of hygrothermal simulation and the knowledge required to use WUFI Pro. The following topics are included:


    WUFI® Video: Program Tour

    December 1, 2021

    In the context of our 25th anniversary, we provide you with our training videos "WUFI® Program Tour".

    The WUFI® Program Tour allows a quick introduction to the program WUFI® Pro. Based on an example the procedure from entering a construction to evaluating the results is shown step by step. Hereby the most important functions are explained as well as the post-process modules are discussed.

    WUFI® Pro Program Tour:


    WUFI® celebrates its 25th anniversary

    July 23, 2021

    Our software family has now been established in the professional world for 25 years and is internationally recognized - planners, building product manufacturers, construction companies and experts from more than 100 countries use the various products of the WUFI® family. The programs are also implemented for research and teaching purposes at numerous educational institutions and universities. Which WUFI® software products exist? How can moisture in buildings be evaluated in practice? What are the basic principles behind hygrothermal simulation, what input data are required and how can the results be evaluated? In this jubilee year, Dr. Simon Schmidt, head of the Department of Hygrothermics at Fraunhofer IBP, will be addressing these questions in various weekly training videos. The institute makes the videos available on the YouTube channel.

    All further information about the anniversary will also be prominently presented on this landing page.


    Survey on the application of hygrothermal simulation software

    June 21, 2021

    You know mould, thermal bridges, algae and frost damage from your daily planning and construction practice?

    Up to now simplified methods such as thermal bridge or the so called Glaser or dew point calculations are mainly used for that purpose. Increasingly, however, more sophisticated hygrothermal simulation programs like WUFI® or DELPHIN are applied.

    However, in practice, planners are often in doubt, which evaluations and proofs of function they need, how they can interpret the simulation results correctly and finally how reliable input data and results are.


Last Update: December 19, 2018 at 9:50