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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.



    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.


    WUFI® Pro Online Workshop in April (English)

    February 18, 2021

    We are running an online WUFI® Pro basic workshop in English. Following dates and times are planned:

    28th April 2021. 9 a.m. – 10 a.m. CET.  Live interactive session 1
    29th April 2021. 9 a.m. – 11 a.m. CET.  Live interactive session 2
    30th April 2021. 9 a.m. – 11 a.m. CET.  Live interactive session 3

    Inbeetween the sessions you will get lessons to work on your own. Please plan about 4 additional hours before session 2 and 3.

    Participation fee: 500,- Euro per person.

    For further information about this and other workshops please also visit our  workshop page.


    Release WUFI® Pro 6.5.1 and WUFI® 2D 4.3.1

    November 25, 2020

    New versions of WUFI® Pro 6.5.1 and WUFI® 2D 4.3.1 with extended material and climate 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”.

    When buying a new license of WUFI® Pro or WUFI® 2D, you will receive the new version of WUFI® Pro 6.5.1 or WUFI® 2D 4.3.1.


    Release WUFI® Pro 6.5

    August 10, 2020

    Version 6.5 of WUFI® Pro is now available.

    Users of WUFI® Pro 6 can download the update free of charge. You can use the link you received with your purchase of WUFI® Pro 6 and which is displayed in your account at our online shop in the “My Orders” menu.
    When buying a new license of WUFI® Pro, you will receive the latest version WUFI® Pro 6.5.


Last Update: December 19, 2018 at 9:50