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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® Plus and WUFI® Passive Update

    April 12, 2017

    The new versions WUFI® Plus 3.1.0 and WUFI® Passive 3.0.1 have been released. Please find an overview of alterations and setup instructions in the update overview.

    Free-of-charge updates are listed on the WUFI® online shop in the section „my orders“. The displayed link allows you to download the respective latest version which can be updated to for free.


    Release of WUFI® 6.1

    March 31, 2017

    WUFI® Pro is now available in version 6.1.

    Users of WUFI® Pro 6.0 can download the update free of charge. You can use the link you received with your purchase of WUFI® Pro 6.0 and you also will see it in your account at our online shop in the "My Orders" menu. When buying a new license of WUFI® Pro, you will directly receive the latest version WUFI® Pro 6.1.


    New add-ons and post processors for WUFI®

    March 31, 2017

    For an extended evaluation in WUFI®, the two new post processing modules WUFI® Corr and WUFI® Mould Index VTT are published together with WUFI 6.1. Further the add-on program "Lokalklimagenerator" allows the adaptation of the new German Hygrothermal Reference Years to differing local conditions.


    Guideline for the hygrothermal simulation of ventilated pitched roofs

    March 27, 2017

    A supplementary version of the guideline for the hygrothermal simulation of ventilated pitched roofs is now online.
    Now it includes:

    • Parameter recommendation for simulating standard cases
    • Settings for simulating constructions with absorbent undercoverage

    Research projekt "Climate models" completed!

    December 6, 2016

    The higher the insulation level of a building component is the less heat is available for its drying. As a consequence of the better airtightness of the building envelope, in addition the indoor air humidity increases. Both together require also higher demands on the moisture protection of the building components. This is increasingly verified by means of a hygrothermal simulations like WUFI®. These methods need appropriate indoor and outdoor climate data. To close the existing gaps, as part of a research project the following topics were investigated




Last Update: July 18, 2017 at 12:59