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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.



    Early-Bird-Upgrade: 10 % discount until end of January 2018

    December 18, 2017

    For our users of older WUFI® 10-year licenses, we are offering an early-bird discount of 10% for the upgrades to WUFI® 2D 4 and also WUFI® Pro 6 until the end of January 2018!




    Release WUFI® 2D 4.0

    December 18, 2017

    The new version 4.0 of our hygrothermal simulation software WUFI® 2D can now be obtained at the online shop. Version 4.0 shows many new features and improvements:


    Reduced Prices for WUFI® Plus and WUFI® Passive until end of 2017!

    December 12, 2017

    Prices for WUFI® Plus and WUFI® Passive are reduced by 10% in our online shop until the end of the year.

    WUFI® Plus is the most complete heat and moisture simulation tool in the WUFI® software family. In addition to simulating hygrothermal conditions in building components, WUFI® Plus simulates the indoor environment and is therefore suitable for addressing comfort and energy consumption in buildings.


    Support Packages - We support you with your questions

    December 11, 2017

    When purchasing a product from the WUFI® family, only technical support is included (questions about installation, program errors, etc.). Now we have extended this offer due to multiple requests from our clients!

    As of now you can also purchase WUFI® support packages in our online shop.


    Moisture in buildings – Highly relevant all over the world

    October 12, 2017

    Moisture management in buildings is a trending topic, as moisture related problems not only affect old buildings, but energy efficient new ones as well. In the United States, roughly 50% of all households reported the prevalence of dampness and mold.  European households discovered these same issues, reporting them in about 20% of households.

    The Fraunhofer Institute for Building Physics IBP has conducted research in this field for many years, and is dedicated to solving to these problems by providing software, experience, and solutions to organizations such as ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers). With contributions of Fraunhofer experts, a new chapter on moisture management in buildings was developed for ASHRAE’s Handbook of Fundamentals.




Last Update: January 18, 2018 at 10:03