There are different licenses for the different versions of the WUFI® family of programs. Decide for yourself which license is most suitable based on the duration of your project and on the resources available.

We offer special rates for educational institutions.

License overview

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[P02] What is a 1-, 3- or 5-year license?

The 1- and 3-year licenses are valid for terms of one and three years, respectively, from the date of purchase. During that time, you will receive all updates and upgrades free of charge in the online shop. When the term has elapsed, you can purchase a new 1- or 3- year license. There is no discount on the purchase price. 3- year licenses are only available for WUFI® Passive.

A 5-year license is valid for five years. Updates within the same main version number (e.g. from WUFI® Pro 6.3 to WUFI® Pro 6.4) are always free of charge. New version numbers (upgrades, e.g. from WUFI® Pro 5.x to WUFI® Pro 6.x) will incur an additional fee. The purchased upgrade is then valid for five years. The cost of the upgrade will be shown when you log in to your account in the online shop.

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[P03] Where can I get the WUFI® software?

All WUFI® software, whether for purchase or free of charge, can be found on our product page:

Product page

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[P04] What are the differences between the free and the paid versions?

The most important differences are shown in our product overview. If you need more detailed information, please refer to our detailed product overview.

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[P05] I am interested in WUFI® 2D, do I also have to get WUFI® Pro?

WUFI® 2D is a stand-alone program, so you don’t need WUFI® Pro. If you plan to regularly perform one-dimensional calculations, it is perfectly feasible with WUFI® 2D, but it requires significantly more effort to input the building components compared with WUFI® Pro. On the whole, WUFI® Pro is much easier to use and performs calculations faster – in other words, if you frequently deal with one-dimensional issues, we recommend using WUFI® Pro as well.

Generally speaking, WUFI® Pro, WUFI® 2D, WUFI® Plus, WUFI® Passive are functional independent of one another.

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[P06] What languages are the WUFI® programs and the related online help available in?

	User interface	Online Help / WUFI wiki
WUFI^® Pro	German, Chinese, English, Finnish, Polish, French, Norwegian, Swedish, Spanish, Italian, Portuguese, Czech, Japanese	German, English, French, Japanese
WUFI^® 2D	German, Chinese, English, Polish, French, Norwegian, Swedish, Spanish, Italian, Portuguese, Czech, Japanese, Corean	English
WUFI^® Plus	German, Chinese, English, Italian, Polish	English
WUFI^® Passive	German, Chinese, English, Italian, Polish	English
Material data base (in all WUFI programs)	Chinese, English, Finnish, Polish, French, German, Norwegian, Swedish, Spanish, Italian, Portuguese, Czech, Japanese	German, English, Japanese
WUFI^® Graph	German, English	German, English
WUFI^® Bio	German, English, Italian, Japanese	German, English
WUFI^® Corr	German, English, Italian	English
WUFI^® Mould Index VTT	English	English

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[P07] Have the WUFI® programs been validated?

Yes. Each of the four WUFI® programs has been validated multiple times. For more information, please see Software -> Validation.

Validation

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[P08] How long does a typical simulation take?

This is a difficult question to answer because it depends on the complexity of the building component/building, the general conditions, the grid, etc. The table below gives only approximate values. WUFI® Pro and WUFI® 2D assume a calculation period of 5 years. WUFI® Plus and WUFI® Passive use a period 1 year.

	Simple component / building	Complex component/building
WUFI^® Pro	2 min	30 min – 1 hour
WUFI^® 2D	45 min	6 – 10 hours
WUFI^® Plus	5 min (1 zone)	10 – 18 hours (various zones including air-flow-model and detailed HVAC)
WUFI^® Passive	Static passive house calculation result: immediately available Hygrothermal calculation: 5 min (1 zone)	Static passive house calculation result: immediately available Hygrothermal calculation: 10 – 18 hours (various zones including air-flow-model and detailed HVAC)

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[P09] How long does it take to input a typical project?

This largely depends on how experienced the user is. The following table assumes an experienced user.

	Simple component/building	Complex component/building
WUFI^® Pro	5 min	15 min
WUFI^® 2D	15 min	60 min
WUFI^® Plus	15 min	2 - 10 hours
WUFI^® Passive	30 min	2 - 10 hours

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[P10] How large will the project file be?

	Simple component/building	Complex component/building
WUFI^® Pro	10 MB / year	20 MB / year
WUFI^® 2D	2 GB	10 - 20 GB
WUFI^® Plus	Project file 2 MB Result file 50 – 100MB	Project file 10 MB Result file 1 – 10 GB
WUFI^® Passive	Project file 2 MB Result file 50 – 100MB	Project file 10 MB Result file 1 – 10 GB

In WUFI® 2D, data is not stored in a project file, but in a project directory (folder/sub-directory). The folder contains multiple files. By default, some detailed building component results aren’t saved, but users can change this setting. In WUFI® Plus and WUFI® Passive, projects are split into two files: a project file and a results file.

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[P11] Can I run multiple simulations in parallel?

WUFI^® Pro	Yes. You can open and work on multiple instances of the program, or you can have it automatically calculate different variations in succession.
WUFI^® 2D	Yes. It isn’t possible to open multiple instances of the program, but you can use a command line prompt (batch mode) to simultaneously run multiple variations, which are then processed in succession. You can also start run command line prompts in parallel, but it is advisable to use only as many as there are CPU cores (see http://www.wufi-forum.com/viewtopic.php?f=15&t=399).
WUFI^® Plus	Yes. You can open and work on multiple instances of the program, or you can have it automatically calculate different variations in succession (batch mode). Detailed instructions for using batch mode can be found in the manual.
WUFI^® Passive	Yes. You can open and work on multiple instances of the program.

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[P12] What results do the programs output?

You will find detailed information on the respective program pages under Application -> Results or by following one of the direct links below:

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[P13] How difficult is it to use the software? Do I have to attend a seminar?

An easy-to-use graphical interface and various integrated help functions assist users with data input. In addition, some input fields are preset with standard values, or values can be selected from a drop-down list. The software checks whether the required inputs are complete and also checks the ranges of the input data. In addition, WUFI® Plus provides interactive Tooltips (explanation, recommended values, literature) when moving the mouse over certain parameters.

Nevertheless, it is the user who evaluates the results, not the software. This evaluation requires an understanding of and experience in building physics. We therefore recommend attending appropriate seminars to become familiar with the fundamentals of building physics and the use of the software, and to learn about new models and evaluation possibilities.

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[P14] Can I use WUFI® Plus to perform a complete energy building simulation?

Yes. For more information, please visit Software -> Validation.

Validation

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[P15] Where can I find help for using the software (manual, tutorials, specific questions)?

You will find a summary of the available help options under Service & Support -> Support

Support

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[P16] How can I sign up on the forum?

Use your license details (name, organization, license key) to sign up on our WUFI® forum. There you will find extensive information, tips, and articles on WUFI® both from the WUFI® team and from our users around the world.

WUFI® Forum

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WUFI® databases (climate, material, design, building component)

[D01] What weather data does WUFI® provide?

The following weather data is available in the WUFI® database (only in the full versions):

The Argentinian climate file is for Buenos Aires.
The 3 Austrian climate files are for Vienna, Graz, Innsbruck.
The 3 Belgian climate files are for Brussels, Oostende, Saint Hubert.
The 9 Canadian climate files are for Calgary, Edmonton, Montreal, Ottawa, Quebec, St. John’s, Toronto, Vancouver, Winnipeg.
The Chilean climate file is for Santiago de Chile.
The Czech climate file is for Hradec Králové.
The 4 Finnish climate files are for Espoo, Helsinki, Jyväskylä, Sodankylä.
The 6 French climate files are for Bordeaux, Brest, Grenoble, Marseille, Nancy, Trappes.
The 8 Italian climate files are for Bolzano, Enemonzo, Mailand, Modena, Tarvisio, Trieste, Turin, Udine.
The 7 Japanese climate files are for Akita, Sapporo, Miyazaki, Naha, Niigata, Tokyo, Yokohama.
The 14 New Zealand climate files are for Auckland, Dunedin, Hokitika, Christchurch, Kaitaia, Lauder, Napier, Nelson, New Plymouth, Queenstown, Rotorua, Ruakura, Taurango, Wellington.
The 12 Norwegian climate files are for Bergen, Gardermoen, Kise pa Hedmark, Karasjok, Kristiansand, Kristiansund, Mo i Rana, Oslo, Roeros, Tromsoe, Trondheim, Vaernes.
The 3 Polish climate files are for Kolobrzeg, Krakow, Warsaw.
The Portuguese climate file is for Lisbon.
The 55 US-American climate files are for Albany NY, Albuquerque NM, Amarillo TX, Anchorage AK, Atlanta GA, Baltimore MD, Billings MT, Birmingham AL, Boston MA, Boulder CO, Buffalo NY, Casper WY, Charleston SC, Chicago IL, Cleveland OH, Des Moines IA, Detroit MI, El Paso TX, Elko NV, Fargo ND, Fresno CA, Honolulu HI, Houston TX, Indianapolis IN, International Falls MN, Jacksonsville FL, Kansas City MO, Knoxville TN, Las Vegas NV, Lexington KY, Little Rock AR, Los Angeles CA, Madison WI, Memphis TN, Miami FL, Minneapolis MN, Nashville TN, New Orleans LA, New York City NY, Oklahoma City OK, Omaha NE, Philadelphia PA, Phoenix AZ, Pittsburgh PA, Providence RI, Roanoke VA, Salt Lake City UT, San Antonio TX, San Diego CA, San Francisco CA, Seattle WA, Spokane WA, St. Louis MO, Tampa FL, Wilmington NC (one cold and one warm year for each).
The 5 Spanish climate files are for Barcelona, Bilbao, Madrid, Malaga, Palma.
The 12 Swedish climate files are for Borlänge, Göteborg, Karlstad, Kiruna, Luleå, Lund, Norrköping, Östersund, Stockholm, Umeå, Visby, Växjö.
The 3 Swiss climate files are for Davos (warm/cold), Locarno (warm/cold), Zurich (warm/cold).
The 12 German test reference years (1986 edition) are for Bremerhaven, Hannover, Essen, Trier, Würzburg, Frankfurt/M., Freiburg, Augsburg, München, Stötten, Hof, Friedrichshafen.
The 15 German test reference years (2004 edition) are for Bad Marienberg, Braunlage, Bremerhaven, Chemnitz, Essen, Fichtelberg, Garmisch-Partenkirchen, Hamburg, Hof, Kassel, Mannheim, Passau, Potsdam, Rostock, Stötten (cold/average/warm files for each).
Further German climate files are provided for Holzkirchen (2 data sets).

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[D02] Can I add additional weather data?

Yes. It is possible to add additional weather data to the database in the full versions of the WUFI® programs. This applies to both hourly measurement data for hygrothermal calculations and monthly average values for passive-house design in WUFI® Plus and WUFI® Passive.

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[D03] Where can I get weather data?

Weather data that is not yet integrated in the WUFI® programs by default can be obtained from third-party providers such as Meteonorm, Energy Plus, and ASHRAE. You can also create your own weather files.
Instructions for this can be found in Service & Support -> Downloads and in the online help section.

Downloads

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[D04] Can I add/change database entries (material/design)?

Yes. You can change, add and save data in the full versions.

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[D05] Where can I get data on materials?

WUFI® includes an extensive material database, and you can integrate additional data yourself. Data can be taken from material data sheets, or it can be provided by manufacturers, by our institute or by other institutes.

We would be happy to provide you with a quote for such data. If interested, please contact us at support@wufi.com.

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[D06] Will my databases be preserved when I install an update?

Yes, custom database entries will be retained.

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[D07] Can I exchange my own material data with other users?

Yes, simply go to Export –> XML-file -> Import.

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Purchasing and payment

[K01] Where can I get WUFI®?

The sale of WUFI® licenses is handled through Cleverbridge: Visit the product page.
For questions regarding sales, please contact Cleverbridge directly.

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[K02] How is WUFI® delivered? Will I receive a CD?

WUFI® is offered exclusively as a download. CDs or printed manuals are generally not shipped, but you are welcome to burn a backup copy of the installation file to a CD.

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[K03] Do you offer a discount on the purchase of multiple WUFI® programs?

Yes. With Cleverbridge, the price including the discount is displayed automatically. The discount is based on the products in the shopping cart.

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[K04] How do I pay in the online shop?

Cleverbridge offers various payment methods, such as credit card, PayPal, etc.

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[K05] How long will it take to receive the program?

When you purchase with a credit card, you will usually receive the download link and license number by email immediately. For purchases on account, the license information will be sent after payment has been received.

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[K06] Do you offer reduced prices for resellers?

No, WUFI® can only be obtained through Cleverbridge; the license terms generally do not allow resale (T&Cs §2).

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[K07] Can I resell an unneeded license?

No, our license terms generally do not allow resale (T&Cs §2).

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[K09] Where can I find the software terms and conditions?

Terms & Conditions

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[K10] Do you offer educational licenses?

Information about educational licenses can be found on the product page under Uni/Student.

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[K11] How much does WUFI® cost? Can you send me a quote?

The prices of the individual programs can be found here: Prices
You can generate quotes after clicking the corresponding purchase link directly under the Cleverbridge shopping cart (go to the product page).

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[K12] How much does a WUFI® program update or upgrade cost?

Updates within the same major version number are always free (e.g. WUFI® Pro 7.0 to WUFI® Pro 7.1). For a new major version number, upgrade fees apply to 3- and 5-year licenses (e.g. from WUFI® Pro 6.x to WUFI® Pro 7.x). Upgrades can be purchased until the end of the term of the respective version. The applicable upgrade costs can be found under Prices.

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[K13] How can I update or upgrade my program?

Free updates can be downloaded via the link you received when you purchased your license. Paid upgrades can be purchased through Cleverbridge (see Upgrades.

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[K14] Where can I see the prices in US-Dollar or other currencies?

Cleverbridge offers payment in your local currency. You can select the currency above your shopping cart.

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System requirements and installation

[S01] What hardware is recommended?

Information on system requirements can be found here:

System requirements

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[S02] Which operating systems does WUFI® run on?

WUFI® runs only on Windows operating systems. For computers using MAC OS, UNIX or other operating systems, it is possible to use Windows in a virtual environment and to install WUFI® on that (this may incur costs for any third-party programs that may be required).
Furthermore, operability is not guaranteed, especially if a processor other than AMD64 architecture is used. For this reason, we cannot provide support in case of problems.

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[S03] How do I install WUFI®?

Extract the downloaded .zip file to a folder, then open the installation program „install_wufi***.exe“. Follow the instructions in the program.

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[S04] Why is the „Next“ button grayed out during the installation process?

All three input fields (name, organization and license key) must exactly match the details in your e-mail for the next button to work. It’s best if you copy the details from the e-mail and paste it into these fields. Also make sure there are no extra spaces before or after your entries.

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[S05] Is an automatic installation possible (silent installation)?

Automatic installation is possible (not for WUFI® Plus and Passive), but we offer this option only to customers who purchase multiple licenses (at least ten). For more information, please contact our support team: support@wufi.com

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[S06] Is a network installation possible?

WUFI® is sold only as a single-user license. There are currently no plans to offer a network installation. However, in case of multiple licenses and if you are somewhat experienced with Windows, it is possible to store the database in such a way that it can be shared by multiple PCs. If you have any questions in this regard, please contact support@wufi.com.

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[S07] How many PCs can I install/use WUFI® on?

You may install WUFI® on one PC and one Laptop. A simultaneously use is only allowed as many times as you own licenses.

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[S08] Where can I enter my new license key?

If you received a temporary license key and now want to enter the new one, you must relaunch the installation and enter the new license key during installation process. You do not need to uninstall WUFI® first.

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[S09] Why can’t I find the database after installation?

Before you begin installation, you must extract the downloaded .zip file to a folder. Otherwise, the database won’t be found during installation. For more information on this, please refer to readme.txt in the .zip file. Extract all files to a folder, then run install_wufi****.exe again.

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Last Update: October 01, 2025 at 11:49