The company that develops WUFI energy modeling software has released an update, WUFI Passive 3.0, as well as a version without all the bells and whistles that can be downloaded for free.
WUFI Passive incorporates the new climate-specific standards of the Passive House Institute U.S. (PHIUS). It also includes updated inputs for lighting and plug load calculations, advanced geometry import options and calculations for appliance exhaust air, according to an announcement from the developer, Fraunhofer IBP.
The free version, which can be downloaded from the Fraunhofer IBP site, doesn’t provide all of the functions of the full version. Calculations for moisture transport and storage, for example, aren’t included, according to the company.
It does, however, include full Passivhaus modeling in the “static” mode, says Mike Knezovich of PHIUS, and it’s capable of certifying a project under the PHIUS+ standards. “It’s a great way to get a feel for WUFI Passive,” he said by email. “It may be all some folks ever need. Others will license the full-functioning version, especially folks that do a lot of projects or large-scale projects.”
The full version is listed for sale at 460 Euros for a one-year license, 1250 Euros for a three-year license.
PHIUS said in its announcement that Fraunhofer IBP collaborated with PHIUS and Owens Corning to develop WUFI Passive, and the result was a program suited to North America’s varying climate zones.
“WUFI Passive dramatically improves the quality and efficiency of the design process for Certified Passive House Consultants,” PHIUS said.
Fraunhofer IBP developer at PHIUS conference
PHIUS also announced that Dr. Hartwig M. KÃ¼nzel, a building scientist and creator of WUFI, will be the keynote speaker at its North American conference in September.
KÃ¼nzel is a lecturer in civil engineering at Stuttgart University and has published more than 300 scientific articles in trade journals and text books. He has served on a number of standards committees, PHIUS said, including ASHRAE.
The conference takes place in Chicago from Sept. 9 to 13. Early bird registration is available through July 15.
Sam Rashkin, chief architect of the Building Technologies Office in the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy, will deliver the closing address.