Passive:Wufi Passive

WUFI®Passive was developed by the Fraunhofer-Institute of Building Physics (IBP) and the Passive House Institute US (PHIUS) by combining the WUFI®Plus building simulation tool with a Passive House Verification feature to meet the need of Passive House communities worldwide.

In times of decreasing fossil fuel resources, Passive Houses have shown to be an important step towards more efficiency and less energy demand. By using dynamic models and hourly data, WUFI®Passive has an edge against other verification tools, and the implemented WUFI®Plus tool also allows hygrothermal calculation.
The Passive House Verification in WUFI®Passive calculates the energy demand of buildings on montly or annual basis. Thereby transmission, ventilation, radiation and inner loads are considered. The energy gains and losses are balanced and a detailed input (hetaing, ventialtion, HVAC etc) allows the calculation of a total energy demand. Depending on the energy sources used the primary energy consumption is determined.