{"id":62178,"date":"2014-11-26T11:02:00","date_gmt":"2014-11-26T11:02:00","guid":{"rendered":"http:\/\/leedpoints.com\/?guid=8526fb0f78eed88b6af00f58ce7652be"},"modified":"2014-11-26T11:02:00","modified_gmt":"2014-11-26T11:02:00","slug":"the-principles-uses-and-limitations-of-wufi","status":"publish","type":"post","link":"https:\/\/leedpoints.com\/green-building-blog\/the-principles-uses-and-limitations-of-wufi\/","title":{"rendered":"The Principles, Uses, and Limitations of WUFI"},"content":{"rendered":null,"protected":false},"excerpt":{"rendered":"
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\n Hygrothermal analysis examined at Building Science Corporation’s Expert Session <\/div>\n<\/p><\/div>\n<\/div>\n
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p title=”his Passive House<\/span>A residential building construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. Developed in the early 1990s by Bo Adamson and Wolfgang Feist, the standard is now promoted by the Passivhaus Institut in Darmstadt, Germany. To meet the standard, a home must have an infiltration rate no greater than 0.60 AC\/H @ 50 pascals, a maximum annual heating energy use of 15 kWh per square meter (4,755 Btu per square foot), a maximum annual cooling energy use of 15 kWh per square meter (1.39 kWh per square foot), and maximum source energy use for all purposes of 120 kWh per square meter (11.1 kWh per square foot). The standard recommends, but does not require, a maximum design heating load of 10 W per square meter and windows with a maximum U-factor of 0.14. The Passivhaus standard was developed for buildings in central and northern Europe; efforts are underway to clarify the best techniques to achieve the standard for buildings in hot climates.<\/span> conference keynote address”>Dr. Joseph Lstiburek started it in 2012 when, in his keynote address at the Passive House conference<\/a>, he said igloos were the first passive houses and you don’t need WUFI,1<\/sup><\/a> the hygrothermal<\/span>A term used to characterize the temperature (thermal) and moisture (hygro) conditions particularly with respect to climate, both indoors and out.<\/span> modeling tool, to design and build a good house. Dr.<\/p>\n

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