Posted on August 31, 2016 by Kent Earle in Guest Blogs
In mid-November 2015, just before we moved into our new house, we were asked to be part of the Passive HouseA 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. Days tour (a worldwide weekend of awareness of Passive House and energy-efficient building). Well, not “officially” — we were asked to be a part of the tour by the event organizer in Saskatchewan, who was the Passive House (PH) consultant on what should become the first certified PH in Saskatchewan. Even though we did not build a PH, we did follow the standards as closely as I could justify. From the beginning we were not pursuing certification.