Building Science Corp. and PHIUS to Collaborate
Passive House Institute U.S. foresees a ‘synergistic relationship’ with the influential building science consulting firm
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. Institute US sees closer ties ahead with Massachusetts-based Building Science Corp., the widely respected building consulting firm ledLight-emitting diode. Illumination technology that produces light by running electrical current through a semiconductor diode. LED lamps are much longer lasting and much more energy efficient than incandescent lamps; unlike fluorescent lamps, LED lamps do not contain mercury and can be readily dimmed. by Betsy Pettit and Joseph Lstiburek, in the development of new standards for energy efficient housing.
According to Katrin Klingenberg, the executive director of PHIUS, the Building Science Corp. will help PHIUS develop a new Passive House standard that is more appropriate for North American climates than the Passivhaus standard developed in Darmstadt, Germany, by Dr. Wolfgang Feist.
Building Science Corp. has been an important partner in the U.S. Department of Energy's Building America and Challenge Home program, and Building Science President Pettit said the two organizations could help each other as Challenge Home "ratchets up" its requirements and PHIUS works on climate-specific standards.
"This is great news on multiple fronts," PHIUS said in a news release. "It brings Building Science Corporation's industry-leading expertise and resources to passive research. It marks the US DOEUnited States Department of Energy.'s continued support for making passive the basis for future energy efficiency efforts. It continues the momentum of moving passive from novelty to best practice and into the mainstream market."
Energy efficiency goals are converging
The proposed PHIUS standard, like its German Passivhaus counterpart, will set requirements for energy consumption and airtightness. Klingenberg said by telephone that PHIUS is working toward three or four standards that are tailored more precisely to different climates zones. The current standard of both the European and U.S. programs is suitable for a moderate, heating-dominated climate zones, she said, but not necessarily for the diversity of climates in North American.
The first draft of a new PHIUS standard better adapted to North American climates is due to be released for public comment and peer review in September 2014, Klingenberg said, and the collaboration with Building Science Corp. would represent a "synergistic relationship" as it moves toward the goal.
Pettit said the common goal of the PHIUS and Challenge Home programs is to find the lowest cost, highest performing assembly of building materials by climate zone. She called that the "sweet spot" of cost optimization, something that needed periodic review as costs and building materials both change.
Thu, 12/05/2013 - 11:02
Wed, 12/11/2013 - 23:51