Abstract

The paper reports on an energy-simulation-based integrated design and construction process for an up to 90% energy-efficient passive residential case study located in the Utah cold climate zone that was constructed at market rate. Located at an altitude of 7,000 feet, 125 Haus is a compact sized, 2,400 sq.ft. contemporary architectural residence in the Park City area of Utah. The author is the architectural and research leader of an integrated design and construction team that included the general contractor and construction manager, the structural and mechanical engineer, ITAC—the Integrated Technology in Architecture Center at the University of Utah, and the building department of the jurisdiction. Different to the standard, linear design process for residential buildings in the US, the applied IDP (integrated design process) for 125 Haus allowed for constant feedback between team players during the design development and construction process, which was the major prerequisite to become energy efficient and cost-effective at the same time, and to achieve the highest possible market-transferability. With more than 35 energy simulations conducted for energy efficacy and energy-efficient components, 125 Haus’ design process was essentially supported through the employment of energy-modeling software. With rigorous emphasis on a passive design strategy, 90% efficiency over the IECC 2006 code compliant standard was achieved in the simulations. By focusing on standard products and materials of high quality, coupled with common construction methods and the integration of a production builder into the design process, the author expects a broad implementation of this strategy into residential design processes and the future housing market in Northern Utah and beyond.