Banner Bank

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Project Overview
  • Owner: The Christensen Corp.
  • Location: 950 W. Bannock Street, Downtown Boise, Idaho
  • Building Type: Speculative Office Building
  • Size: 180,000 Square Feet
  • Completion Date: March 2006
  • Utilities: Idaho Power, Boise City Geothermal

The Banner Bank Building is a model for high performance buildings in the US. Energy efficiency strategies were considered from the whole building scale, such as under floor air distribution (UFAD) with evaporative pre-cooling, to the finest details, such as eliminating light switches in favor of individual computer controls.

With a total of 180,000 square feet, made up of eleven floors, this building added a significant amount of class-A office space to the Boise area and is delivering a high quality environment that uses almost half the energy at typical rental market rates. Due to its enhanced interior environment and competitive lease rates, the building has leased up faster than its competitors.

“We created a beautiful, high-performance building that’s good for the environment. And it didn’t cost us any more to do it.” - Gary Christensen, Owner Christensen Corp.

The art-deco inspired building is the first LEED Platinum building in Idaho, earning 49 out of 62 possible LEED credits in the Core & Shell category. Worldwide, Banner Bank was the 16th Platinum building but the first speculative office building to achieve this level. It earned all ten of the “Optimizing Energy Performance” credits under the Energy and Atmosphere section of the LEED checklist, showing Core & Shell modeled energy savings of over 50%. The building’s Energy Use Index (EUI) is 37 kBTU / FT2•YR as compared to an average office building in Idaho which uses 89 kBTU / FT2•YR. The reduction in energy use offsets approximately 721 tons of CO2 per year-the equivalent of removing 139 cars from the road per year.

Energy efficient strategies of Banner Bank provide additional benefits. The raised floor system that expedited data and power runs during construction, provides tenants with optimum outlet and supply air placement, and is also easy to reconfigure. Modular walls and clear span spaces in combination with the raised floor system minimizes owner churn costs and provides both the owner and tenants tremendous space flexibility.  

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