Three NW Projects Make COTE Top 10+1 List
Three NW Projects Make COTE Top 10+1 List
The Northwest does it again. This time two buildings made it into the AIA Committee on the Environment Top 10 Green Projects and one was selected the Top Ten Plus winner, now in its third year, that recognizes a past AIA COTE Top Ten Project Award recipient which has quantifiable metrics that demonstrate the true impact the sustainable design has achieved. This year’s Plus project, the Federal Center South Building 1202, was previously selected in 2013 as a recipient of the AIA/COTE Top Ten Project Award. The AIA COTE Top 10 is one of the most prestigious recognition programs for high performance sustainable buildings. Here are some highlights of this year’s Northwest winners.
Bullitt Center (Seattle)
Integrated design team included Miller-Hull Architects and PAE Engineers
This six-story 52,000 sf office building is the first and largest commercial structure to pursue the rigorous requirements of the Living Building Challenge, with Net-Zero performance using only as much water and energy as it takes in on site. With efficiency strategies minimizing the loads, 100% of the remaining power needs comes from the rooftop solar array on an annual basis. A highly efficient envelope, heat recovery ventilation, solar shading, plus passive cooling from natural ventilation, combine to reduce the building’s heating and cooling demand. Remaining loads are met with an extremely efficient ground source heat pump system for radiant heating and cooling and a lighting power density less than half allowed by code (0.4 W/sf). Daylighting is the primary lighting source. An innovative, first of its kind “metered efficiency” purchasing agreement is being used by Seattle City Light to buy the power saved monthly through efficiency.
Collaborative Life Sciences Building for OHSU, PSU & OSU (Portland)
Integrated design team included SERA Architects with CO Architects and Interface Engineering.
A new allied health, academic and research building, the CLSB provides academic classrooms, lecture halls, teaching laboratories, clinical skills and simulation laboratories, medical research laboratories, retail space, and two levels of underground parking. Together, they comprise 650,000 gross square feet in two wings – one 5-story and one 12-story – joined by a central atrium. Located on a brownfield site, the CLSB is certified Platinum under the LEED NC v2009 rating system and incorporates a number of sustainable design innovations. They include: transformation of an existing brownfield, light-pollution reduction, eco-roofs to reduce stormwater runoff, non-potable water for toilet flushing, atrium heat recovery, and salvaging oil drilling pipes for use as foundation piles. And by incorporating energy efficiency measures throughout, CLSB is predicted to save 45% more energy than a typical code building would. A number of design elements contribute to these savings, including high-performance lighting, daylighting and occupancy controls, low ventilation fume hoods, and an improved building envelope.
Federal Center South Building 1202 (South Seattle)
The integrated design-build team included Sellen Construction, ZGF Architects and WSP engineers.
This 209,000 sf Recovery Act funding project had an imperative to “prove the performance”: delivering a 21st Century workspace for the U.S. Army Corps of Engineers (USACE) through a fully integrated fast-tracked project process and meeting outstanding high performance green building benchmarks, including contractually guaranteed energy performance. Following a one-year Measurement and Verification (M&V) period conducted by the design-build team, the project has established that energy performance is meeting the goal, over 30 percent better than ASHRAE 90.1. The first year energy performance, including the commissioning period, was an EUI of 25.7 kBTU/SF/yr. The integrated design-build process was essential to the overall ecologic success to the project, including attaining LEED Platinum certification. Bioclimatic passive load reduction strategies enabled the use of hydronic radiant conditioning and decoupled ventilation through underfloor air diffusers. The mechanical system utilized a ground source heat pump with an eutectic salt phase change material tank and heat recovery chillers. The narrow floor plate optimizes daylight penetration
Full details about these and all COTE winners can be found here.