Ayers Saint Gross strives to make every project as energy efficient as possible. We’re signatories of the AIA2030 Commitment, and each year we report on the predicted energy use intensity of our whole building projects and the lighting power density of our interiors projects. Reducing both advances us toward our goal of designing net-zero projects across our design portfolio by 2030.
To keep our eyes on the prize and recognize Green Week 2017, we’re celebrating two projects – one whole building and one interior – with the Carrot Awards. Too often designers think of sustainability goals as a “stick,” something they have to do that’s at odds with good design. But for us, sustainability is a carrot. It’s something we reach for, something that inspires great design. The projects recognized by this year’s Green Week are examples for design teams across our firm to emulate in pursuit of sustainable design excellence.
This year’s whole building Carrot Award goes to Washington University in St. Louis’s Bryan Hall.
Bryan Hall is the renovation of approximately 49,000 GSF of existing 1968 laboratories for Washington University’s chemistry department. The project reuses more than 60% of the existing structural components while bringing in new building systems, infrastructure, and a vibration-sensitive design to support instrument-based chemistry. Laboratories are an energy-intensive program, but modeling predicts this project will use 55% less energy than the baseline laboratory.
To achieve these energy savings, KJWW Engineering (now IMEG) designed HVAC systems to serve laboratory, public, and restroom spaces separately so systems could be tailored to each type of space’s unique needs. Most of the laboratories require six air changes per hour to maintain high indoor air quality, but heating or cooling that air for once-through use would be very expensive and energy-intensive. To minimize that demand, laboratory exhaust air is routed through a sensible-only heat recovery system which pre-conditions outdoor air before it enters air handling units. Public spaces have different HVAC demands and are provided supply air as required to meet heating and cooling needs.
The building’s two laser research areas require constant temperature and maximum relative humidity conditions. These spaces are served by separate constant-volume air handling units that can optimally meet those conditions. Electrical and IT rooms on each floor are served by a variable refrigerant flow (VRF) system for local space conditioning.
This year’s interiors Carrot Award goes to our tenant improvement work for Tishman Speyer at Park Place, floors six and nine. This commercial office space in Arlington, Virginia includes multiple office suites and decreases lighting power density by 57%, more than double the current AIA2030 reduction target, through LED lighting.
We announced these awards today to kick off Green Week 2017, our firm’s annual celebration of high-performance design and sustainability. The week’s activities include internal and external luncheon speakers, trivia questions on our internal knowledge-sharing platform, and the Carrot Awards to get us inspired to create ever-more energy efficient design solutions.
For more on how Ayers Saint Gross approaches sustainable design, see our firm’s sustainability strategy, Take Action.