Chartwell School was chosen as the top award winner for its overall design quality and for its goal of achieving net-zero annual electricity consumption by relying on a number of energy-efficient strategies, including the use of photovoltaic solar cells to generate electricity. The University of California, Berkeley Center for the Built Environment's (CBE) annual Livable Building awards recognize excellent design, operation, and occupant satisfaction.
Livable Buildings honorable mentions go to the Cohos Evamy Toronto Studio on the 10th floor of a Toronto high-rise and to the renovated William P. Robinson Building at Norfolk State University in Norfolk, VA.
To qualify for the Livable Buildings competition, a facility must be among the highest ranked buildings in CBE’s Occupant Indoor Environmental Quality Survey. A building has to score in the top 50 percent in occupant satisfaction in areas such as air quality, lighting, acoustics, and thermal comfort, and must place in the top 25 percent of survey responses for overall building satisfaction.
Scott Shell, principal and director of sustainability at EHDD Architecture in San Francisco, says that CBE’s work and the survey has been a powerful influence. “The results for the many projects surveyed have taught us to pay close attention to acoustics, as well as the other issues that are so clearly articulated.”
“These buildings are well-liked by their occupants, as determined by CBE’s occupant survey,” says CBE Director Edward Arens, director of UC Berkeley’s Center for Environmental Design Research and a UC Berkeley architecture professor. “In effect, we’re giving the occupants a chance to vote on their buildings, which makes this award unique.”
The Chartwell School campus scored in the 98th and 99th percentiles for air quality and thermal comfort, the 75th percentile for acoustic quality, and the 86th percentile for overall building satisfaction.
The school building’s features include tall, north-facing windows that control enough light and heat gain to reduce the school’s need for electricity by 50 percent. In addition, classrooms and many other areas in the building rely on naturally occurring convection currents rather than noisy, high-maintenance, energy-hungry ventilation systems.
Officials at the school for children with learning challenges say their strong environmental focus also extends to Chartwell’s academic curriculum – through the incorporation of its sustainable designs, meandering trails, and native vegetation among its teaching tools – and to interactions between the school and the neighboring community.
Designed by EHDD Architecture and Taylor Engineering, the American Institute of Architects’ Committee on the Environment included Chartwell on its list of Top 10 Green Projects for 2009. Chartwell became the first school in California to earn the LEED Platinum status by the USGBC in 2007.
The Chartwell School was designed for net-zero annual electricity consumption through reliance on highly energy-efficient design strategies and the use of photovoltaic cells to generate electricity equal to the building’s electricity use. Once it opened, however, it encountered unexpected energy challenges that were discovered through the design team’s ongoing monitoring and commissioning efforts.
Cohos Evamy Toronto Studio
Contest judge Sandy Mendler, an architect with Mithun and a leading advocate for sustainable design, gave kudos to the Cohos Evamy green studio workspace in the Hudson Bay Tower in Toronto.
All workstations feature reused furniture, access to daylight, and lighting with fixtures that sense daylight levels and occupancy to turn on and off. Some 80 percent of the studio’s construction waste was diverted away from landfills, and about 60 percent of waste produced by daily operations is recycled. In addition, each meeting room has individual temperature and ventilation controls, and zone-by-zone controls regulate thermal comfort, another factor for high occupant satisfaction scores in the CBE survey.
William P. Robinson Sr. Technology Building
“The transformation of an existing ‘70s building into the first Norfolk State University campus to earn LEED certification is impressive,” says Kevin Powell, a competition judge and the research director at the U.S. General Services Administration. “The lighting/daylighting design elements shown are impressive – and the CBE survey results look good.”
Jurors noted that the Robinson Building can be seen as a positive example of blending sustainability into the renovation of a large number of now-aging and ready-for-renovation 1970s-era buildings. Kevin Powell remarked that the “greenest building is the one you don’t build.”