"Think Globally – Act Locally" is a popular bumper sticker with a valid and realistic message. Steve Gerus and Dr. Rosemary Blieszner, a married couple in Blacksburg, Virginia, live by the motto. Co-Owners of Bell Electric, LLC, Steve and Rosemary built a new office for their business and other retail tenants. Consistent with their vision of sustainable development as Smart Growth that is simultaneously pro-business and pro-environment, the new building reflects some of the latest most and creative thinking in green building design. The building incorporates many of the principles studied in this curriculum and be a showcase example of SOL 6.9 - Resources.
In this lesson students will:
Science 6.2, 6.3, 6.5, 6.6 6.9
Green Building Design Green buildings are born through Smart Growth concepts, which are methods of development that conserve and protect natural resources while creating a healthier human habitat. In this Window, we study an actual building recently constructed in Virginia that illustrates modern principles of Green Building design through a combination of several building techniques which may prove cost-effective in the long term:
The market forces that drove the architectural and site-planning decisions for this project were typical for commercial real estate development. The developers understood that if the benefits offered tenants did not exceed the burden of rents, those businesses would locate elsewhere. More interesting are the ways in which the developers used Smart Growth and "green building" principles to add value, at minimum expense, for both tenants and the larger community.
Smart Growth is development that protects natural resources while creating healthier human habitat. It includes consideration of the environmental impact of building at a specific location. This particular building site falls away from the street, and the temptation might have been to fill it up to street grade, as had been done with an adjacent property.
The developers instead chose to preserve some of the natural topography by nesting the footprint of the building close to the original grade. They gained these advantages: a gradually inclined parking lot and driveway, wrapped around the building, allows on-grade access to both building levels; in addition, the wind loading on the structure is lessened and the building now blends into its site rather than dominating it.
Smart Growth encourages a mixture of land uses. Development at this specific site, on the town’s main street, creates a healthier human habitat for employees by its location across the street from a bus stop and by being surrounded by neighborhoods that provide a variety of affordable housing choices. Walking, biking, or using public transportation offers a cheaper, more pleasant and energy-efficient commute, and benefits the community by minimizing added traffic burden.
Smart Growth also encourages a strong, enduring relationship among owners, builders, and tenants. The owners and contractors involved in this project are local. Tenants and neighbors are not burdened by having an absentee landlord. And contractors who are not "here today and gone tomorrow" take greater pride in their work. When jobs and profits are not exported, money is re-circulated in the local economy, and the community gains.
The building itself has many features that illustrate principles of "green building design." First among these is the extensive use of natural lighting and cooling, both around the perimeter and down the east-west midline that runs the length of the building.
The use of Low-E glass maximizes light gain while minimizing cooling load. Lighting fixtures utilize compact fluorescent, electronic ballast fluorescent and LightEmitting Diodes (LED) technology, for lowered cooling load and more lumens per watt. Heating is also energy efficient, utilizing dual-fuel heat pumps. These use natural gas when the temperature gets so low that heat pumps become inefficient. Electricity, with its high production cost to the environment, is preserved for non-heating uses.
Another major feature of the building is the presence of 72 photovoltaic (PV) solar panels, arranged in nine arrays on the roof. These panels use an inverter to transform 14 volts DC into 120 volts AC and feed this non-polluting, renewable energy source directly back into the power grid, generating a net flow of energy to and from the building. Another feature of the roof is a greenhouse, which functions as a passive solar source, maintenance platform for the PV panels, and plant-filled air cleaner.
The conservation of natural resources that marks green building design also emphasizes the use of recycled building materials. This building has a bridge from the parking lot to the upper level, with flooring made of re-milled 300-year-old timbers 24’ 4" long, salvaged from a submerged wharf pier in Savannah Harbor. Surely there are less expensive choices, but if we can teach our children about alternatives to our "throw-away culture," it will be a worthwhile investment. The approach to the upper-floor entrance bridge also features local cut Ordovician limestone, recycled from nearby building projects. than turning found opportunities in site-planning and architecture to the common good.
There is no single feature of this project that makes it Smart Growth, and no single feature of the building that qualifies it as earth-friendly. It is rather the case that many lesser decisions have been guided by an awareness of the long-term impact of human presence on the larger built environment, and on both renewable and non-renewable resources. Some trade-offs have involved significant increases in short-term cost, but others have been no more
Explore the visionary designs of William McDonough (www.mbdc.com and www.mcdonoughpartners.com) and GreenBlue (www.greenblue.org) for creative examples of cradle-to-cradle design and sustainable development initiatives. For some exciting examples of creative advancements in the development of sustainable building materials and design, recognized annually by the governor, read about actual award-winning innovations by manufacturing companies in Virginia by checking out the website of the Virginia Manufacturers Association: (www.vmaoutreach.com).
Also, there are many other organizations devoted to green building design. Following are some websites with exciting information for the classroom:
|Green Building Design||Local Directory|
|Materials||Internet and library access
|Photos from students
"How Green Is Your Home?" score sheet
|Activities||Have a contest to design a hypothetical building that features sustainability concepts and principles related to: ecological sensitivity, human ergonomics, community access, and economic efficiency/effectiveness.||Students are asked to find local examples of building designs that are consistent and inconsistent with sustainable development.|
|Procedure||Hold a Green Building Design contest to allow students to research and design a hypothetical building (residential, commercial, governmental, or retail) that features sustainability concepts and principles related to: ecological sensitivity, human ergonomics, community access, and economic efficiency/effectiveness.||Have students find local examples of building designs that are consistent and inconsistent with sustainable development. Discuss how such local buildings and land use decisions relate or link to national and global aspects of sustainability. Have students use the "How Green Is Your Home?" score sheet to assess the design of their own homes.|
|Assessment||Ask a panel of judges (faculty and students) evaluate the ideas proposed and give feedback to the class.||Students are asked to find local examples of building designs that are consistent and inconsistent with sustainable development.|