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A Look at Austin's Net-Zero Neighborhood - Whisper Valley
The poet, writer, and farmer Wendell Berry once defined community as “the mental and spiritual condition of knowing that the place is shared, and that the people who share the place define and limit the possibilities of each other’s lives.” One trap people can fall into is believing that personal change is all that’s needed to confront the myriad problems we collectively face.
Homeowners across the country, for instance, can invest their Christmas bonus in solar panels to help power their home’s electrical needs, or a passive house retrofit to reduce energy costs. Those, of course, are significant decisions to make. In an ideal society, however, communities would come together to manage their natural resources and energy use. Instead of relying on municipal water and electrical grids, which may be unable to scale up to optimum sustainability levels, community-level grids and water projects could be designed and implemented for better and more sustainable resource management.
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Whisper Valley Neighborhood is one such community. A planned housing community in Austin, Texas, Whisper Valley seeks to take sustainability beyond the level of the individual household. The 2,000-acre, master-planned development requires every home built to net-zero capability.
Austin’s first “eco-smart, zero-energy” community offers “an integrated technology package engineered to provide a clean and zero-energy capable solution for entire communities like Whisper Valley,” according to its website. “There are multiple components to this comprehensive system that all work together to reduce consumption, protect the environment, eliminate noise, and save you money.”
The development also works to make homeownership affordable. “We want to make sure this type of technology is available to as many people as possible,” says Kara Weinstein, community manager, about the importance of providing zero-energy capable housing at an affordable price point.
“Inspired by a desire to combat climate change and preserve natural resources,” according to the website, Whisper Valley includes 700 acres of parks, trails, and other natural areas. The community also has a geothermal heated resort-style swimming pool, fitness center, electric vehicle charging stations, and a community education center.
Sustainable Home in a Sustainable Community
Every home built in Whisper Valley adheres to the Austin Energy Green Building Program (AEGB). While numerous national green building certification programs exist, several cities and regions across the country have recently started developing certification programs, which respond to specific and contextual sustainability issues.
Austin’s city-based program offers several pathways to receiving required points for certification, including recycling programs to reduce waste on-site, modeling the home for HVAC efficiency based on its orientation, and energy-efficient appliances, lights, and fans.
One homeowner, Jessie Gardner, took her house above and beyond these requirements. Gardner’s home includes high-efficiency insulation to avoid thermal bridging into living areas. The home has a solar panel array, along with the connection to the geothermal grid system, which allows the home to use renewable and clean energy sources. As a result, Gardner’s home uses up to 65 percent less energy than a “normal” house in the same region.
Several builders are involved in Whisper Valley, including Avi Homes, Buffington Homes, GFO Home, and Pacesetter Homes. Gardner worked with AHA Dream Homes to help her meet the zero-emissions standard that Whisper Valley Neighborhood requires. According to AHA Dream Homes’ website, the company utilizes cutting-edge design technologies and eco-friendly building practices to create innovative sustainable homes.
To achieve a net-zero emission rating, Gardner and AHA relied on ZIP System sheathing and roofing materials to reduce air leakage in the building envelope. They also incorporated spray-foam insulation in the attic, Energy Star double pane windows, and HVAC duct testing.
Many homeowners continue to believe that sustainable homes come at a premium price. The Whisper Valley Neighborhood, however, offers competitively priced homes with net-zero ready capability. The homes have energy-efficient BOSCH kitchen appliances and ultra-efficient geothermal heat pumps; PV solar panels; a Nest thermostat; a video doorbell powered by Google Fiber; and an Electric Vehicle (EV) Charger. The community also boasts miles of bike and hiking trails, as well as those on-site organic gardens that attracted Gardner.
Tobias Roberts
Tobias runs an agroecology farm and a natural building collective in the mountains of El Salvador. He specializes in earthen construction methods and uses permaculture design methods to integrate structures into the sustainability of the landscape.
