GreenClips.163 03.14.01 DENVER-AREA DEVELOPMENT MAKES ROOM FOR GREEN The Meadows Sanctuary, a new 40-acre residential development outside of Denver, Colorado, was designed to provide a haven for all its inhabitants--human and otherwise--with its expansive greenbelt, ponds and streams, cul-de-sac "pocket parks" and bird nesting grounds. The centerpiece is an 11-acre park that the developer, Skyland Meadows Developments, donated to the local park district. The Meadows Sanctuary plans to participate in Denver's New Home Water Conservation Incentive Program, which provides payment incentives to developers who reduce the number of acre-feet of water consumed. Water conservation measures at The Meadows Sanctuary will include xeriscaping in public areas, reducing the irrigated greenbelt to eight acres, and restricting the amount of turf to 50 percent of a home's lot. All of the development's 86 homes are being constructed to the Built Green Colorado standards for energy efficiency, land use, water efficiency, indoor air quality and resource-efficient materials. Larry Larsen of Larsen Homes, one of the development's two builders, remains somewhat skeptical about the benefits versus the costs of green building, saying most of his customers haven't asked about it. But DeWayne Campbell of Campbell Homes, the development's other builder, has no hesitation about going green. "It turns out that when we looked at the requirements for the Built Green program, we found that we were doing almost all of that anyway," says Campbell. - Professional Builder, 28 Feb 01, p 116, by Meghan Stromberg. ENERGY SAVINGS WITH CO2-BASED VENTILATION CONTROL Carbon dioxide (CO2)-based demand control ventilation (DCV) is a real-time, occupancy-based ventilation approach that can offer significant energy savings over traditional fixed ventilation approaches, particularly where occupancy is intermittent or variable from design conditions. Properly installed, CO2 DCV can reduce unnecessary over ventilation that might result if air intakes are set to provide ventilation for a maximum assumed occupancy. CO2 DCV is based on the principle that the differential between inside and outside CO2 concentrations can indicate a space's ventilation requirements. As a rule of thumb, a differential of 700 ppm indicates a ventilation rate of 15 cfm/person; a differential of 500 ppm indicates a 20 cfm/person ventilation rate. Most CO2-based sensor technology use some form of infrared-based detection. Three years ago, CO2 sensors cost about $400 to $500 per sensor, but today a typical contractor price has dropped approximately 50 percent. CO2-based DCV can yield operational energy savings of $0.05 to more than $1 per square foot annually. Payback will be greatest in higher density spaces that are subject to variable or intermittent occupancy that would have normally used a fixed ventilation strategy, such as theaters, schools, retail establishments, and meeting areas. In spaces with more static occupancies, such as offices, CO2 DCV can provide control and verification that adequate ventilation is provided to all spaces. - ASHRAE Journal, Feb 01, p 18, by Mike Schell and Dan Int-Hout. FIVE ARCHITECTS WIN CHICAGO'S GREEN HOMES COMPETITION The five winners of the Green Homes for Chicago competition have each received $20,000 for home designs that are energy efficient, affordable, and easily produced by a conventional builder. Four of the winners practice in Chicago: EHDD Architecture, Ross Architecture, Wheeler Kearns Architects, and William Worn Architects. The fifth winner was Sean Garrett Architecture in Denver. The houses will be build on city-owned land with funding from ComEd, a local utilities provider. Green features proposed by the winning architects include solar-powered heating and cooling, and a stairwell that uses water bottles for insulation. Construction of the five homes will be complete by fall. The maximum construction budget for each home is $175,000, excluding the value of the lot. This includes a $115,000 construction budget, with up to $10,000 in green upgrades. When completed, the buildings will be open to help educate the public about environmentally responsible design. Eventually, Chicago's Department of Housing will sell the homes and incorporate their successful features into specifications for future affordable-housing projects. - Architectural Record, Mar 01, p 36, by Deborah Snoonian. CERTIFIED RECYCLED DRYWALL FROM TEMPLE-INLAND Temple-Inland's wallboard products from its plants in West Memphis, Arkansas, and Cumberland City, Tennessee, have been certified by Scientific Certification Systems to have at least 95 percent recycled content. The Arkansas and Tennessee plants obtain 100 percent of their gypsum supply from flue-gas desulfurization processes at Tennessee Valley Authority coal-fired electric power plants. Certified recycled content wallboard from these plants represents about 60 percent of the company's nearly 2 billion square feet of annual wallboard production. Temple-Inland distributes its products to most of the Southeast, Southwest and Midwest. More: http://www.temple.com/greengyp. - Environmental Building News, Feb 01, p 10, by Peter Yost. MET HOME APPLAUDS DESIGN THAT MAKES A DIFFERENCE Metropolitan Home's 20th-anniversary edition features the magazine's "Design 100" list of noteworthy people, places and things in the world of home design. This year the list includes visionaries and organizations that are toiling in the fields of green building, low-cost housing and other areas of common good. Green design activists on the list include: landscape architect Julie Bargmann of the Dirt Studio in Charlottesville, Virginia, whose passion is to regenerate landscapes that have suffered from industrial ills; architect Darrel DeBoer, who champions bamboo's virtues as a building material; forester Robert Simeone of Sylvania Certified, a wood products firm whose garden furniture and decking carries the Forest Stewardship Council brand; and architect Gail Lindsey, who helps government and private clients make their buildings more eco-friendly. Also featured on the list is Vermont-based Environmental Building News, for their efforts to connect all the green dots that add up to creating eco-friendly buildings. - Metropolitan Home, Mar-Apr 01, p 86. . . . . . . . . . . . . . . . . . . . . . . . . . . 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