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About The nugget. (Sisters, Or.) 1994-current | View Entire Issue (March 22, 2017)
Wednesday, March 22, 2017 The Nugget Newspaper, Sisters, Oregon 19 Desigdidg for optimal edergy use By Jim Cornelius News Editor You don’t have to live off the grid to benefit from designing your living environ- ment for energy efficiency and self-reliance. “It makes sense to engineer your house, to engineer your living environment,” says Jack Addison, who designed his home east of Sisters with those qualities in mind. From choice of construc- tion materials to the manner in which you choose to heat and cool your home to the way you orient it toward the sun, any homeowner can improve their efficiency, reduce their energy footprint — and save money. Addison, a pilot with an engineering background, designed his house himself, employing an architect to take his design from concept to working drawings. He “wore the nail-belt every day” dur- ing the construction, while his family lived in a studio apart- ment above his barn-shop. He is quick to note that the concepts of heating efficiency and alternative sources of heat are scalable. His house is 4,000 square feet, but the concepts are applicable — and per- haps easier to achieve — in a 1,500-square-foot space. And the benefits of a tight, well-engineered and ventilated house accrue to the home- owner no matter whether they go off-grid or hook up to elec- trical power. The first key to efficiency is engineering for heat retention. “There’s lots of pretty houses around,” Addison notes. “Almost none of them are engineered. The heat loss is enormous… Houses should be sealed and then mechanically ventilated.” Addison built with insulat- ing concrete forms — hollow foam blocks which are stacked into the shape of the exterior walls of a building, reinforced with steel rebar, and then filled with concrete. The result is exceptionally strong construc- tion, noise reduction and a very high level of energy efficiency. The house employs radi- ant floor heating in a zone pattern. There are nine heat- ing zones, but Addison notes that in practice he and his wife only use four of the zones. Ventilation is accomplished with a heat-recovery ventila- tor that circulates fresh air, but with a minimal (approximately 3-degree) heat loss. They derive their energy from 20 solar panels placed on the roof of their barn-shop located a few yards away from the house. The panels charge a set of batteries that provide electrical power. The Addisons maintain a diesel generator to power their well, which requires about 100 gallons of fuel per year. Addison noted that he and his wife did not choose solar for ideological reasons. “We weren’t against hook- ing up power,” he said. “It was just too expensive for the return.” He notes that solar power continues to become more accessible and affordable for all kinds of homeowners. “It’ll pay for itself,” he says. “The return is there.” Addison quipped that the number of panels raises an engineering question: Why 20? “Because that’s what would fit,” he said. He and his wife determined that they would simply live with the amount of power 20 panels could generate. Their heating system is backed up with a unique PHOTO BY JIM CORNELIUS Insulated concrete forms help make a house energy efficient. Finnish wood-heating system called a Tulikavi, centrally located in the house. While the Tulikavi is beautiful and highly efficient, the same kind of heating capability could be achieved with a wood stove, Addison notes. In total, the Addisons heat 4,000 square feet off of an 80,000 BTU capabil- ity. Addison estimates that a conventional system would require as much as 300,000 BTU capability. For about eight months of the year, they heat water solely with solar energy. During win- ter, they use propane to pre- heat a tank. There are many options for homeowners to heat or supplement their heat- ing and power with multiple sources. “There’s lots of ways to do this,” he says. Orientation of a house for maximum passive solar impact is another effective technique — but the Addisons weren’t religious about it. “We cheated a bit in favor of the view,” he acknowledged. The benefits of engineering your space, using energy-effi- cient materials and pursuing alternative sources of energy are many: Increased self-reli- ance and security during harsh winters like the one just past, a reduced environmental impact — and a fatter pocketbook. 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