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are built up on posts. The house is insulated with nine inches of spray on polyurethane foam (high density insulating foam) and heated with an oil heater and a wood stove backup. The final cost of construction came in at about $230,000. While this price estimate misses the goal set by CCHRC of $150,000, it is much less than the cost of building standard housing in Anaktuvuk Pass, which can reach $750,000. To deal with the issue of ventilation and energy use, a heat recovery system (HRS) (which allows for air venting while reducing heat loss), was installed after the second year to provide fresh air in the home while reducing energy use. Providing fresh air is critical in any efficient house because moisture buildup can cause mold and mildew and trap gases such as carbon dioxide or carbon monoxide that can cause severe health problems and even, in extreme situations, death. In addition to the high degree of heat efficiency, the house also uses a solar panel array that produces about seven percent of its yearly electricity, mostly during the summer months. This offsets the electricity that the house must pull from the village generator, and further reduces its energy costs. The second project by CCHRC is located in the Yup’ik community of Quinhagak, south of Bethel. Due to its more southerly, coastal location, conditions are much different than in Anaktuvuk Pass. Instead of the relatively dry climate of the Brooks Range, Quinhagak is windy with more humidity, which, has caused rot and mildew in many homes. The mildewed conditions can contribute to serious respiratory diseases in young and elderly. While Quinhagak is accessible by barge, its remote location makes shipping large materials and using heavy machinery very challenging. The final housing design includes the same polyurethane envelope insulation as in Anaktuvuk, with an octagonal shaped building that is based on traditional Yup’ik designs which helps to shed snow in the winter. Fifty-five homes in Quinhagak were found to have mold and mildew severe enough to be declared “disaster” sites and were recommended for reconstruction. In the shorter term, the houses were renovated to make them livable while homeowners wait for new housing, if they choose to build a new home. The prototype house in Anaktuvuk Pass built by CCHRC cut heating fuel consumption by 75 to 80 percent. Photo by the Author Sustainable Energy Opportunities: Best Practices for Alaska Tribes Page 7PDF Image | Sustainable Energy Opportunities: Best Practices for Alaska Tribes
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