In Rural Minnesota, a 70-Acre Lab for Sustainable Living
Paul Hunt still remembers the dilemma that he and his wife, Lynn, faced in early January 2010 at their home in rural north-central Minnesota. The couple had just moved into their ultra-efficient house, on the outskirts of Pine River, population 944, but still lacked a thermostat and were about to go out of town for more than two days. It was bitterly cold, and an exterior sensor, one of the many dotting their house, suggested that the nighttime temperature would dip far below zero. Should they leave the heat on or turn it………