Thorsteinsson, Hildigunnur H.; Tester, Jefferson W. - In: Energy Policy 38 (2010) 2, pp. 803-813
According to the US Energy Information Administration, space and hot water heating represented about 20% of total US energy demand in 2006. Given that most of this demand is met by burning natural gas, propane, and fuel oil, an enormous opportunity exists for directly utilizing indigenous...