C. P. Hall, a#39;a#39;Furnace Replacement: The High payOff, a Energy, vol. 7, No. ... An Illinois Department of Energy and Natural Resources survey indicates that natural gas furnaces in the 90+-percent efficiency range cost on average about $2, 100 toanbsp;...
Title | : | Energy Technology Choices |
Author | : | États-Unis. Congress. Office of Technology Assessment |
Publisher | : | DIANE Publishing - 1991 |
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