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Natural gas is one of the most economical sources of energy for home heating. That’s why, according to the Natural Gas Supply Association’s naturalgas.org, 62 million homes (56 percent of the U.S.

Dear Jim My furnace is old, but it still seems to heat well. My budget is tight, so I need to keep my utility bills low and the furnace working for a long time. Are there any simple tune-up checks I ...