Heating a home in Santa Fe with natural gas this winter will be more expensive than ever before, according to the nonprofit Local Energy. The cost of heat generated by a typical natural gas furnace, including tax, is expected to be $16.35 per MMBTU, which is about 16 percent higher than last year. Don’t expect that record to last, however. For the past ten years, the cost of heating with natural gas in Santa Fe has been rising at an average rate of nearly 14 percent per year.