Over the past 40 years, the efficiency of furnaces has more than doubled, and the cost of fuel has more than tripled. Switching your old furnace out for a new one can quite literally save you thousands of dollars per year. The only sure-fire way to know if your furnace is operating efficiently is to call for a visit from one of the furnace repair experts at Ram Mechanical. There are a lot of things that go into an efficient central heating system beyond your furnace.