Before making the switch to a natural gas furnace, you probably want to make sure you’re receiving the best deal. Therefore, it’s important to be aware of potential money-saving opportunities. The Environmental Protection Agency offers federal tax credits through their Energy Star program. Gas furnaces are typically more efficient than oil furnaces, and (in 2018) if you switch to a gas furnace with an AFUE of 95% or above, the Energy Star program offers a $150 tax credit for the furnace and a $50 tax credit for the advanced main air circulating fan.
Additionally, many natural gas suppliers offer rebates for customers who convert to natural gas -- a quick call can let you know if you your local utility company offers a rebates. Peoples Gas, National Grid, DTE Energy, and Nicor Gas are among the many utility companies that offer rebates for natural gas furnaces or furnaces with an AFUE of 95% or above.