In January 2015, the United States Department of Energy mandated that all new weatherized gas furnaces have a minimum AFUE rating of 81 percent. This regulation applies throughout all 50 states. The following are the minimum AFUE ratings for other types of furnaces.

• Non-weatherized gas furnaces are required to have a minimum AFUE of 80 percent.
• Gas furnaces in mobile homes must have an AFUE of at least 80 percent.
• Non-weatherized oil-fired furnaces are required to have a minimum AFUE of 82 percent.

The U.S. Department of Energy Is currently considering increasing the minimum AFUE rating from 81 percent to 92 percent.

If you are considering replacing your current furnace, we suggest looking at units with an AFUE rating of at least 92 percent. Although the initial cost of these units may be higher, the fuel savings over the life of the unit will more than offset the higher price tag.

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