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95% or Greater Efficiency Furnaces
These are very high efficiency furnaces. They are the top-of-the line models. They are at least 15% more efficient than the low efficiency furnaces. This means you will save at least 15% more off your gas bill with one of these furnaces than if you select a low efficiency model.
Additionally, some of these furnaces have advanced burners with two or more flame levels. When your home needs less heat, the furnace will operate on low flame; when your home needs more heat it will automatically operate on a higher flame level. The benefit of this is a more quiet operation, as well as increased comfort due to more even temperatures in the home (including a reduction in cool air-pockets near doors and windows).