Lennox gas furnaces are incredibly energy-efficient home heating systems. Thanks to advanced engineering, energy-saving technology, highly-durable materials and precision manufacturing, you and your family will be more comfortable than ever during the coldest days of the year.
AFUE Rating: Annualized Fuel Utilization Efficiency, or the percent of heat produced for every dollar of fuel consumed. Like the miles-per-gallon rating on your car, the higher the AFUE rating, the lower your fuel costs.
A furnace with an AFUE of 96 will convert 96% of the gas or oil it consumes into useable warmth. Any gas furnace with an efficiency of 90% or higher is considered to be a high-efficiency heating system.
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