Lennox Furnace Repair Roswell GALennox furnaces are known for their durability and low cost. But are you aware they manufacturer some of the most technologically advanced units as well? Call the Roswell Furnace Repair team from R.S. Andrews for answers to all your questions.

ENERGY STAR® qualified which means it meets or exceeds EPA guidelines for energy efficiency.

Save Money by Upgrading the Furnace

Most homeowners want to know where they can capture the greatest savings when upgrading their heating nad cooling equipment. They think the saving will come from the air conditioner, and upgrading will save them substantial money. But the biggest savings will come from getting a new furnace with AFUE of 80 or greater.

AFUE Furnace Rating

AFUE is a measure of a furnace’s energy efficiency. It is the ratio of heat output of a natural gas furnace compared to the total energy consumed. An AFUE of 90% means that 90% of the energy in the fuel becomes heat for the home. 10% of the heat generated escapes up the chimney and elsewhere. That does not account for the heat losses of the duct system or piping, which can be as much as 35% of the energy for output of the furnace when ducts are located in the attic.

The minimum allowed AFUE rating for a non-condensing fossil-fueled, warm-air furnace is 78%; the minimum rating for a fossil-fueled boiler is 80%; and the minimum rating for a gas-fueled steam boiler is 75%. A condensing furnace or boiler condenses the water vapor produced in the combustion process and uses the heat from this condensation. The AFUE rating for a condensing unit can be much higher (by more than 10 percentage points) than a non-condensing furnace.