ATLANTA AIR CONDITIONING & HEATING CONTRACTORS

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Efficiency ratings

Gas furnaces. Gas furnace efficiency, or AFUE, indicates the percent of fuel burned that is converted into heat for the home.  A higher AFUE rating indicates higher efficiency and lower gas bills.  Modern gas furnaces are usually rated between 80% and 97% AFUE.  In comparison, AFUE ratings for many old furnaces fall between 50% and 60%.  Replacing an old 50% AFUE furnace with a new 80% AFUE furnace reduces fuel consumption by more than a third.

Heat pumps and air conditioners. The SEER rating is the primary efficiency rating of both heat pumps and air conditioners.  A higher SEER rating indicates higher efficiency and lower power bills.  The U.S. Department of Energy is enforcing a minimum SEER rating of 13 on any new residential systems manufactured as of January 2006.  As a comparison, a 15-year-old air conditioning unit would likely have a SEER rating around six.  Replacing a 15-year-old unit with a modern 13-SEER-rating unit would cut cooling costs by more than half. 

Many homeowners find that new, highly efficient systems pay for themselves in a short period of time through lower power and gas bills and lower maintenance costs.

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