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Heating and air conditioning systems are the
biggest users of energy in the home, up to 75% of the utility bill.
A new high efficiency furnace can save up to 50% in operating costs
over a ten year old furnace. Many 1990 and earlier model furnaces
have efficiencies of 65% or less. The minimum efficiency furnace
that can be sold in the United States today is 78%. Furnaces are
available that are up to 96.6% efficient. |