The efficiency of
Furnaces and Boilers is rated by a measure called AFUE- Annual Fuel
Utilization Efficiency ratio.This ratio is similar to measuring the miles per
gallon that a car gets, and indicates the percentage of energy that the unit
actually coverts into heat for your home. The Federal Trade Commission now
requires new furnaces and boilers to display their AFUE rating so that consumers
can effectively compare the heating efficiencies of various models.
An AFUE of 80% means
that 80% of the energy used by the unit is converted into heat for the
home, with the remaining 10% essentially wasted. An AFUE of 90% means
that the unit effectively converts 90% of the energy used into heat. The most
efficient units on the market today are rated up to 95%. The TRANE XV95 Variable Speed Furnace is rated at 95%, but actually performs at almost 97% efficiency when installed and operating properly.
ted at 95%, but has proven to actually
operate at almost 97% efficiency!
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