3. L. GAS FURNACE

  • Certified gas furnaces in the southern half of the U.S., where homes require less heat, are up to 12 percent more efficient than standard models and can save an average of $27 in energy costs per year. Because they use more efficient fans, you can save an additional $11 per year in central AC costs.
    Source: U.S. EPA
  • Certified gas furnaces in the northern half of the U.S. are up to 16 percent more energy efficient than standard models and can save up to $80 in energy costs per year. Because they use more efficient fans, you can save an additional $15 per year in contract AC costs.
    Source: U.S. EPA

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Updated: June 2013