The Average Furnace Replacement Cost In 2014, gas boiler replacement costs range from $2,500 to $5,000 for a mid-efficiency boiler and $6,000 to $9,000 for a high-efficiency boiler. The installation can take several days and can require additional modifications and repairs if the existing boiler is old.
Read MoreOil Boiler Cost To Replace: What are the Average Costs and . Jun 16, 2021 · The average oil furnace costs between $500 and $2,500 for the unit alone. Prices of a new oil furnace will change with size, brand, and energy efficiency. Oil burning furnaces at that price point can heat a house that is around 2400 square feet or less.
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