How Much Does an Oil Furnace Cost? [2026 Data]

In 2026, the national average cost to replace an oil furnace is $5,000. Most homeowners spend between $2,500 and $10,000, with your home's size, AFUE efficiency rating, and additional project costs like ductwork repairs and permit fees driving the final price.

Oil Furnace Cost Factors: What Determines the Price?

The main factors that impact how much oil furnace replacement costs are your home's size, the unit's efficiency, the brand you choose, and labor costs in your area.

Home Size

Your home's size is one of the biggest factors in determining how much your new furnace costs, since larger homes require more powerful units to heat all living spaces. The complexity of your heating system's design and layout can also affect installation costs:

Energy Efficiency

The AFUE rating of an oil furnace measures how efficiently it converts fuel to heat, and this rating is a key cost driver. Standard efficiency models with AFUE ratings between 80% and 87% cost $1,200 to $4,000 up front but deliver less long-term savings on energy bills. Energy-efficient furnaces with AFUE ratings of 90% to 97% run $3,000 to $10,000, and their long-term energy savings often justify the higher initial price.

Brand

The brand you choose plays a significant role in your oil furnace's overall cost. Well-established brands with strong reputations for quality and reliability typically carry a higher price tag. That added investment often comes with better warranties and fewer repair calls over the life of the unit.

Labor

Labor is a meaningful line item in any oil furnace replacement budget, with installation costs ranging between $1,000 and $3,000 depending on your location and the complexity of the job. Skilled HVAC professionals ensure the furnace is installed correctly, which directly affects its long-term performance and lifespan.

Oil Furnace Additional Costs: What to Budget For

In addition to the base price of the unit and standard labor, several extra expenses may arise depending on your home's specific needs and setup.

Ductwork Repair or Replacement

Air duct replacement costs $25 to $55 per linear foot, with most projects averaging $1,500 to $5,500 overall. Assessing your ductwork during an oil furnace replacement is essential, since damaged or poorly insulated ducts reduce heating efficiency and indoor air quality. Addressing duct issues at the same time as your furnace replacement can lead to meaningful long-term savings on energy bills.

Asbestos

If your furnace area is affected by asbestos, inspection and testing adds $250 to $700 to your budget. Abatement, if required, costs an additional $700 to $2,200 and is a necessary step to protect your household's safety.

Homes built before the 1980s are the most likely to contain asbestos materials that become hazardous when disturbed during furnace replacement. 

Removal of Old Furnace

Removing and disposing of your old oil furnace is a separate cost that can run $100 to $400, depending on local regulations and what your contractor includes in their contract. Ask your installer up front whether removal is bundled into their quote or billed separately.

Oil Tank Replacement

Underground tanks require excavation, pushing costs to $1,600 to $6,200. Aboveground tank replacement is less involved at $1,000 to $4,300, though both types should be inspected for corrosion or damage before connecting them to your new furnace.

Here is a breakdown of oil tank replacement costs by type:

Other System Updates

Other updates might be needed to ensure seamless integration with the new furnace to enhance the overall efficiency and safety of your heating system:

• Electrical repairs: $100 to $250

• Condensation drain: $200 to $600

• Chimney liner: $900 to $3,800

• Air duct cleaning: $25 to $45 per vent

Inspection & Permits

Most local jurisdictions require permits for oil furnace replacements, and the associated fees should be factored into your budget from the start. Permit costs for oil furnace installation vary by type, as shown below:

Boiler Repair Pro Costs: What to Expect

Hiring furnace installation pros for oil furnace replacement costs $2,500 to $10,000, with your home's size and the furnace type being the primary variables. Your local furnace installation company can ensure the work is done safely and that your heating system is properly set up before winter arrives.

Here's why it's ideal to hire a boiler repair pro

Oil furnace replacement involves fuel systems, ventilation, and high-heat equipment—hiring a professional installer is the safest and most reliable way to get it done right. Expert installation ensures your system is properly sized, safely connected, and built to last. Some of the key benefits of working with a pro include:

• Pros make sure your new furnace is properly sized and equipped to fit the needs of your home.

• They can spot underlying ductwork issues or ventilation concerns that can be fixed throughout installation.

• A professional will also be equipped to remove and dispose of your old furnace, which helps prevent leaks and spills.

• A licensed and insured boiler repair pro will usually utilize a warranty for their work, so any future issues are covered.

If you want to DIY boiler repair

Furnace replacement should always be handled by a licensed professional to ensure the work is done safely and up to code. If you want to help the job go smoothly, there are a few simple ways to prep the space before your installer arrives:

• Clear out any existing items that may be too close to your furnace or get in the way of the removal of the old furnace and installation of the new one.

• Turn off the furnace and clean up the space by dusting, sweeping, and removing clutter.

• Make sure there's a clear path from entry to exit.

• Keep any pets or kids away from the workspace.

Oil Furnace Add-Ons: What Extra Upgrades Cost

Replacing an oil furnace is a smart opportunity to evaluate your home's overall energy efficiency and add upgrades that reduce the workload on your new system. Common add-ons range from energy-efficient windows ($325 to $2,000 per window) to smart thermostats and improved insulation, each offering long-term savings that can offset their up-front cost.

Here’s what you’ll pay for common oil furnace installation add-ons that can help you maximize its efficiency:

Adding Energy-Efficient Windows

Upgrading to well-insulated windows directly complements your new oil furnace by reducing heat loss throughout your home. Energy-efficient windows cost $325 to $2,000 per window, and the reduction in your heating system's workload can translate to lower energy bills over time.

Upgrading Smart Thermostat

A smart thermostat costs $225 to $400 and gives you precise control over your home's temperature, which optimizes energy usage and enhances your furnace's overall efficiency.

Updating Home Insulation

Better insulation helps maintain a consistent indoor temperature, which reduces the strain on your oil furnace and lowers heating costs. Adding or updating insulation costs $900 to $3,000 and can deliver substantial long-term energy savings.

How to Save Money When Replacing an Oil Furnace

To minimize the cost of replacing an oil furnace, consider the following strategies:

• Obtain multiple quotes : Contact several HVAC professionals to ensure competitive pricing.

• Explore energy rebates : Research available energy rebates or incentives that can offset costs.

• Bundle services : If other HVAC updates are needed, bundling services can be more cost-effective.

• Ask about furnace removal discounts : Contractors sometimes offer discounts on oil furnace removals when the old unit contains valuable scrap metals.

• Keep up on maintenance : Regular preventative maintenance of your new furnace can save energy and prevent costly repairs in the future.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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