Switching from a boiler to a furnace is a significant home upgrade, offering opportunities for greater heating efficiency and fuel flexibility. Homeowners often ask, “How much does it cost to replace a boiler with a furnace?” This detailed guide covers costs, factors influencing prices, installation requirements, and essential tips for making an informed decision.
Boiler Vs. Furnace: Key Differences
Understanding the difference between boilers and furnaces clarifies what’s involved in the replacement process. Boilers distribute heat via hot water or steam through radiators, while furnaces heat air and distribute it through ducts and vents. This fundamental distinction affects costs, infrastructure needs, and comfort levels in your home.
Primary Differences Table
| Feature | Boiler | Furnace |
|---|---|---|
| Heat Distribution | Water/Steam | Forced Air |
| Fuel Types | Natural Gas, Oil, Propane, Electric | Natural Gas, Oil, Propane, Electric |
| Air Quality Effects | Neutral (No Air Movement) | Can Circulate Dust & Allergens |
| Infrastructure Needed | Pipes & Radiators | Ductwork & Vents |
| Cost to Install | Higher (Usually) | Lower |
Average Cost To Replace A Boiler With A Furnace
On average, replacing a boiler with a furnace costs between $6,000 and $14,000. This estimate includes the purchase of a new furnace, labor, removal of the old boiler, installation of ductwork, and all necessary connections. Actual costs can vary based on home size, furnace efficiency, and local labor rates.
Summary Of Expected Costs
- New Furnace: $2,000 to $6,000 for unit and basic install
- Boiler Removal: $500 to $2,500
- Ductwork Installation: $2,000 to $8,000
- Electrical/Plumbing Modifications: $500 to $2,000
- Permits/Inspections: $250 to $1,000
Factors That Affect The Cost
Several factors impact the total cost to swap a boiler for a furnace. These include:
- Home Size: Larger homes require bigger systems and more ductwork, increasing costs.
- Existing Infrastructure: Homes lacking ducts need new systems installed throughout, raising expenses.
- System Efficiency: High-efficiency furnaces cost more upfront but offer long-term savings.
- Fuel Source: Switching fuel sources (oil to gas, for example) adds both equipment and conversion costs.
- Labor Rates: Urban areas or regions with higher labor costs will see pricier installations.
- Accessibility: Hard-to-access basements or crawlspaces increase installation complexity.
Cost Breakdown: Major Expense Categories
1. Furnace Purchase And Installation
The furnace unit itself can range from $1,500 to $5,000 depending on brand, capacity, and efficiency rating. Installation typically adds $500 to $1,500 to this cost, covering hookups and testing.
2. Boiler Removal And Disposal
Removing an old boiler involves labor, disconnection, and safe disposal. Costs range from $500 to $2,500 depending on system size and any hazardous materials involved (like asbestos insulation).
3. Ductwork Installation
Ductwork is one of the most expensive aspects of changing from a boiler (which uses pipes) to a furnace (which uses ducts). Expenses run from $2,000 to $8,000 or more, based on home layout and number of vents required.
4. Electrical And Plumbing Modifications
Some homes require wiring upgrades, thermostat changes, or rerouting pipes. Expect to budget $500 to $2,000 for this part of the project. Adding humidifiers or air cleaners can also raise costs.
5. Permits And Inspections
Most municipalities require permits for major HVAC work. Permit fees echo local regulations and inspection requirements, costing $250 to $1,000 typically.
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Labor Considerations And Contractor Selection
Labor constitutes a significant portion of the total expense. Always select a licensed professional with experience in both boiler and furnace systems. Obtain multiple quotes, ask about previous retrofit jobs, and ensure detailed written contracts to avoid hidden charges or incomplete work.
Additional Expenses To Consider
Occasionally, homeowners encounter unexpected expenses during the replacement process:
- Old Pipe Removal: Abandoned or obsolete pipes may require capping or removal.
- Asbestos Remediation: Older boiler systems may have asbestos, necessitating professional abatement.
- Home Repairs: Floor, wall, or ceiling repairs where ductwork is newly installed.
- Supplemental Insulation: Improving insulation ensures maximum furnace efficiency post-installation.
Choosing The Right Furnace For Your Home
Fuel Types
Furnaces are available in natural gas, oil, propane, and electric models. Natural gas is the most common and typically the cost-effective option in the U.S. Propane and oil are suitable for homes without gas access, while electric furnaces excel in areas with low electricity rates or milder climates.
Size And Capacity
Proper sizing is essential. An HVAC contractor will perform a Manual J calculation to determine correct furnace size. Oversized or undersized units can result in poor heating and higher bills.
Efficiency Ratings
Modern furnaces offer Annual Fuel Utilization Efficiency (AFUE) ratings from 80% to 98%. Higher efficiency models (above 90%) are more expensive but offer greater savings over time, especially in colder climates.
Brand And Features
Popular brands include Lennox, Carrier, Goodman, and Trane. Features like variable speed blowers, smart thermostats, and zoning systems enhance comfort and efficiency, with associated additional costs.
Expected Energy Savings After Switching To A Furnace
For many homeowners, installing a new furnace can reduce heating bills—especially when replacing older, inefficient boilers. New high-efficiency furnaces use less fuel and may qualify for utility rebates or federal tax credits. However, air-based heating can lead to higher cooling costs if paired with central air conditioning systems.
Rebates, Tax Credits, And Financing Options
Many state and federal programs offer incentives for high-efficiency furnace installations. Check databases like Energy Star, DSIRE, or your local utility for available rebates, tax credits, and low-interest financing.
How To Prepare Your Home For The Switch
In advance of installation, clear access to heating system areas, relocate valuables, and discuss potential disruptions with your contractor. Consider upgrading insulation, sealing duct leaks, and installing smart thermostats for optimal results post-installation.
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Pros And Cons Of Replacing Boiler With Furnace
| Pros | Cons |
|---|---|
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Timeline For The Replacement Process
Most projects take between three days and two weeks, depending on complexity. Boiler removal and furnace installation can each be completed in a day, but ductwork and finish work may require additional time—especially in larger or multi-story homes.
Frequently Asked Questions
Is It Worth Replacing Boiler With Furnace?
If your existing boiler is aging, inefficient, or you desire central AC, the upgrade to a furnace may be justified. Calculate payback by comparing annual energy savings against the project cost.
Can I Convert My Home Heating From Radiators To Forced Air?
Yes, but this requires ductwork installation through walls, floors, and ceilings. This is the costliest part of the retrofit and can be disruptive.
Will My Home’s Resale Value Improve?
Modern, efficient heating systems are attractive to buyers. Home appraisals may reflect the improved system and ducted AC potential, especially in hot real estate markets.
How Long Will My New Furnace Last?
With proper maintenance, expect a lifespan of 15 to 25 years on most modern furnaces.
Who Should I Hire For The Job?
Choose licensed HVAC contractors with extensive experience in heating conversions. Ask for references, confirmation of insurance, and detailed written quotes.
Key Takeaways For Homeowners
- Total replacement cost typically ranges from $6,000 to $14,000.
- Main expenses: furnace unit, ductwork, labor, and permits.
- High-efficiency furnaces can reduce energy bills, especially when upgrading from legacy heating systems.
- Additional costs may arise from removing pipes, dealing with asbestos, or updating home infrastructure.
- Assess eligibility for rebates, tax credits, and low-interest loans to offset upfront investment.