When energy bills climb or comfort levels slip, many homeowners ask the same question: can I convert my furnace from electric to gas—or gas to electric? The short answer is yes, it’s possible, but the process isn’t always simple. Converting your heating system involves careful planning, compliance with safety codes, and a realistic look at long-term costs.
In this guide, I’ll break down what you need to know if you’re considering a furnace conversion. We’ll cover installation requirements, average costs, and the pros and cons of switching fuel types so you can make the most informed choice for your home.
👉 For the bigger picture, start with our main guide: Gas vs. Electric Furnaces: Which is Better?
Why Homeowners Consider Furnace Conversion
Upgrading your furnace type is usually driven by one or more of these factors:
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Rising utility rates: If electricity rates are climbing faster than natural gas in your area (or vice versa), a conversion might help lower bills.
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Fuel availability: Some regions don’t have reliable natural gas lines, while others have aging electrical grids prone to outages.
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Environmental goals: Gas systems emit more direct carbon emissions, while electric systems can be paired with renewable energy.
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Home upgrades: Renovations, resale plans, or new insulation improvements sometimes prompt a furnace change.
Converting from Electric to Gas: What’s Involved
Switching from electric to gas typically requires more upfront work. Here’s what you can expect.
Gas Line Installation and Utility Access
The first question: does your home already have a gas line? If not, your utility company will need to install one. That may include trenching through your yard and coordinating city permits. According to the U.S. Department of Energy, gas line installation alone can cost anywhere from $500 to $2,000, depending on distance and site conditions.
Venting and Exhaust Requirements
Unlike electric furnaces, gas models produce combustion gases that must be safely vented outside. That means adding a flue pipe or, for high-efficiency models, PVC venting through an exterior wall. Poor venting can cause carbon monoxide buildup, which makes this step critical. ASHRAE sets the ventilation standards most local codes follow.
Upfront Costs and Ongoing Maintenance
A gas furnace installation typically costs $4,500–$7,500 nationally. Annual maintenance—inspections, tune-ups, and safety checks—runs $100–$200 per year. In return, gas units usually deliver lower monthly heating bills, especially in colder climates.
Converting from Gas to Electric: What to Expect
Some homeowners move in the opposite direction—especially in areas where local codes or climate policies discourage new gas hookups.
Electrical Capacity and Panel Upgrades
Electric furnaces require significant power, often on their own 60–120 amp circuit. If your electrical panel can’t handle that load, you’ll need a panel upgrade. The International Code Council notes that most jurisdictions require an inspection before energizing new high-load equipment. Upgrades can add $1,500–$3,000 to project costs.
Space and Installation Differences
Electric furnaces are generally smaller and easier to place, since they don’t need venting. However, your existing ductwork may still need resizing for proper airflow.
Cost Breakdown and Long-Term Savings
Installation costs for electric furnaces usually range from $3,000–$6,000, but monthly utility bills may run higher depending on rates. The EPA points out that while electric systems are simpler and safer, their operating costs can exceed gas unless paired with efficient insulation or renewable energy sources.
Safety and Code Considerations
Switching furnace types isn’t a DIY project—it comes with safety and compliance responsibilities.
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Permits: Both gas and electric conversions require city or county permits.
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Inspections: Authorities will confirm venting, electrical capacity, and equipment are up to code.
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Insurance and warranties: Many manufacturers and insurers require proof of professional installation.
The Energy Star program strongly recommends homeowners work with certified HVAC contractors to ensure performance and safety.
Pros and Cons of Switching Furnace Types
| Factor | Gas Furnace | Electric Furnace |
|---|---|---|
| Upfront Cost | Higher | Lower |
| Operating Cost | Usually lower | Often higher |
| Maintenance | More complex | Simpler |
| Safety | Carbon monoxide risk | No combustion gases |
| Environmental Impact | Direct emissions | Cleaner if paired with renewable energy |
| Resale Value | Attractive in cold climates | Preferred in all-electric or green homes |
Key Takeaways for Homeowners
Converting between gas and electric furnaces is possible—but it’s not always the most cost-effective move. Before making the switch, ask yourself:
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Are energy rates in my area likely to stay stable?
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Can my home’s infrastructure (gas line or electrical panel) support the change?
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Do local codes or climate policies encourage one system over the other?
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Will this improve resale value or long-term savings?
Most importantly, always rely on a licensed HVAC professional for this type of work. Safety, compliance, and performance depend on expert installation.
👉 Next up in this series: Gas vs. Electric Furnace Performance in Older Homes
Final Thoughts from Alex Lane
Switching furnace types isn’t just about swapping one box for another—it’s about balancing safety, comfort, and savings. If you’re weighing a conversion, start with a consultation and a detailed cost analysis. Sometimes, upgrading within the same fuel type (for example, replacing an old 70% AFUE gas furnace with a 95% AFUE model) makes more financial sense than a full conversion.
But if your utility rates, codes, or long-term goals point toward a switch, now you know what to expect.
Alex Lane
Your Home Comfort Advocate
