Furnace Replacement Cost: 2026 Homeowner Guide
Updated July 4, 2026 · 7 min read
A new furnace is one of the bigger home purchases you will make on short notice — often when the old one has already quit in the cold. The honest answer to what it costs is it depends on fuel type, efficiency, your home's size, and how hard the install is. This guide lays out typical national ranges so you can sanity-check any quote, and shows you exactly which factors move the price before you talk to a single contractor.
What a furnace replacement typically costs
Most furnace replacements bundle the equipment, labor, permits, and disposal of the old unit into one project price. Gas furnaces are the most common in the U.S., but electric and oil units follow different cost curves. The ranges below are ballpark figures to orient you — the only number that matters for your budget is a written local quote.
| Furnace type | Typical installed range | Notes |
|---|---|---|
| Gas (standard 80% AFUE) | $3,000 - $6,000 | Most common; good value where gas is cheap |
| Gas (high-efficiency 90-98% AFUE) | $4,500 - $10,000 | Lower fuel bills; may need new venting and a condensate drain |
| Electric | $2,500 - $6,000 | Lower install cost, but higher running cost in cold climates |
| Oil | $5,500 - $10,000+ | Fewer models; often paired with tank and line work |
What actually drives the price
When two quotes look far apart, the difference is almost always in one of these factors — not the contractor padding the bill. Understanding them helps you compare apples to apples.
- Efficiency rating (AFUE). A 96% high-efficiency furnace burns less fuel but costs more up front and often needs new PVC venting and a condensate drain. An 80% unit is cheaper to install but costs more to run.
- Furnace size (BTU output). Sized to your home's square footage, insulation, and climate — not guessed. An oversized unit short-cycles and wears out early; an undersized one never keeps up. A proper load calculation matters more than the brand.
- Fuel type and gas line work. Switching fuels (say, electric to gas) means running a new gas line and venting, which adds significant labor.
- Ductwork condition. Leaky, undersized, or damaged ducts may need sealing or modification. Some homes need none; others need substantial work.
- Install complexity. A tight attic, crawlspace, or a switch from a horizontal to an upflow configuration all add labor hours.
- Permits and code upgrades. Most jurisdictions require a permit and inspection; older homes sometimes need electrical or venting brought up to current code.
High-efficiency vs. standard: is the upgrade worth it?
The bigger the temperature gap you heat against, the faster a high-efficiency furnace pays back. In a cold northern climate with expensive gas, the fuel savings can recover the price difference over the life of the unit. In a mild climate where the furnace runs only a few weeks a year, a standard-efficiency unit often makes more financial sense. Ask any contractor to show you the annual operating-cost estimate for each option, not just the sticker price.
How to get an accurate quote (and avoid overpaying)
- 1Get at least three written, itemized estimates that separate equipment, labor, permits, and disposal.
- 2Insist on a load calculation (Manual J or equivalent) — a serious installer sizes the furnace to your home, not to whatever they have in the truck.
- 3Confirm the quote includes a permit and inspection; skipping the permit is a red flag, not a saving.
- 4Ask what is NOT included — thermostat, new venting, duct modifications, or electrical work can be quoted separately and surprise you later.
- 5Verify the installer's license and insurance before work starts, and get the warranty terms (equipment and labor) in writing.
That last step is where a lot of homeowners get burned — a cheap quote from an unlicensed or uninsured installer can cost far more if the work fails inspection or the equipment warranty is voided by an improper install. This is exactly the checking we handle for you: see our vetting standard for how we verify license, insurance, and complaint history before anyone comes to your home.
If you have ever wondered whether the lead-marketplace sites really protect you, it is worth understanding how that model works — is Angi legit breaks it down honestly.
Skip the guesswork and the sales pressure — tell us about your furnace and we will line up vetted, licensed installers so you get real quotes and deal with one number: ours.
Frequently asked questions
- How long does a furnace replacement take?
- A straightforward like-for-like swap is often done in a single day. Jobs that involve new venting, a fuel-type switch, ductwork changes, or difficult access can run two days or more. Your installer should give you a realistic timeline in the written estimate.
- Should I replace my furnace and AC at the same time?
- If both are near the end of their life, replacing them together can save on labor and ensure the system is matched for efficiency. If your AC is relatively new and working well, there is usually no need to replace it just because the furnace failed. Ask for the cost both ways so you can decide.
- Is it cheaper to repair or replace an old furnace?
- As a rough rule, if a furnace is near or past its expected lifespan and the repair costs a large share of a new unit, replacement is usually the better long-term value — especially since older units run less efficiently. A one-off repair on a newer furnace almost always makes more sense. A licensed technician can tell you where yours falls.
On these figures
- Typical U.S. ranges compiled from widely-published home-service cost guides; treat as ballpark, not a quote.
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