Furnace Replacement Cost in Marietta, GA: 2026 Price Guide
Furnace replacement cost Marietta GA typically runs between $2,100 and $10,000+, depending on furnace type, efficiency rating and how much ductwork or electrical work the job needs. Most Marietta homeowners replacing a standard single-stage gas furnace land in the $3,200–$6,000 range, while high-efficiency and two-stage systems push toward the top of that scale.
If you’re researching furnace replacement cost Marietta GA because your current system is past its prime, keeps needing repairs, or a technician has already recommended replacement, this guide breaks down real 2026 pricing by furnace type, what actually drives the number up or down, and how to tell when replacing makes more financial sense than another repair.
Get a free, written furnace replacement quote for your Marietta home before any work begins — no upsell, just an honest number.
Call (678) 235-3388 for a Free QuoteFurnace Replacement Cost Marietta GA — By Furnace Type
| Furnace Type | Typical Marietta Replacement Cost | Notes |
|---|---|---|
| Basic single-stage gas furnace | $2,100 – $3,800 | Entry-level efficiency, most common swap-out for an aging unit |
| Standard two-stage gas furnace | $3,800 – $6,000 | Most Marietta replacements fall in this range — better comfort and lower bills than single-stage |
| High-efficiency / variable-speed furnace | $6,000 – $10,000+ | 90%+ AFUE, quieter operation, best long-term energy savings |
| Electric furnace replacement | $2,500 – $7,000 | Costs vary more with electrical panel capacity and unit size |
| Combined furnace + AC replacement | $7,000 – $15,000 | Common when both systems are original to the home and aging together |
Pricing compiled from Marietta-specific HVAC cost data (HomeAdvisor, Swivl, HomeLynk) and Metro Atlanta furnace replacement figures (Angi), 2026.
Why the range is so wide: a basic like-for-like swap in an easily accessible attic costs far less than a high-efficiency unit that needs new venting, an upgraded electrical circuit, or ductwork modifications. A written, itemized quote after an in-home inspection is the only way to know your real number — phone estimates are always a guess.
What Affects Your Furnace Replacement Cost Marietta GA
- Furnace size and home square footage — an undersized or oversized furnace both waste money, so correct load sizing affects the unit cost
- Efficiency rating (AFUE) — a 95%+ AFUE furnace costs more upfront but can meaningfully lower monthly gas bills over its lifespan
- Ductwork condition — leaky, undersized, or damaged ducts sometimes need repair or sealing alongside the new furnace to get full performance
- Permit and inspection requirements — full replacement always requires a mechanical permit in Marietta (see below)
- Removal and disposal of the old unit — usually included in a written quote, but confirm this upfront
- Fuel type — gas furnace replacement is generally more common and can cost less than converting to or replacing an electric furnace, depending on existing gas line access
Furnace Replacement vs. Repair in Marietta: How to Decide
Most HVAC professionals use a simple rule: if a repair costs more than 50% of a full replacement, replacement is the better long-term value. With furnace repair cost in Marietta typically running $100–$800 for standard issues, that 50% line only really applies to major repairs like a heat exchanger — but a few other signals matter just as much as the dollar figure:
- Your furnace is 15+ years old, even if it’s still technically running
- You’ve needed furnace repair more than once in the same heating season
- Your gas or electric bills have climbed noticeably without a change in usage
- Rooms in your home heat unevenly, or the system short-cycles
- The heat exchanger is cracked, corroded, or flagged during an inspection
Not sure which side of that line you’re on? Our technicians will give you a straight answer after inspecting your current system — see our Marietta furnace replacement service page for what a full replacement visit includes, or our full pricing approach for how every job gets quoted.
7 Signs Your Marietta Home Needs Furnace Replacement
- Your furnace is 15–20+ years old — most gas furnaces are designed to last 15–20 years; beyond that, efficiency drops even without an obvious breakdown
- Rising energy bills with the same usage habits — aging furnaces lose efficiency gradually, often before they fail outright
- Frequent repairs, or a repair quote near replacement cost — see the 50% rule above
- Uneven heating room to room — a sign the system can no longer distribute heat the way it once did
- Increasing dust, or a persistent burning smell after startup — can point to a failing heat exchanger or worn components
- Yellow instead of blue burner flame — a possible carbon monoxide warning sign, not just a wear issue
- Loud banging, rattling, or grinding during operation — often mechanical wear that’s more expensive to keep patching than to replace
Stop using the furnace and call immediately if: you smell gas, see soot or rust around the unit, notice a yellow burner flame, or your carbon monoxide detector activates. The CDC lists carbon monoxide poisoning as a leading cause of accidental poisoning death in the U.S. — see our emergency furnace repair guide for exactly what to do while you wait for a technician.
Do You Need a Permit for Furnace Replacement in Marietta?
Yes. Unlike routine furnace repair, a full furnace replacement in Marietta always requires a mechanical permit. The City of Marietta’s Mechanical Permits office requires permitting and inspection for any new installation or replacement of heating, air conditioning, exhaust, ventilation, and gas supply equipment. Skipping the permit can create problems later — from resale inspection issues to voided manufacturer warranties.
Pure Air Atlanta handles the permit application and scheduled inspection as part of every furnace replacement job in Marietta, so you don’t have to navigate City of Marietta paperwork yourself.
Financing a New Furnace in Marietta
A furnace replacement is a large, mostly one-time cost — many Marietta homeowners spread it out through financing rather than paying the full amount upfront. Ask about current financing options when you request your quote; see our pricing page for what’s currently available.
Furnace Replacement Cost Across Metro Atlanta
Replacement pricing shifts slightly city to city based on local labor rates and permit requirements. See our cost guides and service pages for nearby areas:
Sitewide, see the core furnace replacement service page for Atlanta, or our furnace installation cost guide if you’re weighing new-install pricing instead of a like-for-like swap.
How Pure Air Atlanta’s Furnace Replacement Process Works
- Call or book online — tell us about your current furnace and what’s prompting the replacement.
- In-home inspection and load sizing — a technician assesses your home and current system before recommending a unit size and type.
- Written, itemized quote — you approve the full price, including permit and disposal, before any work starts.
- Permit filed with the City of Marietta — we handle the mechanical permit application on your behalf.
- Installation and inspection — most residential furnace replacements are completed in a single day.
- Follow-up support — ask about scheduling annual maintenance to protect your new system’s lifespan.
Furnace Replacement Cost in Marietta, GA: Frequently Asked Questions
How much does furnace replacement cost in Marietta, GA?
Furnace replacement cost in Marietta, GA typically ranges from $2,100 to $10,000+, depending on furnace type and efficiency. Most standard single- and two-stage gas furnace replacements fall between $3,200 and $6,000.
What’s the difference between furnace installation and furnace replacement?
Furnace replacement means swapping out an existing furnace, usually reusing existing ductwork and gas or electrical connections. Furnace installation typically refers to a brand-new system in a home without existing equipment, such as new construction, which can involve additional ductwork and electrical work.
Do I need a permit to replace a furnace in Marietta?
Yes. The City of Marietta requires a mechanical permit and inspection for any furnace replacement. Pure Air Atlanta files the permit and schedules the inspection as part of every replacement job.
How long does a furnace replacement take?
Most residential furnace replacements in Marietta are completed in a single day, though jobs requiring ductwork modifications or electrical upgrades can take longer.
Is it cheaper to repair or replace an old furnace?
It depends on the repair cost and the furnace’s age. If a repair quote exceeds roughly 50% of full replacement cost, or the furnace is 15+ years old, replacement is usually the better long-term value. See our Marietta furnace repair page to compare against a repair quote first.
For more, see our guides on furnace installation cost, furnace maintenance, or our frequently asked questions page.
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Marietta, GA Service Area — ZIP Code Directory
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