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AfterFurnace Replacement in Marietta, GA
Furnace replacement in Marietta typically costs between $4,200 and $8,500 depending on the size of your home, the efficiency rating you choose, and whether your ductwork needs modifications. Most replacements take one full day, and Halden Heating and Air Marietta gives you a written price before any work starts so the number you approve is the number you pay. If your furnace is over 15 years old, needs a third major repair in two years, or your heating bills keep climbing while comfort drops, it’s time to talk replacement, not another patch job.
We handle the whole process from load calculation to haul-away of the old unit, and every install is backed by our 365-Day Done Right Promise. You can reach us at (229) 514-0545 any time, day or night. If you’re still deciding between repair and replacement, our Heating & Furnace in Marietta page walks through both paths.
When You Need Furnace Replacement
Some furnaces give you years of warning before they quit. Others fail on the coldest night of the year with no notice at all. Here are the signs we see most often in Marietta homes, especially in older neighborhoods like Historic Kennesaw Avenue and East Cobb’s Indian Hills:
- Your furnace is 15 years or older. Even well-maintained units lose efficiency after a decade and a half. The heat exchanger, the part that separates combustion gases from the air you breathe, becomes the main risk point as a furnace ages.
- Repair bills are stacking up. If you’ve spent $600 or more on furnace repairs in the past two years and the unit is over ten years old, replacement usually costs less over the next five years than keeping a dying system alive.
- Rooms heat unevenly. One bedroom is a sauna, the living room stays cold. That often means your furnace is oversized for the space or your blower motor is struggling, both common in Marietta’s 1970s and 80s split-levels where original ductwork has never been touched.
- Your heating bills rose without explanation. A furnace that’s lost efficiency burns more gas to produce the same warmth. If your Georgia Natural Gas bill jumped 20% or more over last winter with no lifestyle change, the furnace is the usual suspect.
- You hear rumbling, banging, or rattling. A cracked heat exchanger can make a rumbling sound when the burners fire. That’s not a noise to ignore. Carbon monoxide risk is real, and Metro Atlanta’s humid, acidic soil also corrodes furnaces in crawlspaces faster than you’d expect.
- The burner flame is yellow, not blue. A clean furnace burns blue. Yellow or flickering flames mean incomplete combustion, which points to a dirty burner, poor venting, or a failing heat exchanger.
If any of these sound familiar, call us at (229) 514-0545. We’ll give you an honest read on whether repair or replacement makes sense, with numbers to back it up.
Our Furnace Replacement Process
We run furnace replacements on a set process so you know exactly what’s happening from the first call to the final walkthrough. No mysteries, no doorstep surprises. Here’s how it goes:
- Book a replacement consult. You can book online or call (229) 514-0545. A live person answers 24/7, and you’ll get a confirmed appointment time, not a four-hour window. The day of your visit, you can track your technician’s arrival like a rideshare.
- We measure, don’t guess. Your tech performs a load calculation (a formula that sizes the furnace to your home’s actual heating needs, square footage, insulation, and window exposure) rather than just swapping in the same size unit. In Marietta’s mix of ranches, two-stories, and basement builds, that sizing step prevents oversize units that short-cycle and die early.
- You get a written price. Before any equipment is ordered or any tool is picked up, we hand you a line-item price covering the furnace, installation, permit if required, and haul-away of the old unit. That’s The Relay Visibility Guarantee in action. You approve it, or you don’t. The price doesn’t change at the door.
- Install day. A background-checked, uniformed technician arrives at the scheduled time. Most Marietta furnace replacements wrap up in a single day. We cover your floors, protect your home, and test the new system before we leave.
- Final walkthrough and warranty paperwork. You see before-and-after photos of the work, we walk you through the new thermostat if you got one, and you receive your written guarantee. Every install is covered by our 365-Day Done Right Promise. If something’s not right within a year, we come back and make it right at no charge.
Furnace Replacement Pricing in Marietta
What should you budget for a new furnace in Marietta? Here’s a realistic breakdown based on what we see across Cobb County homes:
| Furnace Type | Typical Price Range (Installed) | Best For |
|---|---|---|
| Single-stage, 80% AFUE (basic) | $4,200 – $5,200 | Budget-conscious replacements, smaller homes |
| Two-stage, 96% AFUE (high efficiency) | $5,500 – $7,000 | Mid-size Marietta homes wanting lower gas bills |
| Variable-speed, modulating, 96%+ AFUE | $7,000 – $8,500 | Larger homes, comfort-focused buyers, quieter operation |
| Add-ons (thermostat, zoning, air filtration) | $200 – $1,500 | Depending on system and complexity |
AFUE stands for Annual Fuel Utilization Efficiency. It’s the percentage of fuel that becomes heat for your home instead of exhaust going out the flue. An 80% AFUE furnace sends 20 cents of every gas dollar up the chimney. A 96% AFUE unit wastes only 4 cents. In Marietta’s cold snaps, that difference adds up fast, especially when January nights drop below freezing and your furnace runs for hours.
Three things move your price most:
- Furnace efficiency: higher AFUE costs more up front, saves more monthly.
- Home size and ductwork condition: a 2,800 sq ft East Cobb home needs a bigger unit than a 1,400 sq ft ranch near Marietta Square. If your ducts are leaky or undersized, that work adds to the total.
- Brand: we install Trane, Lennox, Goodman, and Rheem. Trane and Lennox carry premium pricing for their compressors and heat exchangers. Goodman and Rheem deliver solid reliability at a lower entry point. We’ll quote whichever fits your budget, and every unit we install carries a manufacturer warranty on top of our written guarantee.
Every estimate is free. Call (229) 514-0545 and we’ll put a real number in front of you before you commit to anything.
FAQs – Furnace Replacement
How much does furnace replacement cost in Marietta, GA?
You should expect to pay between $4,200 and $8,500 for a full furnace replacement in Marietta, including installation and haul-away of your old unit. The exact number depends on furnace efficiency, home size, and any ductwork work needed. Call (229) 514-0545 for a free, written estimate specific to your home.
Is it cheaper to repair or replace a furnace?
If your furnace is under 12 years old and the repair is under $500, repairing usually wins. If it’s over 15 years old, or the repair costs more than a third of a new unit’s price, replacement is the better money move. We’ll run the numbers with you honestly, and we won’t push a replacement you don’t need.
Can you replace my furnace the same day?
In many cases, yes. We stock common furnace sizes in our local inventory, and a single-day swap is standard for most Marietta homes. Call (229) 514-0545 and we’ll tell you the soonest available install window for your situation.
What brands do you install for furnace replacement?
We install Trane, Lennox, Goodman, and Rheem furnaces, and our techs are certified to service all of them. Each brand has strong points: Trane and Lennox are known for long-lasting heat exchangers, while Goodman and Rheem offer excellent value for the price. We’ll help you pick what makes sense for your home and budget, never what makes us the most margin.
Written by Andre Fuller, Owner at Halden Heating and Air Marietta, serving Marietta.