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Before
AfterFurnace Replacement in Marietta, GA
Furnace replacement in Marietta typically costs between $3,800 and $7,500 for a mid-efficiency unit in a standard single-family home, with high-efficiency models running $6,000 to $11,000 installed. Most replacements take one full day, though larger homes or ductwork modifications can stretch to two. At Brandt HVAC Co Marietta, every replacement starts with a written quote so you know the full cost before any work begins. Call (478) 662-5175 and we’ll walk you through your options. If you’re weighing repair against replacement, our Heating & Furnace in Marietta page covers the full range of what we do.
When You Need Furnace Replacement
Not every furnace problem means replacement. But there are signs that tell us the equipment is done. Here’s what we tell Marietta homeowners to watch for:
- Your furnace is 15 to 20 years old. Most furnaces in Cobb County homes last 15 to 20 years. After that, heat exchangers crack, blower motors fail, and repair costs pile up fast.
- Repair bills topped $700 in the last two seasons. A good rule of thumb: if a repair costs more than a third of a new unit’s price, replacement makes better financial sense. We’ll give you the numbers either way.
- The heat exchanger is cracked. This is the one we treat as urgent. A cracked heat exchanger can leak carbon monoxide into your home. We’ll shut the furnace down and advise replacement, not repair.
- Rooms heat unevenly and the furnace runs constantly. When a furnace can’t hold temperature in East Cobb ranch homes or Marietta Square bungalows, the system has lost capacity. Adding insulation won’t fix a worn-out blower and burner.
- Your energy bills climbed steadily over three winters. A furnace losing efficiency burns more gas to produce the same heat. Older 80% AFUE units are dramatically costlier to run than today’s 95%+ models.
- The burner flame is yellow, not blue. A yellow flame means incomplete combustion and possible carbon monoxide production. We flag this immediately during any inspection.
Our Furnace Replacement Process
We don’t do mystery installs. Here’s exactly how a Brandt HVAC Co Marietta replacement works, step by step:
- You call (478) 662-5175 and talk to a live person. No phone tree, no voicemail. We schedule a time that works for you, including evenings and weekends.
- You get your technician’s name and photo before we arrive. Every Brandt technician is background-checked and identity-verified under the Threshold Verified standard. You’ll know who’s coming to your door before they knock. They’ll show a photo ID badge when you answer.
- We inspect your furnace, ductwork, and fuel line, then hand you a written price. The quote includes the equipment, labor, permits if required by Cobb County, haul-away of the old unit, and any venting or gas-line work. You approve the number before any work starts.
- We install the new furnace in one day. We cover floors, remove the old unit, set the new one, connect gas and electrical, test the full cycle, and walk you through the thermostat and filter access. We leave the space as clean as we found it.
- You get a written guarantee on the entire job. If anything isn’t right within 365 days, we return and make it right at no charge. That’s the 365-Day Done Right Promise.
We service and install Trane, Lennox, and Goodman furnaces in Marietta homes regularly. If you have a brand preference, we’ll quote it straight. If you want our recommendation based on your home’s size and ductwork, we’ll give you that too.
Furnace Replacement Pricing in Marietta
Here’s what furnace replacement realistically costs in Marietta as of this season. These are installed prices including labor, basic permits, and haul-away:
| Furnace Type | Typical Installed Range in Marietta | Best For |
|---|---|---|
| 80% AFUE single-stage | $3,800 – $5,200 | Budget-conscious, smaller homes, rental properties |
| 92-95% AFUE two-stage | $5,000 – $7,500 | Most 1,800-2,800 sq ft Marietta homes |
| 96%+ AFUE modulating | $6,500 – $11,000 | Larger homes, comfort-focused homeowners, long-term savings |
| Heat pump + furnace (dual fuel) | $8,000 – $14,000 | Homes wanting efficient cooling plus gas heat backup |
What moves the price? A few things: the furnace’s efficiency rating (higher AFUE costs more upfront, saves more monthly), whether your existing ductwork needs sealing or modification, and whether the flue or gas line needs upgrading to code. Older Marietta homes near the Square, especially those built before 1980, sometimes have undersized gas lines or asbestos-wrapped ductwork that adds labor.
We quote every job in writing before starting. No surprises on the invoice. Call (478) 662-5175 for a free estimate. We’ll give you real numbers, not vague ranges.
Brands We Recommend and Install
We’re not tied to one manufacturer. We install what fits your home and budget. In Marietta, we frequently install Trane for homeowners who want proven reliability and strong parts availability, Lennox for high-efficiency models with quiet operation, and Goodman for solid value at a lower price point. Every installation includes the manufacturer’s parts warranty plus our 365-day labor guarantee. If the furnace fails within that first year due to our workmanship, we come back free. No argument.
Why Marietta Homeowners Choose Brandt HVAC Co Marietta
The name Brandt comes from an old word for a firebrand, the piece of burning wood that starts and sustains a fire. It’s a fitting name for work that keeps a home warm through Georgia’s coldest nights. But the reason people choose us has more to do with how we run the business than what we’re called.
Every Brandt technician is background-checked and identity-verified under the Threshold Verified standard. Before any visit, you receive the technician’s name and photo. When they arrive, they show a photo ID badge at the door. If someone arrives who you were not told to expect, that visit is on us. We make it right. That’s the standard.
Every job, including every furnace replacement, begins with a written price. You see the number, you approve it, then work starts. And every replacement is covered by the 365-Day Done Right Promise: if it’s not done right, we make it right. That includes a free return visit within the guarantee period.
We answer our phone with a live person 24 hours a day, 7 days a week. Nights, weekends, holidays. When your furnace dies on a January night in Marietta and the temperature drops into the 20s, you reach a human being, not a recording.
FAQs – Furnace Replacement
How much does furnace replacement cost in Marietta, GA?
Furnace replacement in Marietta typically costs $3,800 to $7,500 for most homes, with high-efficiency or dual-fuel systems running higher. Your exact price depends on your home’s size, ductwork condition, and the efficiency rating you choose. Call (478) 662-5175 for a free written estimate with no obligation.
Is it cheaper to repair or replace my furnace?
If your furnace is under 12 years old and the repair is under $700, repair usually makes financial sense. If the furnace is 15 or older and the repair is substantial, replacement often costs less over the next five years than continued repairs plus higher energy bills. We’ll give you both numbers in writing so you can decide without pressure.
Can you replace my furnace the same day?
In many cases, yes. We keep common furnace sizes and brands available locally, and for true no-heat emergencies in Marietta we can often complete a replacement within 24 hours. Call (478) 662-5175 and we’ll tell you our soonest available slot. A live person answers, day or night.
What does your furnace replacement guarantee cover?
Our 365-Day Done Right Promise covers the entire installation for one full year. If any part of our workmanship fails within 365 days, we return and correct it at no charge. The manufacturer’s parts warranty covers the furnace itself, typically 5 to 10 years depending on the brand and model. Both are provided in writing before you sign anything.
Get a Free Furnace Replacement Estimate in Marietta
Replacing a furnace is a significant decision, and you deserve straight answers before you spend a dollar. Call (478) 662-5175 to talk with someone who can answer your questions, schedule an inspection, and give you a written quote. You’ll know exactly who is coming, exactly what the job costs, and exactly what the guarantee covers. That’s how we’ve done it since 2003.
Written by Devin Marlowe, Owner at Brandt HVAC Co Marietta, serving Marietta.