20 Best Furnace Replacement Companies in Marietta, GA (2026)
Why Marietta's winters make choosing a "Furnace Replacement" contractor different
Marietta winters bring chilly nights and occasional freezes that expose aging heating systems in older bungalows and brick ranches. Choosing the best furnace replacement companies in Marietta, GA matters because local installers know county codes and common duct layouts. Also consider advertised warranties and emergency service availability.
Quick Picks
Awards based on the same publicly available signals as the Vouched Score, including provider-stated certifications and dealer status. Not independently verified.
What separates these 20 Marietta "Furnace Replacement" listings on review depth and warranties
| # | Provider | Score | BBB | Years | Best for | |
|---|---|---|---|---|---|---|
| 1 | EE. Smith Heating & Air Conditioning | 88 | 4.9 (1,830+) | — | 64+ | ★ Highest Vouched ScoreFurnace + AC ChangeoutManufacturer-Authorized Installer |
Editorial: Lists furnace and matched furnace+AC system changeouts with Carrier equipment. Strengths:
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| 2 | BBartlett Heating & Cooling | 87 | 5.0 (2,000+) | — | 37+ | NATE-Certified Installer |
Editorial: Carrier Factory Authorized Dealer status appears on Bartlett's site and dealer pages. NATE-certified technicians are listed as a core credential for their team. Bartlett notes background-checked technicians and stocked trucks for faster in-home fixes. Marietta homeowners face varied older housing stock and occasional cold snaps needing safe combustion checks. The site advertises 24/7 emergency and same-day service availability. Strengths:
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| 3 | CCoolpro Heating and Cooling | 83 | 5.0 (640+) | — | 30+ | High-Efficiency (95%+ AFUE) UpgradesCommercial Furnace Replacement |
Editorial: furnace replacement work highlighted with full-system changeouts and named high-efficiency lines. Coolpro lists NATE-certified technicians on its site. Coolpro advertises financing through Wells Fargo for larger changeouts. Coolpro ties services to metro Atlanta weather and typical older Marietta homes. Coolpro cites over 30 years of local experience in Cobb County. Strengths:
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| 4 | GGarrett Mechanical | 82 | 4.9 (1,075+) | — | 16+ | — |
Editorial: Furnace replacement work is a core focus, with furnace and full-system jobs noted. Garrett Mechanical lists Carrier Authorized dealer status for installs. Garrett Mechanical reports NATE-certified technicians on staff. The company cites same-day emergency response across Metro Atlanta. Serving Marietta means readiness for occasional cold snaps and nearby suburban housing stock. Strengths:
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| 5 | AAir Force Heating & Air | 81 | 4.8 (1,225+) | — | — | Honest Replace-vs-Repair |
Editorial: Emergency response: Air Force Heating & Air advertises same-day and 24/7 availability. The company lists financing via the Spectrum Platform and Wells Fargo. Air Force Heating & Air says it gives honest repair-or-replace advice to customers. The business serves West Georgia and East Alabama, including Marietta-area homes. Strengths:
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| 6 | SSummit | 79 | 5.0 (555+) | — | — | — |
Editorial: Honest assessment is emphasized; the site says repairs are attempted before recommending replacement. Strengths:
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| 7 | CCasteel Heating, Cooling, Plumbing & Electrical | 78 | 4.8 (10,410+) | — | 39+ | Gas Furnace Replacement |
Editorial: Furnace replacement focus: furnace_replacement work is offered with full-system changeouts noted. Experience: Casteel lists 35+ years serving metro Atlanta homeowners. Service model: Casteel advertises flat-rate pricing and 0% financing on major repairs. Local note: Marietta winters are mild but freeze spells require correct combustion commissioning. Online presence: Casteel reports a very large volume of online reviews across platforms. Strengths:
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| 8 | SSelf Brothers Heating & Cooling | 78 | 5.0 (630+) | — | — | — |
Editorial: Self Brothers lists furnace replacement among its residential HVAC services on its website. The company operates from a Marietta address on Cumberland Point Drive. Marietta's occasional freezes mean gas furnaces benefit from combustion checks and proper venting. Google reviewers frequently reference fast scheduling and timely technician arrivals. Strengths:
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| 9 | CCoolray Heating & Air Conditioning | 77 | 4.8 (10,920+) | — | 60+ | — |
Editorial: Coolray leads with large-scale furnace and full system replacements across Metro Atlanta. Coolray advertises a lifetime parts and labor warranty. Founded in 1966, Coolray lists 60+ years serving Georgia homeowners. Coolray's site notes same-day emergency response for failed furnaces in cold snaps. Strengths:
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| 10 | EE. Dennis Heating, Cooling, Plumbing & Electrical | 74 | 4.9 (5,325+) | — | — | — |
Editorial: Financing options are listed for larger furnace changeouts, per their site. E. Dennis advertises emergency service and same-day availability. The company lists full HVAC, plumbing, and electrical trade capabilities across Marietta. Marietta summers and mild winters make correct sizing and matched-system installs especially important here. The website lists transparent pricing and certified technicians. Strengths:
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| 11 | SSwift Brothers Plumbing, Heating & Air | 74 | 4.8 (545+) | — | — | — |
Editorial: Swift Brothers advertises same-day emergency furnace replacements for Marietta homeowners. Swift Brothers lists licensed HVAC technicians on their Marietta page. Swift Brothers serves Georgia alongside North Carolina and Florida service areas. Swift Brothers shows 500+ Google reviews for local installations and repairs. Strengths:
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| 12 | CCool Air Mechanical | 72 | 4.9 (10,915+) | — | — | — |
Editorial: Cool Air Mechanical advertises 24/7 emergency response and same-day replacements. 770CoolAir lists financing available for higher-cost furnace changeouts. Cool Air Mechanical says technicians live and work in Marietta, aiding quick local response. Marietta's occasional cold snaps make fast furnace turnaround important for older homes here. Strengths:
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Typical Furnace Replacement costs in Marietta, GA (2026)
Last updated
Estimated ranges for Marietta, GA. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| Full gas furnace replacement (80% AFUE, installed) | $2,650–$5,700 |
| High-efficiency condensing furnace (95%+ AFUE, installed) | $3,950–$8,350 |
| Modulating / two-stage variable-speed (ECM) furnace upcharge | $530–$1,750 |
| Condensing-furnace venting + condensate conversion (80%->95% AFUE) | $530–$1,600 |
| Gas line / electrical / permit modification (changeout) | $130–$795 |
| Electric furnace / air-handler replacement (installed) | $1,750–$4,400 |
Nearby Georgia furnace replacement pricing: Albany · Alpharetta · Athens
See broader context: Furnace Replacement pricing in Georgia · Furnace Replacement pricing nationwide
How were these Marietta "Furnace Replacement" companies evaluated?
This guide evaluated 20 Marietta furnace replacement providers on review score, review volume, emergency availability, warranties, certifications, pricing models, and dealer status. Signals come from aggregated Google Maps data and cross-checks against available BBB records and the Georgia Construction Industry Licensing Board and provider disclosures. Results emphasize verifiable credentials and customer feedback.
- Bartlett Heating & Cooling lists NATE-certified technicians and free estimates, per the provider's published services.
- E. Smith Heating & Air Conditioning notes Carrier factory-dealer status and NATE certification on its site.
- Coolray Heating & Air Conditioning lists flat-rate pricing and a lifetime labor warranty (advertised).
- Garrett Mechanical reports flat-rate pricing and Carrier dealer status, and notes background-checked technicians.
- Coolpro Heating and Cooling lists NATE certification, high-efficiency equipment, and free estimates on its public profile.
Aggregate metrics, including the 4.88 average rating and 44,914 total reviews, are based on Google Maps data and provider listings.
How do I choose a furnace replacement company in Marietta?
- Verify licenses and dealer status against Carrier or manufacturer directories.
- Compare quoted pricing models, noting flat-rate versus time-and-materials.
- Confirm warranty details and whether labor coverage is advertised.
- Request references or recent job photos for similar homes.
- Check Google reviews and BBB records and the Georgia Construction Industry Licensing Board for complaint history.
5 furnace issues Marietta homeowners report most often (and what to check first)
Common furnace problems in Marietta stem from occasional freeze–thaw events, high summer humidity, and older home systems that sit idle for months. Homeowners most often see cracked heat exchangers after cold snaps, failed igniters after humid summers, and premature fan motor wear in aging installations.
- Cracked or corroded heat exchanger. Marietta's occasional freezes stress metal joints in older furnaces, causing hairline cracks and corrosion that lead to inefficiency and safety concerns.
- Failed ignition or pilot systems. High summer humidity in Marietta promotes condensation and corrosion in ignition components, which then fail when the furnace runs during cold snaps.
- Fan motor and blower wear. Long idle periods followed by heavy winter starts in Marietta increase motor load, accelerating bearing and capacitor failures on older units.
- Short cycling and refrigerant-related issues. Seasonal swings between humid summers and chilly nights can cause improper airflow and pressure imbalances, which make Marietta furnaces short-cycle and strain heat exchangers.
- Clogged filters and restricted airflow. High pollen and humidity in Marietta load filters faster than expected, reducing combustion air and causing overheat trips or uneven heating.
What Marietta's population size and local codes mean for your "Furnace Replacement" project
Marietta, GA's moderate population and mixed housing stock mean many furnaces are older and near end-of-life. Local code alignment and occasional freeze events increase demand for code-compliant, high-efficiency furnace replacements and certified installers who can meet permitting and ventilation requirements.
Marietta's population near 61,000 supports a competitive market with multiple licensed contractors available quickly. That density makes same-week scheduling feasible for many projects. It also encourages firms to offer emergency service and flat-rate pricing to stand out.
Local building codes follow the 2021 IECC. This affects minimum efficiency, duct sealing, and combustion-air requirements. Look for providers who document compliance and prepare permit-ready install plans.
- Housing stock: Older homes often have undersized ducts and legacy chimneys. These issues increase heat loss and require furnace sizing and venting expertise.
- Impact: Improper sizing raises cycling and reduces lifespan. Proper load calculations prevent short cycling and comfort issues.
- Provider capability: Evaluated providers list furnace-type expertise and efficiency-tier recommendations. Seek installers who perform Manual J load calculations and explain furnace selection clearly.
- Climate stress: Occasional freezes create thermal shock on aging heat exchangers and controls.
- Impact: Thermal stress accelerates metal fatigue and component failure during first cold snaps.
- Provider capability: Many evaluated companies advertise 24/7 emergency service and NATE-certified technicians to diagnose heat-exchanger and ignition problems quickly.
- Code and permitting: Georgia oversight requires licensed contractors and adherence to IECC provisions for efficiency and ventilation.
- Provider capability: The shortlist includes Carrier-authorized dealers and NATE-certified teams familiar with permit submissions and code-compliant venting.
- Pricing and scheduling: Marietta buyers value transparent costs and quick turnarounds.
- Provider capability: Several firms offer flat-rate pricing models and documented warranty terms, which simplify comparison and budgeting.
How quickly do Marietta "Furnace Replacement" pros usually respond and what should I ask?
- How do I get a quote from these furnace replacement companies?
- Submit one request on this page and we send it to the vetted furnace replacement pros in Marietta, GA listed here. They send quotes back — no obligation.
- How much does furnace replacement service cost in Marietta, GA?
- Full gas furnace replacement typically runs $2,650–$5,700, and high-efficiency condensing furnace runs $3,950–$8,350 in Marietta, Georgia. See the Furnace Replacement pricing table on this page for the full per-service breakdown.
- Do Marietta furnace replacements require a city permit for venting or fuel-line work?
- Yes. Replacing a furnace that changes venting or fuel piping requires a city permit and inspection. Marietta follows the 2021 IECC and state oversight from the Georgia Construction Industry Licensing Board. Ask any contractor to show the permit application process they use and confirm who files permits and attends final inspections.
- Is a licensed contractor required for gas furnace replacement in Marietta?
- Yes. A licensed trade contractor is required for gas furnace replacements that connect to natural gas lines. The Georgia Secretary of State's Construction Industry Licensing Board governs trade licensing. Request the contractor's license number and ask which scope requires a master gas fitter or subcontracted plumber.
- How do I find a high-efficiency furnace specialist in Marietta?
- Look for providers who document Manual J load calculations and list high-efficiency furnaces with manufacturer-dealer status. Ask for written load calculations, equipment efficiency ratings that meet the 2021 IECC, and examples of recent installs in similar brick ranch or bungalow homes. Verify technician NATE or manufacturer certifications.
- Can Marietta contractors offer same-day furnace replacement and what are the limits?
- Some contractors advertise same-day replacement for like-for-like equipment and available stock. Same-day service typically depends on dealer inventory, permit needs, and access to the home's existing venting. Confirm whether same-day work includes permit filing, gas-line inspection, and warranty activation before agreeing.
- What credentials should I check for a gas furnace installer in Marietta?
- Check the contractor's Georgia trade license, proof of insurance, and any NATE or manufacturer training certificates for gas equipment. Ask to see the license number and confirm the business files permits with the city. Also request evidence of past gas-furnace installs and references from Marietta homeowners if available.
- Will replacing a furnace at the same time as an air conditioner change permit or code requirements in Marietta?
- Possibly. Combined furnace and AC replacements can affect ductwork, airflow, and IECC efficiency compliance. That can change permit scope. Ask whether the contractor includes duct work, airflow testing, and permit submission in a combined-project quote to ensure installations meet local code.
- Do commercial furnace replacement projects follow different rules in Marietta?
- Yes. Commercial projects often require additional permits, different licensing tiers, and more detailed engineering documentation. Confirm the contractor's commercial credentials and familiarity with commercial permit workflows in Cobb County. Request references for similar commercial installs and written compliance plans.
- Are oil furnace replacements common in Marietta and what should owners of oil systems ask?
- Oil furnaces are less common but still present in older Marietta homes. Owners should ask about tank removal or abandonment rules, local fuel-code compliance, and licensed installers familiar with oil-to-gas conversions. Verify disposal plans and any additional permits required for fuel-system changes.