Best Commercial Furnace Replacement Companies in Marietta, GA
What to look for in Commercial Furnace Replacement in Marietta
Commercial replacement means rooftop and packaged heating units, crane sets, curb adapters, and downtime that costs the business by the hour. We weight installers who document RTU and light-commercial work over residential shops scaling a job up.
- Commercial RTU specialization. Provider names rooftop-unit / packaged-unit / make-up-air replacement with scope detail (crane set, curb adapter) — not a residential job description.
- Manufacturer authorization. Factory-authorized status on commercial equipment preserves the warranty and reflects factory training.
- Google rating. A strong rating floor is the minimum trust threshold for commercial work.
Verify before you book
- Crane / rigging capability and curb-adapter fabrication for your specific roof — confirm directly.
- Commercial bonding and any facility insurance requirements — verify before scheduling.
- License status with your state board — verify TDLR (TX), ROC (AZ), DBPR (FL), or your local equivalent before paying.
See full ranking methodology for Commercial Furnace Replacement →
Commercial Furnace Replacement in Marietta: scope + access
Commercial replacement is bid on system access (rooftop units, crane sets, curb adapters), equipment scale, and after-hours scheduling that protects the business day. Here is what each of the 1 installer below publishes: In Georgia, HVAC contractors hold a Conditioned Air Class I or II license through the Secretary of State — verify before signing.
Top picks
Coolpro Heating and Cooling★ Best for Commercial Furnace Replacement
Consistently strong customer feedback (5.0★ from 640+ Google reviews; 4.8★ from 10 Yelp reviews).
Google 5.0★ (640+)Yelp 4.8★ (10)
Typical Commercial 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 |
|---|---|
| Commercial rooftop heating / packaged-unit replacement (3-5 ton, installed) | $6,150–$14,100 |
| Commercial gas furnace / make-up air unit replacement (installed) | $4,400–$12,350 |
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.
How quickly do Marietta "Furnace Replacement" pros usually respond and what should I ask?
- How is commercial furnace replacement different from residential?
- Commercial work usually means rooftop or packaged heating units (or make-up air units) that need crane access, curb adapters, and controls integration, and it's priced by unit scale rather than a flat residential range. Look for an installer who documents commercial/RTU experience, not a residential shop scaling a job up.
- How is a commercial furnace replacement priced?
- Mostly by equipment scale and access — crane set, curb adapter, gas and electrical, and any controls or economizer work — plus after-hours scheduling to protect the business day. Get an itemized, per-unit quote that separates the equipment from the access and crane costs.
- 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.
- 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.
- 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.