Best Furnace Replacement Companies in Charleston, SC
What to look for in Furnace Replacement in Charleston
Furnace replacement is a 15-year decision — installer authorization and labor-warranty length matter as much as the equipment itself. A premium furnace installed by an unauthorized shop loses both manufacturer-warranty coverage and the labor-warranty backstop on the install.
- Furnace replacement specialization. Provider lists full furnace replacement (not just repair) as a service line — heat-load calc, gas-line work, venting, condensate handling for high-efficiency.
- Manufacturer authorization. Named factory-authorized dealer (Carrier, Trane, Lennox, Bryant, Rheem, Goodman, York). Unlocks the extended parts warranty (typically 10 years vs the 5-year baseline).
- Labor warranty length. Multi-year labor warranty on the install — measures the installer's confidence in their own workmanship. 5-year is competitive; 10-year is best-in-class.
Verify before you book
- Active manufacturer-dealer status in the OEM's directory — we accept self-claimed.
- Whether the labor warranty applies to the specific equipment SKU you're quoted — some warranties are dealer-funded, some manufacturer-funded.
- Pulled permits for the install — required in most jurisdictions; some shops skip them. Always ask for the permit number after the work.
Furnace Replacement in Charleston: dealer authorization + warranty
Furnace replacement separates pros from generalists on three published facts: manufacturer authorization tier, labor warranty length, and financing terms. Here is what each of the 4 contractors below publishes: Verify your state's HVAC contractor license through the state licensing board before paying a deposit.
Top picks
- NATE: ✓
- Financing: ✓
- Years: 10+
Google 4.9★ (1,305+)Yelp 3.8★ (45+)
- Mfg dealer: Trane Comfort Specialist Dealer
- Financing: ✓
- Years: 50+
Google 4.9★ (880+)Yelp 3.7★ (20+)
- NATE: ✓
- Financing: ✓
- Years: Unknown
Google 4.9★ (655+)Yelp 3.7★ (3)
- Warranty: 12-Year
- Financing: ✓
- Years: 10+
Google 4.9★ (1,045+)Yelp 4.3★ (25+)
Typical Furnace Replacement costs in Charleston, SC (2026)
Last updated
Estimated ranges for Charleston, SC. Actual cost varies with home size, equipment, and scope — always request a written quote for your job.
| Service | Typical range |
|---|---|
| Furnace replacement (installed) | $2,600–$7,400 |
| High-efficiency 95%+ AFUE upcharge (over standard 80%) | $695–$1,750 |
| Gas line + venting modification (if repositioned) | $260–$1,050 |
| Furnace + AC dual-system replacement (installed) | $6,950–$15,650 |
Why Charleston's humid summers make choosing the right "HVAC" system urgent
Charleston's hot, humid summers and coastal salt air accelerate HVAC wear. Homeowners searching for the best HVAC companies in Charleston, SC should prioritize licensed contractors with strong maintenance and emergency repair experience for humidity and salt‑air protection. Homeowners searching for best hvac companies in charleston sc should prioritize licensed contractors with strong maintenance and emergency repair experience.
Which Charleston HVAC questions do locals actually ask before booking a tech?
- Replace a gas furnace with another gas furnace, or switch to a heat pump?
- Stay with gas if your winter design temp is below 0°F and you have cheap natural gas — heat pumps still derate in extreme cold. Switch to a heat pump if winters are mild AND electricity isn't 2× the national rate AND a state rebate stacks. Run 10-year operating costs, not just install price.
- What AFUE rating should I look for in a new gas furnace?
- 95–98% AFUE for cold climates (condensing furnace; requires PVC venting and a condensate drain). 80% AFUE is acceptable in mild climates where the high-efficiency install premium doesn't pay back. Skip the 92–94% band — the price-to-efficiency curve is bad there.
- How do I find a contractor who improves humidity control and indoor air quality in Charleston homes?
- Look for providers who list dehumidification strategies, whole-home filtration, and variable-speed systems in service descriptions. Check reviews mentioning reduced indoor humidity and evidence of IAQ installs in neighborhoods like Downtown and West Ashley. Request manufacturer or technician credentials for IAQ work.
- How do I find a mini-split or heat-pump installer experienced with Charleston homes?
- Seek providers who advertise mini-split or heat-pump installation experience and who can show installation photos or references. Look for manufacturer-dealer status or installer certifications in listing details. Confirm local permit handling and coastal-weather installation practices.
- Do HVAC replacements require city permits or inspections in Charleston?
- Yes, replacements typically require permits and inspections, and licensed contractors usually secure them. Ask the contractor which permits apply and whether they will pull them. Confirm permit handling before signing a replacement agreement to avoid compliance delays.
- How do I get a quote from these HVAC companies?
- Submit one request on this page and we send it to the vetted HVAC pros in Charleston, SC listed here. They send quotes back — no obligation.