Furnace Replacement cost: Charleston vs Florence (2026)
Budget-wise, furnace replacement in Charleston ($5,350) runs 8% more than in Florence ($4,950), a roughly $400 spread.
Charleston SC
Typically around $5,350
Florence SC
Lower costTypically around $4,950
Charleston vs Florence: full breakdown
| Factor | Charleston | Florence |
|---|---|---|
| Typical 2026 cost | $5,350 | $4,950 |
| Estimated range | $3,800–$6,850 | $3,550–$6,350 |
| Labor index (vs US) | ×0.99 | ×0.93 |
| Climate zone | Hot | Hot |
| Climate factor | ×0.95 | ×0.95 |
| Local permit | $225 | $200 |
| Labor share | $3,200 | $2,950 |
| Materials/equipment | $2,150 | $2,000 |
Furnace replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
How much should this gap actually matter?
A 8% difference on furnace replacement is minor — you'll typically see a wider spread just from getting multiple quotes in the same city, so don't let location drive the decision.
Furnace replacement by type: Charleston vs Florence
We localize each furnace replacement type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Charleston | Florence |
|---|---|---|
| Gas furnace | $3,700–$6,750 | $3,450–$6,300 |
| High-efficiency gas furnace | $3,350–$6,750 | $3,100–$6,300 |
| Electric furnace | $2,100–$4,450 | $1,950–$4,150 |
Furnace replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Furnace replacement by home size: Charleston vs Florence
Furnace cost scales with the heating capacity (BTU) your home needs — roughly 40–45 BTU per square foot in a mixed climate. Larger homes need a bigger unit and more ductwork.
| Size | Charleston | Florence |
|---|---|---|
| 1,000 sq ft (≈45,000 BTU) | $2,850–$5,150 | $2,650–$4,800 |
| 1,500 sq ft (≈68,000 BTU) | $3,350–$5,900 | $3,100–$5,500 |
| 2,000 sq ft (≈90,000 BTU) | $3,800–$6,850 | $3,550–$6,350 |
| 2,500 sq ft (≈110,000 BTU) | $4,400–$7,800 | $4,100–$7,250 |
| 3,000 sq ft (≈130,000 BTU) | $4,950–$8,700 | $4,600–$8,150 |
| 3,500+ sq ft (≈150,000 BTU) | $5,500–$9,650 | $5,150–$9,000 |
Treat these as 2026 localized estimates for furnace replacement, not quotes from a contractor.
Cheapest time for furnace replacement in either city
Demand for HVAC work falls off a cliff in the shoulder months, and contractors discount to keep their crews booked. Wait for a 100-degree day or a hard freeze, though, and you're paying emergency rates for a system that just quit.
How much should you really budget for HVAC in 2026?
Sizing, efficiency tier and brand pull a quote in different directions. Here's how our editors weigh the trade-offs that decide what you actually pay.
The efficiency-first case
High runtime changes the math. In a demanding climate the extra efficiency of a heat pump or a top-tier SEER2/AFUE unit gets paid back month after month on the utility bill, and state and utility incentives can shave the upfront figure further now that the federal 25C/25D credits have expired. Price the lifetime bills, not just the tag, before you default down.
The budget-first case
Size the system to your home with a Manual J calculation and buy the standard efficiency tier (80% AFUE / 14.3 SEER2). In a mild climate the cheaper unit pays off because you rarely run it hard — paying for premium efficiency you won't use is the most common way to overspend.
The longevity case
The single biggest cost driver isn't the brand — it's correct sizing and install quality. A properly sized, well-commissioned mid-tier system with annual maintenance outlasts an oversized premium unit that short-cycles. Spend on the install, not the badge.
The brand on the unit matters far less than getting the sizing and installation right. Insist on a Manual J calculation, match efficiency to your climate, and claim every rebate available.
Charleston vs Florence
Is furnace replacement cheaper in Charleston or Florence?
Florence comes out ahead here, at roughly $4,950 for furnace replacement compared with $5,350 in Charleston — a 8% ($400) gap as of 2026.
Why does furnace replacement cost more in Charleston than Florence?
The main driver is local labor rates: Charleston's labor index is 0.99 versus 0.93 in Florence. Climate zone (hot vs hot) and permit fees also shift the total.
How much is furnace replacement in Charleston, SC?
furnace replacement in Charleston runs $3,800–$6,850 as of 2026 — most jobs land near $5,350.
When is the cheapest time to buy furnace replacement — and does it differ by city?
No, the seasonal pattern is the same in Charleston and Florence: book during Spring and fall (Mar–May, Sep–Oct) for about 5–15% in savings. Peak summer and mid-winter is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on furnace replacement cost?
That would be a stretch. $400 is a one-time difference, not an ongoing one, and off-season buying plus apples-to-apples bids in Charleston can close a good chunk of it. What matters more long-term is energy costs, climate and the condition of the home.
Compare furnace replacement in other cities
Updated June 2026 · By Serhat Özçelik