Best Furnace & AC System Replacement in Florence, SC
What to look for in Furnace & AC Replacement in Florence
A whole-system changeout is the moment to right-size with a Manual J load calc and match the furnace, coil, and condenser so the rated efficiency is real. We weight installers who publish matched-system practice, manufacturer authorization, and Manual J sizing for the full job.
- Whole-system / matched install. Provider names furnace-plus-AC or furnace-plus-coil system replacement as a matched changeout — not two separate, unmatched halves.
- Manufacturer authorization + labor warranty. Factory-authorized status and a multi-year labor warranty preserve coverage across the whole new system.
- Manual J sizing. An ACCA Manual J load calculation right-sizes the system instead of copying the old (often oversized) equipment.
Verify before you book
- Whether a Manual J load calculation was actually performed — ask to see the load-calc result.
- That the furnace, coil, and condenser form a matched combination — request the model numbers and AHRI listing.
- License status with your state board — verify TDLR (TX), ROC (AZ), DBPR (FL), or your local equivalent before paying.
Furnace & AC Replacement in Florence: matched system + sizing
A whole-system changeout is the moment to right-size with a Manual J load calc and match the furnace, coil, and condenser so the rated efficiency is real. Here is what each of the 1 installer below publishes: Verify your state's HVAC contractor license through the state licensing board before paying a deposit.
Top picks
Quality Service Company★ Best for Furnace + AC Changeout
Consistently strong customer feedback (4.9★ from 920+ Google reviews; 3.6★ from 7 Yelp reviews).
Google 4.9★ (920+)Yelp 3.6★ (7)
Typical Furnace & AC Replacement costs in Florence, SC (2026)
Last updated
Estimated ranges for Florence, SC. 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) | $2,450–$5,300 |
| Full AC system replacement (paired changeout, installed) | $4,500–$10,600 |
Why Florence's Heating Needs Demand Proper "Furnace Replacement" (South Carolina)
Florence's humid winters and cold snaps increase wear on aging furnaces; schedule timely replacements. Homeowners often search for the best furnace replacement companies in florence south carolina to find licensed furnace replacement contractor florence sc. Seasonal demand can affect scheduling.
Which permit and insurance checks should Florence homeowners ask about before a "Furnace Replacement"?
- Should I replace the furnace and AC at the same time?
- If both are near end of life, replacing together gives you one matched, right-sized system, one labor mobilization, and aligned warranties — often cheaper than two separate jobs. If only the furnace has failed and the AC is newer, a good installer confirms the new furnace and coil work with your existing equipment instead of upselling the pair.
- Does replacing both as a system improve efficiency?
- Yes, when it's done as a matched set. The furnace, indoor coil, and AC condenser are rated to work together, and a whole-system changeout is the moment to right-size with an ACCA Manual J load calculation rather than copying the old (often oversized) equipment. Ask the installer to size the whole system, not just swap boxes.
- What questions should I ask if replacing a furnace at the same time as my air conditioner?
- Ask whether the contractor coordinates system sizing and compatibility for combined furnace-and-AC replacements. Confirm that the installer will verify ductwork condition, electrical capacity, and refrigerant handling credentials. Request clear scope, timeline, and which permits will be pulled for the combined job.
- 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 Florence, SC listed here. They send quotes back — no obligation.