Should I replace the AC and furnace 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 one has failed and the other is newer, a good installer confirms the AHRI match instead of upselling the pair.

Does replacing both as a system improve efficiency?

Yes, when it's done as a matched set. The rated SEER2 only holds for an AHRI-certified combination of condenser, coil, and air handler, and a whole-system changeout is the moment to right-size with an ACCA Manual J load calculation rather than copying the old equipment.

Do Florence contractors handle combined AC and furnace replacements for whole-house projects?

Yes. Many contractors in the evaluated list handle AC and furnace combinations for matched split systems. For combined replacements, verify the provider’s experience with matched-system installations and confirm that the proposal includes compatibility checks, controls integration, and any necessary permitting.

When should a homeowner replace the outdoor condenser rather than repair it in Florence's humid climate?

Replace the condenser when widespread coil corrosion, repeated compressor failures, or mismatched refrigerant types exist. In Florence's humid summers, repeated electrical and compressor issues often signal major condenser wear. Have a certified technician inspect the unit and explain why replacement is recommended versus continued repairs.

How do I get a quote from these AC replacement companies?

Submit one request on this page and we send it to the vetted AC replacement pros in Florence, SC listed here. They send quotes back — no obligation.

Best AC & Furnace System Replacement in Florence, SC

Last updated June 27, 2026

What to look for in AC & Furnace Replacement in Florence

A whole-system changeout is the moment to right-size with a Manual J load calc and match the coil, condenser, and air handler 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 AC-plus-furnace or air-handler system replacement with the AHRI-matched combination — 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 coil, condenser, and air handler form an AHRI-certified combination — request the AHRI Reference Number.
License status with your state board — verify TDLR (TX), ROC (AZ), DBPR (FL), or your local equivalent before paying.

See full ranking methodology for AC & Furnace Replacement →

AC & Furnace 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 coil, condenser, and air handler so the rated efficiency is real. Here is what each of the 2 installers below publishes: Verify your state's HVAC contractor license through the state licensing board before paying a deposit.

How we rank AC & Furnace Replacement providers → · Top picks meet at least one of: a category award, ≥2 verified signals, or Vouched Score ≥ 70.

Top picks

Quality Service Company
Consistently strong customer feedback (4.9★ from 920+ Google reviews; 3.6★ from 7 Yelp reviews).
Google 4.9★ (920+)Yelp 3.6★ (7)
Cook Comfort Systems LLC
Consistently strong customer feedback (4.9★ from 70+ Google reviews).
Google 4.9★ (70+)

Typical AC & Furnace Replacement costs in Florence, SC (2026)

Last updated June 21, 2026

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 AC system replacement (3-ton, installed)	$4,500–$10,600
Furnace replacement (installed, paired changeout)	$2,450–$6,900
R-454B equipment upcharge (vs equivalent R-410A tier)	$325–$975

Why Florence, South Carolina Summers Wear Out "AC Replacement" Units

Hot, humid summers and high seasonal AC use put heavy wear on residential systems in Florence, increasing replacement cycles for older units. Homeowners searching for best AC replacement companies in Florence, SC should plan for load-rated equipment, proper sizing, and upfront warranties.

How long does an "AC Replacement" take in Florence, SC — and who handles emergency scheduling?

Should I replace the AC and furnace 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 one has failed and the other is newer, a good installer confirms the AHRI match instead of upselling the pair.
Does replacing both as a system improve efficiency?: Yes, when it's done as a matched set. The rated SEER2 only holds for an AHRI-certified combination of condenser, coil, and air handler, and a whole-system changeout is the moment to right-size with an ACCA Manual J load calculation rather than copying the old equipment.
Do Florence contractors handle combined AC and furnace replacements for whole-house projects?: Yes. Many contractors in the evaluated list handle AC and furnace combinations for matched split systems. For combined replacements, verify the provider’s experience with matched-system installations and confirm that the proposal includes compatibility checks, controls integration, and any necessary permitting.
When should a homeowner replace the outdoor condenser rather than repair it in Florence's humid climate?: Replace the condenser when widespread coil corrosion, repeated compressor failures, or mismatched refrigerant types exist. In Florence's humid summers, repeated electrical and compressor issues often signal major condenser wear. Have a certified technician inspect the unit and explain why replacement is recommended versus continued repairs.
How do I get a quote from these AC replacement companies?: Submit one request on this page and we send it to the vetted AC replacement pros in Florence, SC listed here. They send quotes back — no obligation.