Best Furnace & AC System Replacement in Columbia, SC
What to look for in Furnace & AC Replacement in Columbia
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 Columbia: 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 2 installers below publishes: Verify your state's HVAC contractor license through the state licensing board before paying a deposit.
Top picks
Stoudenmire Heating & Air Conditioning★ Best for Furnace + AC Changeout
Consistently strong customer feedback (4.9★ from 960+ Google reviews).
Google 4.9★ (960+)
Consistently strong customer feedback (4.9★ from 555+ Google reviews; 3.7★ from 9 Yelp reviews).
Google 4.9★ (555+)Yelp 3.7★ (9)
Typical Furnace & AC Replacement costs in Columbia, SC (2026)
Last updated
Estimated ranges for Columbia, 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–$10,650 |
How long should a Furnace Replacement in Columbia, SC actually take — and what affects the timeline?
- 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.
- How does combining a furnace and AC replacement affect the project timeline?
- Replacing both furnace and air conditioner usually extends the project by a day or more because installers coordinate refrigerant work and match system controls. Additional tasks include condenser hookup, refrigerant charging, and thermostat integration. Coordinating a single crew for both systems reduces total downtime but increases the continuous work window at the property.
- Do gas furnace replacements in Columbia require more time because of gas-line work and inspections?
- Yes. Gas furnace replacements commonly require shutoff, new fittings, pressure testing, and municipal or county inspection when applicable. Licensed technicians must complete leak and pressure tests and document results. Scheduling an inspection slot and coordinating a certified gas-safety sign-off can extend the timeline beyond mechanical install time.
- 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 Columbia, SC listed here. They send quotes back — no obligation.