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HVAC · San Antonio, TX · 2026 cost guide
How much does AC replacement cost in San Antonio, TX?
In the San Antonio-New Braunfels, TX area, replacing a central air conditioner runs about $4,700 to $10,200 installed in 2026, about 15% below the national range. Contractor labor here is indexed at 0.85 against the U.S. average, and that is what moves the numbers; equipment and materials cost about the same everywhere.
- Central AC
- $4,700–$10,200condenser and coil, installed
- Heat pump
- $6,000–$13,600heats and cools, installed
- AC + furnace
- $7,700–$17,000full split system
- Ductless mini-split
- $3,400–$11,900one to four zones
Replacing central air in San Antonio costs $4,700 to $10,200 installed installed for most homes. The system you buy will run about seven months a year through 3,200 cooling degree days and long 100-degree stretches, so efficiency matters more here than in most of the country, even with CPS Energy's rate of about $0.135 per kWh sitting below the Texas average. Heating is light, at 1,500 degree days, which makes a heat pump the natural replacement for many homes.
What's different in San Antonio
Sizing in San Antonio is about heat first and humidity second. Climate zone 2A here leans semi-arid on the west and north sides, so a Manual J load calculation usually lands smaller than the old rule-of-thumb tonnage, especially in newer north-side homes with better insulation. Bigger is not safer; an oversized unit short-cycles and never runs long enough to dry the air in the humid May and June weeks. Attic ducts in this climate leak and heat-soak, so have the installer test and seal them, and consider a two-stage or variable-speed condenser that runs low and long through a 100-degree afternoon.
With only 1,500 heating degree days, a heat pump covers San Antonio winters easily, and the occasional hard freeze is handled by strip heat or by keeping the existing gas furnace as backup in a dual-fuel setup. CPS Energy supplies both the electricity and the natural gas, so the operating-cost comparison is on one bill. CPS Energy runs residential efficiency programs and has offered rebates on high-efficiency equipment in past years; ask each installer which rebates are open now and who files the paperwork. Texas has no state income tax credit, the federal credit ended after 2025, and manufacturer promotions in spring and fall are the other lever.
Any new split system here must meet the 14.3 SEER2 minimum for the Southeast region, and installers here commonly recommend 15 to 17 SEER2 as the sweet spot for the run hours. City of San Antonio Development Services requires a mechanical permit for a change-out, and the suburbs in Comal and Guadalupe counties permit separately; the TDLR-licensed contractor should pull the permit in their name. Set the condenser on a raised pad if the yard drains toward it, since flash flooding after a Hill Country storm can swamp a low pad, and keep it off a west wall in afternoon sun where possible.
AC Replacement prices in San Antonio vs. the national guide
These are the ranges from our national AC replacement cost guide next to the same items scaled by the San Antonio, TX labor index of 0.85. Rows marked fixed are materials only and do not move with local labor.
| Item | National range | San Antonio, TX |
|---|---|---|
| Central AC | $5,500–$12,000 | $4,700–$10,200 |
| Heat pump | $7,000–$16,000 | $6,000–$13,600 |
| AC + furnace | $9,000–$20,000 | $7,700–$17,000 |
| Ductless mini-split | $4,000–$14,000 | $3,400–$11,900 |
Local tip: Get the Manual J and the duct leakage test in writing before you compare bids; in San Antonio's attic heat a sealed duct system often lets you buy a smaller, cheaper unit.
San Antonio at a glance
- Climate zone
- 2Ahot-humid / semi-arid
- Labor index
- 0.85vs. U.S. average 1.00
- Cooling degree days
- 3,200per year, base 65 °F
- Heating degree days
- 1,500per year, base 65 °F
- Min. AC efficiency
- 14.3 SEER2federal minimum for this region
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What SEER2 rating makes sense in San Antonio?
The legal floor for Texas is 14.3 SEER2, but with about 3,200 cooling degree days and a season that runs April through October, a 16 to 17 SEER2 unit usually pays back its premium in a few summers even at CPS Energy's rate of about $0.135 per kWh. Going above 18 SEER2 buys comfort and quiet more than savings unless you run the house cold all summer.
Should I switch from a gas furnace to a heat pump in San Antonio?
Often yes. Heating is a minor load here, about 1,500 degree days, and a heat pump handles it while giving you a new, efficient air conditioner in the same box. Keep the furnace as dual-fuel backup if it is still sound, since it covers the rare hard freeze cheaply on CPS Energy gas. If the furnace is also old, replacing both at once saves a second labor charge.
Are there CPS Energy rebates for a new AC?
CPS Energy has offered residential rebates on high-efficiency AC and heat pump equipment in past program years, and the amounts and rules change with each budget cycle. Ask the installer to list what is open for your address and who submits the claim, and confirm on CPS Energy's site before you sign. There is no Texas state credit and no federal credit for 2026 installs.
How long does AC replacement take in San Antonio, and when should I schedule it?
A straight change-out is a one-day job, two if the furnace or line set goes too. Schedule it for October through March if you can; crews in San Antonio are booked solid from late May, and spring and fall are when manufacturer promotions run. Waiting for a July failure means an emergency install at the worst pricing of the year and possibly days without cooling.
AC Replacement costs in nearby metros
AC Replacement cost in Austin, TX
Austin-Round Rock-San Marcos, TX. Labor index 0.95, climate zone 2A.
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Dallas-Fort Worth-Arlington, TX. Labor index 0.90, climate zone 3A.
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St. Louis, MO-IL. Labor index 1.05, climate zone 4A.
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Denver-Aurora-Centennial, CO. Labor index 1.00, climate zone 5B.
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