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AfterHow Much Does Furnace Replacement Cost in San Antonio?
A full furnace replacement in San Antonio typically runs between $4,200 and $8,900, with most homeowners landing around $5,800 for a mid-efficiency unit sized for a 2,000-square-foot home. High-efficiency systems with advanced features can push toward $11,000, while budget-friendly replacements in smaller homes sometimes come in under $4,000. The final number depends on furnace efficiency rating, brand, home size, and whether your ductwork needs work.
We’ll break down exactly where that money goes, what drives costs up or down in the San Antonio market, and how to avoid paying more than you should. No vague estimates here, just real numbers based on jobs we’ve quoted across Bexar County.
Key Takeaways: Furnace Replacement Cost in San Antonio
- Typical range: $4,200 to $8,900 for a complete furnace replacement in San Antonio
- Most common price point: $5,500 to $6,500 for a mid-efficiency furnace with standard installation
- Installation labor: $1,800 to $3,500 of the total, depending on complexity and access
- Replacement time: Most jobs finish in 4 to 8 hours, same-day in many cases
- Biggest cost drivers: Efficiency rating (AFUE), furnace size (BTUs), brand, and whether ductwork modifications are needed
- Free estimates: Halden Heating and Air San Antonio provides written, no-obligation quotes with line-item pricing
Furnace Replacement Cost Breakdown (2026)
Here’s what a furnace replacement in San Antonio actually costs by component. These numbers reflect our quoted jobs across neighborhoods like Alamo Heights, Stone Oak, Helotes, and the Dominion throughout 2024 and into 2026. We publish them because written pricing before work starts is the only way we operate.
| Cost Component | Typical Range (San Antonio) | Notes |
|---|---|---|
| Furnace unit (mid-efficiency, 80% AFUE) | $1,800 – $3,200 | Goodman, Rheem, and Carrier entry-level units fall here. Sized 60,000-80,000 BTU for typical San Antonio homes. |
| Furnace unit (high-efficiency, 95%+ AFUE) | $3,000 – $5,500 | Trane, Lennox, and Carrier high-efficiency models. Rebates from CPS Energy can offset $300-$800. |
| Installation labor | $1,800 – $3,500 | Includes removal of old unit, gas line connection, venting, electrical hookup, and startup testing. Attic installs in San Antonio add time because of heat and tight access. |
| Thermostat (if replacing) | $80 – $350 | Basic digital to smart thermostat. Many homeowners upgrade to a Wi-Fi unit during replacement. |
| Ductwork modifications | $300 – $1,800 | New furnace may need a transition piece to existing ducts. Older San Antonio homes sometimes need plenum replacement. |
| Permits and inspection | $80 – $250 | City of San Antonio mechanical permit required for furnace replacement. Reputable contractors include this in the quote. |
| Old furnace removal and disposal | $75 – $200 | Typically bundled into labor. Confirm it’s included so it doesn’t surprise you. |
So a realistic all-in range for a complete furnace replacement in San Antonio sits between $4,200 and $8,900. The spread comes down to what you choose on efficiency, brand, and whether your existing ductwork cooperates.
One thing specific to San Antonio: many homes here are slab-on-grade with the furnace in a hall closet or attic, not a basement. Attic replacements in July and August are brutal for technicians and often take an hour or two longer. That heat doesn’t change the equipment price, but it can bump labor on a case-by-case basis. We quote it upfront so you know exactly what you’re paying before we start.
What Affects Furnace Replacement Pricing in San Antonio
Six things move the needle on your final quote. Here’s what we look at when we build a written estimate for a San Antonio home.
- Furnace efficiency rating (AFUE). An 80% AFUE furnace converts 80 cents of every gas dollar into heat; a 95%+ unit wastes far less. High-efficiency units cost $1,200 to $2,700 more upfront but typically cut your winter gas bill by 15-20%. For a San Antonio winter that’s short but still cold enough for sustained furnace use from November through February, you’ll feel the difference over 15-20 years of equipment life.
- Home size and BTU requirements. A 1,200-square-foot Alamo Heights bungalow needs a 40,000-60,000 BTU furnace. A 3,500-square-foot Stone Oak two-story needs 100,000+ BTU. Bigger unit, bigger price. We calculate the heat load from your home’s square footage, insulation, and window exposure, not a rule of thumb.
- Brand selection. Goodman and Rheem run at the value end. Trane, Lennox, and Carrier sit mid-to-premium. You’re paying for build quality, part availability, and warranty terms. Halden services all of them, so we’re not pushing you toward one brand. We give you options at two or three price points and explain the trade-offs.
- Ductwork condition and compatibility. Older San Antonio homes, especially pre-1990 builds in neighborhoods like Jefferson and Monticello Park, often have undersized returns or aging plenums. If your new furnace needs a custom transition or a return air modification, that’s $300 to $1,800 added. We’ll tell you during the estimate walkthrough, not after we start.
- Furnace location and access. Closet installs on the first floor are fastest. Attic installs take longer, especially in summer when attic temperatures in San Antonio top 130°F. Crawlspace access, unusual venting configurations, or a furnace in a converted garage can all add labor time. This is where a company that gives written pricing before work starts earns its keep; you’ll see exactly what the access situation costs.
- Time of year. San Antonio furnace replacements cluster from October through January when the first cold snap hits. Demand pushes labor rates slightly higher. If your furnace is limping along in August, you’ll often get faster scheduling and occasionally better pricing during the HVAC shoulder season.
How to Save on Furnace Replacement
You don’t have to pay top of the range. Here’s what actually works, based on what we see from the estimating side.
- Get three written quotes, but compare line items, not just totals. A $5,200 quote that excludes permits and disposal may end up costing more than a $5,600 quote that includes everything. Ask each contractor: is the permit included? Is old unit disposal included? Is the thermostat included? If they won’t itemize, that’s your signal.
- Check CPS Energy rebates before you buy. CPS Energy runs rebate programs for high-efficiency furnaces and smart thermostats, often in the $200-$500 range. We’ll flag eligible units during your estimate, but it’s worth checking the CPS site yourself so you walk in informed.
- Consider timing. If your furnace still runs and you can schedule replacement in spring or early fall, you may get better scheduling flexibility and sometimes better pricing than during the December-through-February rush.
- Don’t oversize. A furnace that’s too big for your home cycles on and off constantly, wears out faster, and costs more upfront. We size based on actual load calculations. Some contractors quote a size up because it’s easier. Insist on a load calculation, not a “bigger is better” pitch.
- Ask about manufacturer rebates. Brands run seasonal promotions, especially in fall. Trane and Carrier often have $200-$500 cash-back offers or extended warranties during October and November. Ask your estimator what’s active this month.
- Don’t skip the free estimate. A written, line-item quote costs you nothing. Call (903) 623-6784 and we’ll send a technician to your San Antonio home, measure everything, and hand you a written price with no obligation. That number is locked. It won’t change at the door.
Furnace Replacement vs Repair: Which Makes Sense?
The honest math: if your furnace is under 12 years old and the repair is under $700, repair usually wins. If your furnace is 15+ years old and the repair quote is over $900, replacement is usually the smarter money. Here’s the breakdown for San Antonio’s gas furnaces.
Furnace repair in San Antonio typically runs $150 to $700 depending on the part. A failed ignitor might cost $180 to replace. A dead blower motor runs $450 to $700. A cracked heat exchanger, which is a safety issue, often costs $1,500 to $3,000 to replace, which is more than half the cost of a new mid-efficiency furnace.
Age matters because of the efficiency gap. A furnace installed in 2010 probably runs at 80% AFUE. A new 95%+ unit uses significantly less gas, which cuts your winter utility bill. If you’re already facing a $1,000+ repair on a 15-year-old furnace, replacing now means you avoid another repair next year and start saving on gas immediately. Our estimators will show you both options with real numbers and let you decide, no pressure.
How the Replacement Process Works
Here’s exactly what happens when you book a furnace replacement with Halden Heating and Air in San Antonio, step by step. No phone tag, no four-hour windows, no surprises.
- Book your free estimate online or by phone. Call (903) 623-6784 or book through our site. A live person answers, 24/7. You’ll pick a time that works for you.
- Get a live arrival time. We send you a tracking link so you can watch your technician drive to your home. Not a window. A time, tracked to the door.
- Walkthrough and load calculation. The technician inspects your current furnace, measures your home, evaluates ductwork, and answers your questions. This takes 45-90 minutes depending on access.
- Written quote with line items. On the spot, you get a written price covering the furnace unit, installation labor, permit, disposal, and any ductwork work. That price is locked before any work begins.
- Replacement day. Most San Antonio furnace replacements take 4 to 8 hours. The crew removes your old unit, installs the new furnace, connects gas and venting, tests everything, and starts it up. They’ll walk you through the new thermostat and show before-and-after photos.
- Written guarantee and the 365-Day Done Right Promise. Every replacement includes our written guarantee. If anything isn’t done right, we make it right, covered for a full year. No arguing, no fine print.
If you’re replacing a furnace now, learn more about our Furnace Replacement in San Antonio service, including what brands we install and how we handle attic and closet units.
FAQs – Furnace Replacement Cost
How much does a furnace replacement cost in San Antonio in 2026?
Most San Antonio homeowners pay between $4,200 and $8,900 for a complete furnace replacement. The median sits around $5,800 for a mid-efficiency unit with standard installation. Your specific price depends on furnace size, efficiency rating, brand, and whether ductwork modifications are needed. Call (903) 623-6784 for a free, written, line-item estimate on your exact home.
Is it cheaper to repair or replace a furnace?
If the repair is under $700 and your furnace is under 12 years old, repair is usually cheaper. If the repair exceeds $900 on a furnace that’s 15+ years old, replacement typically makes more financial sense, especially when you factor in the efficiency savings from a new 95%+ AFUE unit. We’ll show you both options with real numbers during your free estimate.
How long does furnace replacement take in San Antonio?
Most furnace replacements finish in 4 to 8 hours, with the majority done same-day. Attic installations and jobs requiring ductwork modifications can push toward the longer end. You’ll know the complete timeline during the estimate, and we’ll show up with a live arrival time you can track to your door.
What size furnace do I need for my San Antonio home?
A 1,200-1,500 square foot home typically needs a 40,000-60,000 BTU furnace. A 2,000-2,400 square foot home needs 60,000-80,000 BTU. Homes over 3,000 square feet often need 100,000 BTU or more. The only way to know for sure is a load calculation based on your home’s insulation, windows, and layout, which we do free during your estimate.
Does CPS Energy offer rebates for furnace replacement?
Yes. CPS Energy periodically offers rebates on high-efficiency furnaces, typically $200 to $500 depending on the unit’s efficiency rating. Smart thermostats often qualify for additional rebates of $50 to $150. Ask your estimator what’s active this month, or check the CPS Energy site before you buy.
Can you replace a furnace in one day?
Yes, in most cases. A straightforward furnace swap in a standard San Antonio home takes 4 to 8 hours and we complete the majority of replacements same-day. If your job requires ductwork modification or unusual venting, we’ll tell you upfront during the estimate so you can plan accordingly.
Why San Antonio Homeowners Choose Halden Heating and Air
Founded in 2004, Halden Heating and Air is independently owned and operated, part of the Relay Home Co. network of local HVAC businesses. Andre Fuller leads our San Antonio team, and every job runs on The Relay Standard: book online, get a live arrival time, see a written price before any work starts, and hold us accountable under The Relay Visibility Guarantee.
What that means for your furnace replacement: a background-checked, uniformed technician shows up when we say they will, measures your home properly, and hands you a written quote with every line item visible. No door-step surprises. No vague hand-wave pricing. If something isn’t right, our 365-Day Done Right Promise covers it, and if a repair we make fails, the return visit is free, automatically, because the written guarantee says so.
We service and install Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We’ll help you pick the right unit for your budget and your home’s heating needs, then install it cleanly and test it thoroughly before we leave.
Ready for a real number? Call us at (903) 623-6784 for a free furnace replacement estimate in San Antonio. A live person answers, day or night. We’ll get you on the schedule, send a technician with a live arrival time you can track, and put your price in writing before a single tool is picked up. Or start with our home page to see everything we do across San Antonio.
Pricing reflects the San Antonio market as of 2026. Halden Heating and Air San Antonio offers free estimates – call (903) 623-6784.
Written by Andre Fuller, Owner at Halden Heating and Air San Antonio, serving the San Antonio area since 2004.
What Our Customers Say
"Maintenance reminders come by text. I never have to remember."
- Elliot K."Furnace ignitor replaced. Paid online, no paperwork."
- Ivy R."Good work. Arrival was later than the first estimate, but the tracker updated live."
- Brad H.