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AfterHow Much Does Furnace Replacement Cost in San Antonio?
Furnace replacement in San Antonio typically costs between $3,800 and $7,200 for a standard single-family home, with most homeowners landing around $5,200. The final number depends on furnace efficiency, brand, home size, and whether existing ductwork needs modification. A high-efficiency unit in a larger home can push toward $8,500 or more.
San Antonio’s mild winters mean furnaces here often last longer than they do in northern climates, but when a replacement is needed, the job should be done right. At home, we walk through the numbers with you before any work begins, so you know exactly what you’re paying and why.
Key Takeaways
- Most San Antonio furnace replacements run $3,800 – $7,200 installed.
- Replacing an 80% AFUE furnace with a 96% high-efficiency model usually adds $1,200 – $2,400 to the total.
- Labor for a furnace replacement in San Antonio typically accounts for $1,400 – $2,800 of the final cost.
- The most common replacement we do in San Antonio is an 80% AFUE furnace in a 1,800 – 2,400 sq ft home, running $4,200 – $5,900.
- A written price before any work starts is standard practice at Meadowsweet Heating & Air, not an add-on.
Furnace Replacement Cost Breakdown (2026)
Here’s what a furnace replacement in San Antonio looks like line by line. These ranges reflect the local market as of 2026 and the pricing we see across neighborhoods like Alamo Heights, Stone Oak, Leon Valley, and Converse.
| Cost Component | Typical Range in San Antonio |
|---|---|
| Furnace unit (80% AFUE, 60,000 – 80,000 BTU) | $1,800 – $2,800 |
| Furnace unit (96% AFUE, high-efficiency) | $2,800 – $4,200 |
| Installation labor | $1,400 – $2,800 |
| Ductwork modifications (if needed) | $400 – $1,600 |
| Thermostat replacement or upgrade | $80 – $300 |
| Permit and inspection (City of San Antonio) | $60 – $180 |
| Removal and disposal of old furnace | $120 – $300 |
| Gas line modification (if needed) | $200 – $650 |
What drives cost up or down in San Antonio specifically? Home age is a big one. In older neighborhoods like Monte Vista or Beacon Hill, furnaces from the 1980s and 1990s often need flue pipe updates or gas valve replacements to meet current code. That adds a few hundred dollars. In newer construction across far northwest San Antonio near Bandera Road, installs tend to be more straightforward because the mechanical rooms were built with modern clearance and venting standards.
A note on efficiency: San Antonio sees maybe 15 to 20 nights per year where the furnace actually works hard. An 80% AFUE unit is the budget-friendly standard and still passes code here. A 96% unit costs more upfront but trims gas bills and qualifies for CPS Energy rebates, which we can help you process.
What Affects Furnace Replacement Pricing in San Antonio
Not all furnace replacements cost the same, even on the same street. Here are the variables that move the number in San Antonio more than anything else.
- Furnace size (BTU output). A 1,200 sq ft home in Jefferson needs a 45,000 – 60,000 BTU furnace. A 3,200 sq ft home in Rogers Ranch needs 100,000 BTU or more. Bigger units cost more to buy and slightly more to install.
- Efficiency rating. The gap between an 80% AFUE and a 96% AFUE furnace in San Antonio is usually $1,200 – $2,400 installed. Both are legal here. The payoff for high efficiency depends on how much you run the heat, which in this climate is modest.
- Vent type. High-efficiency furnaces need PVC venting. If your current furnace vents through a metal flue into a chimney, the installer will need to run new PVC lines. In ranch-style homes common across the north side, this is usually a two-hour job. In two-story homes or those with finished basements (rare but present in some Hill Country builds), it costs more.
- Ductwork condition. Homes in San Antonio neighborhoods built before 1985 often have undersized returns or leaking duct seams. The furnace itself is only part of the system. If the ducts are constricted, a new furnace will short-cycle, waste energy, and fail early. We’ll tell you if ductwork needs work before quoting the furnace alone.
- Access and clearance. In many San Antonio homes, the furnace sits in a hall closet or attic. Attic installs in summer are brutal and take longer, which can add $200 – $400 in labor. Closet installs with tight clearances sometimes require a smaller cabinet size or a side-return modification.
- Equipment brand. We service and install nine brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. Goodman and Rheem tend to land on the lower end of the price scale. Carrier, Trane, and Lennox run mid-to-high. Bryant and American Standard sit in the middle. We’ll show you price differences honestly without pushing the most expensive option.
San Antonio-Specific Cost Drivers
Two things come up more often in San Antonio than in most Texas cities. First, CPS Energy periodically updates its rebate tiers for high-efficiency gas furnaces, and the rebate amount changes what a 96% unit actually costs out of pocket. Second, because San Antonio temperatures swing quickly, many homes here run a furnace and an AC that share the same blower and cabinet. If your setup is a matched system, replacing just the furnace sometimes requires a coil adaptor or a blower-motor compatibility check, which can add $150 – $400.
Luis Serrano, owner at Meadowsweet Heating & Air San Antonio, notes that most San Antonio homeowners tend to ask the same question: “Can I replace just the furnace without touching the AC?” The answer is usually yes, and that’s a good cost-control decision if the AC is less than 8 years old.
How to Save on Furnace Replacement
You don’t need to cut corners to keep a furnace replacement affordable. The right moves reduce cost without reducing quality.
- Time the replacement for early fall or late spring. San Antonio HVAC crews are busiest in July and August for AC work and in December and January for furnace work. Booking a replacement in October or March often gets you faster scheduling and sometimes better pricing on the furnace itself as distributors run shoulder-season promotions.
- Right-size the furnace, not upsize. Some contractors quote a bigger furnace than the house needs because the unit costs more and they make more margin. A furnace that’s too large short-cycles, which costs more to run and wears out the heat exchanger sooner. Insist on a load calculation. A proper Manual J for a San Antonio home should account for our mild winters, not a Minneapolis-style design load.
- Keep your existing AC if it’s still cooling well. A furnace replacement doesn’t require replacing the air conditioner. If your AC is under 10 years old and running fine, you can save thousands by doing the furnace alone.
- Check for CPS Energy rebates. San Antonio’s municipal utility has offered rebates for high-efficiency gas furnaces in recent years. The amounts change, so it’s worth asking. We can confirm current rebate tiers during the estimate.
- Get a written price before any work starts. This is the single best way to avoid surprise costs. At Meadowsweet, a written price is not a negotiation tactic – it’s standard on every job, every time. You’ll see the cost for equipment, labor, disposal, and permit before you approve anything.
If you’re in the research phase and not sure what a furnace replacement machine should cost for your specific home, call us at (254) 271-2545. Estimates are free, and there’s no pressure to book. We’ll measure the house, look at the existing setup, and give you a real number you can plan around.
Signs Your Furnace Needs Replacement vs. Repair
Before spending on a full replacement, it’s worth knowing what points toward replace versus repair. In San Antonio’s climate, a furnace that runs only a few hundred hours per year can last 18 to 25 years, so age alone isn’t the trigger.
Repair Usually Makes Sense When:
- The furnace is under 12 years old and the repair is under $400.
- The problem is a failed ignitor, flame sensor, pressure switch, or capacitor – common, inexpensive parts.
- The heat exchanger is confirmed intact by a visual inspection and combustion test.
Replacement Usually Makes Sense When:
- The furnace is 18 years old or older and needs a repair over $700.
- The heat exchanger is cracked or has visible rust-through. This is a safety issue, and in some cases the repair cost approaches 60 – 70% of replacement.
- The furnace is a standing-pilot model from before 1992 and is no longer efficient by any modern standard.
- You’ve called for furnace repair twice in the same winter and the unit is still unreliable.
Our Furnace Replacement in San Antonio page goes deeper into the replace-versus-repair decision and what the replacement process looks like inside your home.
What the Replacement Process Looks Like With Meadowsweet
If you decide to move forward, here’s exactly what happens, step by step. This is the process we follow on every furnace replacement in San Antonio, from a single-story ranch in Thousand Oaks to a two-story in Cibolo Canyons.
- Phone call and home visit. You call (254) 271-2545. A live person answers, day or night. We schedule a time that works for your household, including evenings and weekends. No voicemail queue, ever.
- Measurement and assessment. We look at the existing furnace, measure the home, count the supply and return registers, and check ductwork condition. This is also when we note the floors, hallways, and any areas where kids’ toys or pet beds sit in the work path – because those are exactly the things we protect during the job.
- Written price. Before any work starts, you get a written price covering the furnace, labor, thermostat (if needed), permit, removal, and any required modifications to venting or gas line. There’s no “we’ll see when we get in there” add-on later. The price you approve is the price you pay.
- Installation day. A background-checked, uniformed technician arrives at the scheduled time. Shoe covers go on before entering, and drop cloths go down from the entry door to the furnace location. The crew follows the C.A.R.E. values code: Clean up like it’s their own home, Ask before moving anything, Respect the family’s time and quiet hours, Explain the price before the work. Quiet hours mean if your kids are napping or studying, we minimize noise and don’t blast music or shout across the house.
- System startup and safety check. After installation, we run a full startup sequence, check gas pressure at the manifold, test the heat exchanger temperature rise, and confirm carbon monoxide levels are zero at every register. High-tension and gas-related work is done only by trained professionals – furnace gas lines and venting are not DIY territory, and we take that seriously.
- Cleanup and photo proof. Before the crew leaves, the work area is swept, wiped down, and returned to the same condition it was in at arrival. We take a photo of the clean-up and send it to you. This happens on every job, not as an extra service.
- 365-Day Done Right Promise. Every furnace replacement is covered by the Cedarwell Care Promise, which includes a 365-day guarantee: if it’s not done right, Meadowsweet makes it right. No fine print, no back-and-forth.
Meadowsweet Heating & Air is an independently owned and operated location within the Cedarwell family of HVAC companies, founded in 2004. The Cedarwell Care Promise – written pricing, clean work, real accountability – is the operating standard, not a marketing line.
FAQs – Furnace Replacement Cost
How much does a furnace replacement cost in San Antonio in 2026?
Most furnace replacements in San Antonio run $3,800 to $7,200 installed. A standard 80% AFUE furnace in a mid-sized home typically lands around $4,500 to $5,500. High-efficiency 96% units run $5,500 to $8,500 depending on home size and venting complexity. Call (254) 271-2545 for a written quote on your specific home – the estimate is free.
Is it cheaper to repair or replace a furnace in San Antonio?
Furnace repairs in San Antonio typically cost $150 to $700. If your furnace is under 12 years old and the repair is under $400, repair is usually the better financial call. If the unit is 18 years or older and the repair quote is over $700, replacement usually wins – and you avoid paying for a second repair six months later. We’ll give you an honest assessment either way, never a push toward the bigger sale.
How long does a furnace replacement take in San Antonio?
A standard furnace replacement takes 4 to 8 hours for most San Antonio homes. Straight swaps in newer subdivisions near Alamo Ranch are often done in half a day. Jobs that require new venting, gas line changes, or duct modifications can stretch to a full day or occasionally into a second day. We’ll tell you the expected timeline during the estimate.
Can I replace just the furnace and keep my existing AC?
Yes. In San Antonio, it’s very common to replace the furnace alone while keeping the existing air conditioner, especially if the AC is under 10 years old and cooling well. The one thing to confirm is whether your blower can be matched to the new furnace. In some systems, a coil adaptor or blower compatibility kit is needed, typically adding $150 to $400.
Does San Antonio require a permit for furnace replacement?
Yes. The City of San Antonio requires a mechanical permit for furnace replacement. The permit fee typically runs $60 to $180. A licensed contractor pulls the permit and schedules the inspection. Un-permitted work can flag problems when you sell the home, so this is not a corner worth cutting. We handle the permit as part of every replacement.
What’s the most common furnace size for a San Antonio home?
For most 1,800 to 2,400 sq ft San Antonio homes, the correct furnace size is 60,000 to 80,000 BTU. Some newer, tighter homes can be comfortable on 45,000 to 60,000 BTU. Proper sizing matters more than brand – a furnace that’s too big short-cycles and wears out the heat exchanger faster. We do a load calculation before recommending a unit.
Why San Antonio Homeowners Choose Meadowsweet Heating & Air
There are plenty of HVAC companies in San Antonio. Here’s why families in areas like Terrell Hills, Castle Hills, and Timberwood Park call Meadowsweet.
- Written price before any work starts. You’ll see the total cost of your furnace replacement before you approve anything. Every visit, every job, no exceptions.
- Floors stay clean. Shoe covers and drop cloths go down on every visit. We take a photo of the clean-up before we leave and send it to you. This is included on every job, not treated as an upsell.
- C.A.R.E. values code. Our technicians follow four rules on every visit: Clean up like it’s their own home, Ask before moving anything, Respect the family’s time and quiet hours, Explain the price before the work. It’s a system, not a personality trait.
- Nine brands, no brand bias. We’re qualified to service and install Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We’ll recommend what fits your home and budget, not what we happen to have excess stock of.
- 365-Day Done Right Promise. Every furnace replacement is covered for a full year under the Cedarwell Care Promise. If it’s not done right, we make it right. That promise is backed by the Cedarwell family of companies, established in 2004.
- A live person answers, 24/7. Nights, weekends, holidays – a real person picks up the phone. No voicemail tree, no “press 2 for service.” Call (254) 271-2545 and you’re talking to a human.
Get a Free Furnace Replacement Estimate in San Antonio
Replacing a furnace is a significant home investment, and you deserve to know the real number before you commit. Our team will come out, measure your home, inspect your current system and ductwork, and give you a written price on the spot – with no pressure and no obligation.
Call (254) 271-2545 to schedule your free estimate. Whether you’re in Alamo Heights, Stone Oak, Helotes, or anywhere else in the San Antonio metro, we’ll walk you through your options, show you the numbers, and let you decide. If it’s not done right, we make it right. That’s the deal.
Written by Luis Serrano, Owner at Meadowsweet Heating & Air San Antonio, serving San Antonio since 2004.
Pricing reflects the San Antonio market as of 2026. Meadowsweet Heating and Air San Antonio offers free estimates – call (254) 271-2545.
What Our Customers Say
"AC repair in July. The tech laid a mat down by the indoor unit and wore booties through the house. Fixed it fast and left zero mess. Quiet and kind, good with our nervous dog too."
- Delia Frost"Replaced a failing capacitor and cleaned the unit. What I noticed was how respectful he was of the house and how spotless he left the utility closet. Fair price too."
- Tomas Rivera"Good repair. It needed a second visit because the part wasn't on the truck, which was a little inconvenient. Both times the tech was careful and clean and kind though."
- Chad Boone