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AfterFurnace Replacement in San Antonio, TX
Furnace replacement in San Antonio typically costs between $3,800 and $8,200 depending on the size of your home, the efficiency rating you choose, and how much ductwork modification is needed. Most replacements take one full day, and at Halden Heating and Air San Antonio we put the written price in your hand before a single tool comes off the truck. If your furnace is older than 15 years, needs a repair over $900, or has a cracked heat exchanger, replacement is usually the smarter financial call. Call (903) 623-6784 and we’ll walk you through what makes sense for your house.
We’re part of the broader Heating & Furnace in San Antonio service line here at Halden, and furnace replacement is the job where getting the details right matters most. A furnace that’s sized wrong, vented wrong, or installed with sloppy duct connections will cost you every single winter. We see it in neighborhoods across the city: Leon Valley, Alamo Heights, Stone Oak, Helotes, and inside Loop 410, where older homes often have furnaces that were oversized from day one. That’s not a small problem. It means short cycling, cold spots, and gas bills that don’t match the comfort level you’re getting.
Andre Fuller, owner at Halden Heating and Air San Antonio, built this company on a straightforward promise: you get a written price before work starts, a written guarantee on the job, and a live person on the phone no matter when you call. That’s The Relay Standard we operate under as part of the Relay Home Co. network. It’s not a slogan. It’s how the job gets booked, priced, and finished.
When You Need Furnace Replacement
Not every furnace problem means replacement. Sometimes it’s a $200 ignitor or a $350 blower motor and you’re back in business. But some situations don’t justify another repair. Here’s what pushes San Antonio homeowners toward replacement, based on what we actually see in the field:
- Age over 15 years. Even well-maintained furnaces lose efficiency and reliability after a decade and a half. The heat exchanger, the blower, the control board: they’ve all got wear. In San Antonio, furnaces don’t run as many hours as furnaces up north, but the humid air and occasional hard freeze still take a toll. If your furnace was installed before 2010, you’re on borrowed time.
- Heat exchanger crack or rust-through. This is the one that ends the conversation. A cracked heat exchanger can leak carbon monoxide into your home, and it’s never a repair we recommend on an older unit. If we find it, we’ll show you photos and shut the furnace down until it’s replaced. No scare tactics, just facts.
- Repair quote over $900 on an older unit. Here’s the math we tell every homeowner: if the furnace is 12 years old and the repair is 40% of the cost of a new system, replacement usually wins. You get a new warranty, better efficiency, and no rolling the dice on the next failure.
- Rooms that never heat evenly. This can mean the furnace is the wrong size for your home. San Antonio houses built in the 1980s and 1990s often have furnaces that are one size too large or too small, because the original builder spec’d them without accounting for window orientation, ceiling height, or later additions. A properly sized replacement fixes this.
- Rising gas bills without a comfort change. If your bill keeps climbing and your thermostat setting hasn’t moved, your furnace is working harder than it should. Efficiency drops as components age, especially the burners and the heat exchanger. A new high-efficiency unit cuts gas use noticeably.
- Constant repairs, multiple trips per year. Two repairs in one winter is a signal. Three is a pattern. At some point you’re paying to keep a dying system alive, and it’s cheaper to put that money toward a replacement with a real warranty.
Our Furnace Replacement Process
You should know exactly what happens from the first phone call to the final walkthrough. Here’s the sequence, and it’s the same for every furnace replacement we do in San Antonio:
- Call or book online, get a live arrival time. When you call (903) 623-6784, a real person answers. No phone tree. You’ll get a live arrival time you can track to your door, not a four-hour window. That’s part of The Relay Visibility Guarantee, and we’ve been doing it this way since 2004.
- Andre or one of our background-checked technicians walks the whole system. We check the furnace itself, the ductwork connections, the thermostat wiring, the venting, and the gas line. We measure the square footage of the heated area and look at your windows, insulation, and ceiling height. A correct furnace size comes from math, not guesswork.
- You get a written price before any work starts. This is non-negotiable at Halden. The quote includes the furnace, the labor, any duct adapters or venting changes, the new thermostat if needed, removal of the old unit, and cleanup. What you see is what you pay. We don’t discover a “problem” halfway through that doubles the bill.
- We install and test the furnace the same day in most cases. The old furnace comes out, the new one goes in, and we run the full startup sequence: burner ignition, blower airflow, temperature rise, carbon monoxide check, and gas leak test. We photograph everything before and after so you can see the work that was done, not just hear about it.
- You get a written guarantee and the 365-Day Done Right Promise. Every furnace replacement at Halden Heating and Air San Antonio includes a written guarantee. If anything isn’t right within a year of the install, we come back and make it right. And if a covered repair on the new furnace fails during the warranty period, the return visit costs you nothing.
Furnace Replacement Pricing in San Antonio
Furnace replacement in San Antonio runs from about $3,800 for a basic 80% efficiency unit in a smaller home up to $8,200 or more for a high-efficiency, variable-speed system in a larger house. Most of our replacements land between $4,500 and $6,500. The gap comes down to a few things: the size of your home in square feet, the efficiency rating of the furnace, whether you need a new thermostat, and how much venting or duct adaptation the install requires.
Here’s how the pricing breaks down by line item, so you can see where the money goes:
- Furnace unit (80% efficiency, 60,000 – 100,000 BTU): $1,800 – $3,200. This is the most common range for San Antonio homes up to about 2,200 square feet. Brands we frequently install include Rheem, York, and Bryant, and we’re certified to service the major lines.
- Furnace unit (90%+ efficiency, condensing): $2,800 – $5,000. Higher upfront cost, lower gas bills. Condensing furnaces also need a condensate drain line, which adds a bit to labor.
- Labor and installation: $1,200 – $2,400. This includes removal and disposal of the old furnace, fitting the new unit, gas line connection, venting adjustments, and full startup testing.
- Thermostat (if needed): $120 – $350. Smart thermostats are on the higher end and sync with your phone, which fits the way most of our San Antonio customers want to run their homes.
- Duct or venting modifications: $200 – $900. Older homes in areas like Jefferson or Beacon Hill sometimes need a flue liner update or a duct adapter when moving from an older-style furnace to a new sealed-combustion unit.
Those numbers are honest ranges we see every week, not teaser prices designed to get a tech in the door. Every quote is fixed and written, and it comes with the 365-Day Done Right Promise. Want an exact number for your house? Call (903) 623-6784 and we’ll send a technician with a live arrival time. The estimate is free. The price you get is the price you pay.
FAQs – Furnace Replacement
How much does furnace replacement cost in San Antonio?
Furnace replacement in San Antonio costs between $3,800 and $8,200, with most jobs landing between $4,500 and $6,500. The exact price depends on your home’s square footage, the furnace efficiency rating, and how much duct or venting work the install requires. Halden Heating and Air San Antonio gives every customer a written price before work starts, so the quote you approve is the amount you pay. Call (903) 623-6784 for a free estimate with a live arrival time.
Is it cheaper to repair or replace my furnace?
As a rule of thumb: if the repair costs more than 40% of the replacement price and the furnace is over 12 years old, replacement wins. A furnace that age has more failures coming, and a new unit carries a fresh warranty and better efficiency. We’ll show you the math both ways and let you decide. Halden Heating and Air San Antonio never pushes a replacement when a repair genuinely makes sense, and our written guarantee applies either way.
Can you replace my furnace the same day?
In most cases, yes. We keep common furnace sizes from Rheem, York, Bryant, and other major brands stocked in our San Antonio warehouse, which means we can often complete the full replacement the same day we inspect the job. When you call (903) 623-6784, tell us your address and square footage and we’ll bring inventory that fits your home. You’ll get a written price on the spot, and if there’s a safety issue like a cracked heat exchanger, we’ll make the replacement the priority.
What furnace brands do you install and service?
We install Rheem, York, Bryant, and Daikin furnaces and are certified to service Carrier, Trane, Lennox, Goodman, and American Standard as well. The brand matters less than the install quality. A mid-range furnace installed with correct sizing, proper venting, and sealed duct connections will outperform a premium unit that was slapped in. That’s why every Halden Heating and Air San Antonio furnace replacement includes a full startup test, before-and-after photos, and the 365-Day Done Right Promise in writing.
Do you charge for a furnace replacement estimate?
No. Furnace replacement estimates are free. You’ll get a written, line-item price before you approve anything, and that price doesn’t change at the door. Halden Heating and Air San Antonio is part of the Relay Home Co. network, and we operate under The Relay Standard: live arrival times, written pricing, and a guarantee on every job. Call (903) 623-6784 to book your estimate.
If you’re still trying to decide between repair and replacement, call us. We’ll give you the honest math, a written price, and the information you need to make the call without pressure. That’s how we’ve done furnace replacement in San Antonio since 2004, and it’s how Andre Fuller runs Halden Heating and Air San Antonio today. Call (903) 623-6784 and we’ll be there with a live arrival time you can track.
Written by Andre Fuller, Owner at Halden Heating and Air San Antonio, serving San Antonio.