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How Much Does Furnace Replacement Cost in Houston?

A full furnace replacement in Houston typically runs between $3,800 and $7,600 for a standard single-family home, with most homeowners landing right around $4,900 for a mid-efficiency unit installed. High-efficiency models (95%+ AFUE) push that range to $6,000 – $9,200, and that price includes the new furnace, removal of the old unit, and labor. Houston’s mild winters mean many homes run 60,000 – 80,000 BTU furnaces, which keeps our market slightly below the national average.

If you’re staring at a dead furnace in January, you probably want a firmer number than that. The truth is, the final figure depends on your home’s size, the efficiency tier you pick, and whether any ductwork or gas-line work is needed. We’ll walk through every line item below so you know exactly what you’re paying for before you sign anything.

Before we get into the numbers, you should know what you’re getting with us. We’re Cold Harbour Heating and Air Houston, founded in 2003 and independently owned and operated as part of the Kingswell network. Victor Mancini leads our team, and every replacement comes with a written price handed to you before a single tool comes out of the truck. No surprises at the door. That’s been our way for more than two decades.

If you’d rather skip the reading and just get a straight answer about your specific house, call us at (832) 371-9862. The estimate is free, and a live person answers the phone. If you want the full breakdown first, keep reading.

Furnace Replacement Cost Breakdown (2026)

Here’s what a furnace replacement actually costs in Houston, line by line. We’ve pulled these numbers from jobs our team has priced across the metro area over the past year, from Katy to Clear Lake to The Woodlands.

Add it all up and you’re looking at:

• Budget replacement (80% AFUE, no extras): $3,800 – $4,800
• Mid-range replacement (96% AFUE, two-stage): $4,800 – $6,200
• Premium replacement (modulating, new thermostat, duct adapter): $6,800 – $9,200

One thing worth saying plainly: you don’t necessarily need a 96%+ furnace in Houston. Our winters are short. A standard 80% unit will keep your house warm and costs thousands less up front. Where high efficiency pays off is summer humidity control, because two-stage and modulating furnaces often pair with better blowers that help your AC dehumidify. If you’re replacing the furnace and keeping your existing AC, we’ll tell you honestly whether the upgrade is worth it for your setup. That’s what home comfort should feel like: a straight answer, not an upsell.

What Affects Furnace Replacement Pricing in Houston

Here are the six factors that move your furnace replacement quote up or down, specific to the Houston market:

• Home size and BTU rating. A 1,500-square-foot home in Montrose might need a 60,000 BTU furnace, while a 3,000-square-foot house in Sugar Land could need 100,000 BTUs. Bigger unit, bigger price. Simple as that.
• Efficiency tier (AFUE). Standard 80% AFUE furnaces are the most common replacement in Houston and the cheapest. Jumping to 96% or 97% adds $1,500 – $3,000 to the equipment cost, which you may or may not recoup in gas savings depending on how long you stay in the home.
• Installation complexity. If your furnace sits in a tight attic in an older Heights bungalow, the labor takes longer than a wide-open garage closet in a newer Katy build. Attic access in Houston summers is brutal, and jobs in July and August often run toward the higher end of labor estimates.
• Gas line and venting. Older homes in neighborhoods like Timbergrove or Braeswood sometimes have undersized gas lines or outdated venting that no longer meets current code. Bringing those up to standard adds $200 – $600 to the job.
• Permit requirements. The City of Houston requires a mechanical permit for furnace replacement, and inspections happen after installation. This is non-negotiable and included in our quotes, but some lower-priced competitors skip permits to undercut bids. If a quote looks suspiciously cheap, ask whether a permit is included.
• Seasonal demand. Houston doesn’t have a deep freeze season like Minneapolis, but when a cold snap hits in January, demand spikes and labor availability tightens. Prices stay consistent with us because we quote the same way every day, but scheduling flexibility matters. A replacement in October is easier to book than one during the first cold front.

Furnace Replacement in Houston: What the Process Looks Like

If you’re weighing whether to go with us for your Furnace Replacement in Houston, here’s how the job goes from first phone call to final walkthrough:

1. You call (832) 371-9862. A live person answers. Not a phone tree. Not a voicemail that gets returned tomorrow. You tell us what’s going on with your furnace, and we schedule a visit at a time that works for you.
2. We show up in the window we gave you. Our technicians are background-checked, uniformed, and they’ll tell you their name when they arrive. You’ll know exactly who’s in your home.
3. We assess your current system. The tech looks at your furnace, checks your duct connections, measures your home, and asks about any cold spots or comfort issues you’ve noticed. This is where we figure out the right BTU size and whether your existing gas line and venting can handle a new unit.
4. You get a written price. Before any work begins, we hand you a line-by-line quote. The number on that paper is the number you pay. It doesn’t change at the door. That’s part of The Kingswell Way: say the price before the work, keep it firm, and put it in writing.
5. We do the job, clean up, and walk you through it. Installation typically takes 4 – 8 hours depending on access and complexity. When we’re done, we leave the space cleaner than we found it and show you how to use the new thermostat.
6. Your repair guarantee is on paper. This matters: every repair we make carries a 365-Day Done Right Promise. If something fails within that year, we come back and fix it at no charge. That’s not a verbal promise. That’s written down before we leave.

How to Save on Furnace Replacement

There are real, legitimate ways to keep your furnace replacement cost down in Houston without cutting corners on safety or quality. Here’s what we tell our own friends and family:

• Replace before it dies. This sounds counterintuitive, but it’s the biggest money-saver. If your furnace is 15+ years old and blowing cold air or making unusual noises, replacing it on your schedule means you can compare options calmly. Emergency replacements in the middle of a January cold snap cost more because you’re limited on time. You don’t have that leverage when your family is shivering.
• Don’t overbuy efficiency you won’t recoup. In Houston’s climate, an 80% AFUE furnace does the job for most homes. Gas here is relatively inexpensive compared to northern states, and the payback period for a jump to 96% can stretch past 10 years. If you’re planning to stay in the home long-term and your AC is also aging, the higher-efficiency unit might make sense. If you’re likely to move in five years, save the money.
• Size the unit correctly. Oversized furnaces cost more up front and actually perform worse, cycling on and off too quickly and failing to remove humidity. A properly sized unit uses less gas and lasts longer. This is where a real assessment matters, not a phone quote based on square footage alone.
• Bundle with AC replacement. If both your furnace and air conditioner are 15+ years old, replacing them together often saves $500 – $1,000 versus doing them separately later. The labor overlaps, the adapter work happens once, and you get a matched system that runs more efficiently.
• Ask about available rebates. CenterPoint Energy periodically offers rebates on high-efficiency furnace installations, and some manufacturers run seasonal promotions. Rebates change frequently, so ask us what’s current when you call. We’ll tell you straight if there’s money on the table.

And the simplest way to know what you’ll actually pay: call us at (832) 371-9862 and get a free estimate. We’ll come out, look at your system, and hand you a written number. If you decide not to move forward, you’ve lost nothing.

Is It Cheaper to Replace or Repair a Furnace in Houston?

Here’s the rule of thumb we share with every Houston homeowner facing this decision: if the repair costs less than 30% of a replacement and your furnace is under 12 years old, repair it. If the repair pushes past 50% of replacement cost or your furnace is over 15 years old, replace it.

Furnace repairs in Houston run $150 – $700 for most issues. A failed igniter might be $200. A bad control board could be $450 – $650. A cracked heat exchanger, though, is a different story. That’s a safety issue, not just a comfort one, and in most cases, replacing the heat exchanger costs close to what a new furnace would cost once you factor in labor. At that point, replacement is the smarter financial move.

Here’s the math laid out plainly:

• Furnace is 8 years old, repair is $250. Fix it. You’ve got plenty of life left in that unit.
• Furnace is 14 years old, repair is $600. Borderline. We’d show you both options and let you decide with full information.
• Furnace is 18 years old, repair is $800+. Replace it. You’re putting good money into a unit that’s already past its expected service life.

One more thing: if we make a repair and it fails within 365 days, we come back and fix it at no charge. That’s our 365-Day Done Right Promise, and it’s written down on every repair ticket. So when we tell you a repair is worth doing, we’re backing that recommendation with a year-long guarantee.

FAQs – Furnace Replacement Cost

How much does a furnace replacement cost in Houston, TX?

A furnace replacement in Houston typically costs $3,800 – $7,600 for a standard installation, depending on the unit’s efficiency and your home’s size. High-efficiency models run $6,000 – $9,200. Call (832) 371-9862 for a free, written estimate specific to your home.

Can you replace a furnace the same day in Houston?

In many cases, yes. If you call us by mid-morning on a weekday, we can often get a team out the same day or first thing the next morning, even during Houston’s cold snaps. We answer the phone 24/7 with a live person, so call (832) 371-9862 and we’ll tell you exactly when we can be there.

How long does a furnace replacement take?

Most furnace replacements take 4 – 8 hours from arrival to final walkthrough. Jobs with tight attic access, gas line modifications, or duct adapter work run toward the longer end. We’ll give you a specific time window when we schedule the job, and we show up in that window.

What size furnace does my Houston home need?

Most Houston homes need a 60,000 – 80,000 BTU furnace, though larger homes in places like Katy or Pearland may need 100,000 BTUs. Sizing depends on square footage, ceiling height, insulation, and window type. We measure all of that during a free estimate so you don’t end up with an oversized unit that cycles on and off inefficiently.

Does Houston require a permit for furnace replacement?

Yes. The City of Houston requires a mechanical permit for gas furnace replacement, and a post-installation inspection is part of the process. Our quotes always include the permit and inspection fee, which runs $150 – $350. If a quote from another company doesn’t mention a permit, ask. Skipping permits can cause problems if you ever sell the home.

Is a 96% efficiency furnace worth the extra cost in Houston?

In most Houston homes, honestly, no. Our winters are mild and gas prices are relatively low, so the payback period on a 96% vs. 80% unit often stretches past a decade. The better reason to consider a higher-end furnace is the blower technology that improves summer humidity control when paired with your AC. We’ll walk you through both options and give you a straight recommendation, not a pitch.

Why Homeowners in Houston Choose Cold Harbour Heating and Air

We’re not the biggest HVAC company in Houston, and we don’t want to be. What we are is the company that puts everything in writing. Victor Mancini has run our team since 2003, and the standards we operate under come from the Kingswell network: independently owned and operated businesses that follow the same written rules. A cold harbour, if you’re curious, was a roadside shelter where travelers waited out bad weather. That’s the name’s origin story, and it fits the work: comfort in any season.

Here’s what you get with every furnace replacement we do:

• A written price before work begins. Not an estimate scrawled on a notepad. Not a price that changes when we arrive. A line-by-line written quote, handed to you, that we honor to the dollar.
• A firm arrival window. We tell you when we’ll be there, and we’re there. Your time matters as much as ours.
• Background-checked, uniformed technicians. You’ll know who’s walking through your door, and you’ll never wonder if the person in your attic is someone we’d vouch for.
• A clean job site. We lay down drop cloths, clean up after ourselves, and leave your home the way we found it. Cleaner, actually. That’s a Kingswell Way standard: leave the place cleaner than found.
• A written 365-Day Done Right Promise. Every repair carries a guarantee valid for one full year. If it fails, we return and correct the work at no charge. Written. Not verbal.

Our technicians are trained to service nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. So whatever system is already in your home, the technician who shows up can work on it. You won’t hear us say we need to wait for a “specialist” or reschedule.

Get Your Free Furnace Replacement Estimate in Houston

You don’t have to figure out furnace replacement costs on your own, and you shouldn’t have to guess. Call us at (832) 371-9862 and we’ll schedule a time to come out, assess your current system, and hand you a written quote. The estimate is free. The number won’t change at the door. And if you decide to move forward, the guarantee is on paper before we leave.

A live person answers the phone 24 hours a day, 7 days a week. That includes weekends and holidays. No phone trees. No waiting until morning. Just a straight answer about what your furnace replacement will cost and when we can get it done.

Pricing reflects the Houston market as of 2026. Cold Harbour Heating and Air Houston offers free estimates – call (832) 371-9862.

Written by Victor Mancini, Owner at Cold Harbour Heating and Air Houston, serving the Houston metro since 2003.