What Does Furnace Replacement Cost in Houston? What Drives the Price

Published October 16, 2026 · Reviewed October 16, 2026

Part of our Heating Installation & Replacement guides.

What does furnace replacement cost in Houston?

The installed cost of a new gas furnace in Houston depends on the furnace's efficiency tier, its size and blower type, the venting and gas-line work the installation needs, and whether the furnace has to be matched to a new or existing AC coil. In most Greater Houston homes the furnace sits in the attic and shares its blower and cabinet with the air conditioner, so a furnace quote is rarely just about the furnace.

This guide does not publish a price. A national figure cannot see your attic, your vent path or your gas line, and it can set the wrong expectation in either direction. Instead, it explains each factor that moves the price, which ones move it a little and which ones a lot, and what a complete written quote should include so you can compare offers fairly.

The honest answer to "what does a new furnace cost?" is: it depends on the efficiency tier, the venting and gas work, and how the furnace pairs with your AC, and the only reliable number is an itemized quote written after an on-site look.

Houston furnaces also live an unusual life. NOAA's 1991–2020 normals for Houston Intercontinental Airport show about 1,266 heating degree days a year against 3,288 cooling degree days, so a Houston furnace runs far fewer hours than one in a colder city. That affects which efficiency tier makes sense, as the sections below explain.

What drives the installed price of a new furnace?

Efficiency tier, venting changes, blower type and the AC coil pairing are the biggest drivers of an installed furnace price. The table below lists the common factors and how each one tends to affect a quote.

What drives the installed price of a gas furnace replacement in Greater Houston

Factor	What it means	Effect on the installed price
Efficiency tier (AFUE)	Standard-efficiency furnaces around 80% AFUE vs. high-efficiency condensing furnaces at 90% AFUE and above	A condensing furnace raises the equipment price
Venting	Metal flue for an 80% furnace; PVC venting for a condensing furnace	Reusing a sound existing flue is usually small; switching to a condensing furnace can raise it sharply if new PVC vent runs are needed
Condensate drain	A condensing furnace produces water that must be drained	Usually small if a drain is nearby; can raise it if a new drain route is needed
Furnace size (input)	Heating capacity, set by a load calculation for your home	Larger furnaces raise the price slightly; correct sizing can lower it
Blower and staging	Single-stage or two-stage burner; standard or variable-speed blower	Two-stage and variable-speed options raise the price
AC coil match	The indoor AC coil sits on the furnace and must fit and pair correctly	Usually small if the coil fits; a new coil or adapter raises it
Gas line	Connection, shutoff valve and any resizing of the gas supply	Usually small for a reconnection; rerouting or upsizing raises it
Attic access	How hard it is to reach the furnace location	Tight or hard-to-reach attics raise labor
Combustion safety checks	Venting, draft and carbon monoxide checks after installation	Usually small, and they should never be skipped
Ductwork and plenum	Transitions, sealing or replacement where the furnace connects	Minor transitions are usually small; duct replacement can raise it sharply
Thermostat	A control compatible with the furnace and AC staging	Usually small
Permit, removal	Mechanical permit where required; haul-away of the old furnace	Usually small, but each should be listed

Which furnace efficiency tier makes sense in Houston?

An 80% AFUE furnace is often the practical choice for a Houston attic, while a 90%-plus condensing furnace makes more sense when you want lower gas use and the venting and drain work are straightforward. AFUE, or annual fuel utilization efficiency, measures how much of the fuel a furnace burns becomes usable heat over a season; the U.S. Department of Energy describes high-efficiency condensing furnaces as having AFUE ratings of 90% and above.

Standard-efficiency (around 80% AFUE)

An 80% furnace vents through a metal flue, often reusing the existing vent path. In a Houston attic with a sound existing flue, that keeps installation work simpler. Because Houston furnaces run relatively few hours a year, the gas savings from a higher tier accumulate slowly.

High-efficiency condensing (90% AFUE and above)

A condensing furnace extracts more heat from its exhaust, which cools the exhaust enough that water condenses. It therefore needs PVC venting, usually run through a wall or roof, and a condensate drain. Those two requirements are what raise the installation cost. In an attic, the drain also needs a safe route and, typically, overflow protection. Whether the efficiency gain is worth it depends on your gas use and how easy the venting and drain are to run.

Furnace, or a heat pump instead?

Because Houston's heating load is light, a furnace replacement is a good moment to ask whether a heat pump would cover your heating with one system. Our comparison of a heat pump vs. an AC with a gas furnace in Houston covers the running-cost side.

Why do the AC coil and safety checks affect the quote?

The AC coil and the combustion safety checks affect the quote because a furnace that does not pair with its coil, or is not verified safe after installation, is not a finished job.

Matching the AC coil

In an AC + furnace system, the AC's indoor coil sits on top of the furnace and the furnace blower moves the cooled air. A new furnace must physically fit the coil and deliver the airflow the AC needs. If your AC is also aging, replacing both together keeps the system matched; our AC replacement cost guide covers the cooling side.

Gas line, venting and carbon monoxide

A gas furnace burns natural gas inside your home, so gas connections, venting and combustion are safety items, not extras. EPA lists leaking furnaces and chimneys among indoor sources of carbon monoxide, an odorless gas that can cause headaches, dizziness, confusion and nausea and can be fatal at high concentrations. A complete installation includes a gas leak check, a venting and draft check, and a combustion check. Gas and venting work requires a licensed professional. EPA cites the Consumer Product Safety Commission recommendation of carbon monoxide alarms on each level of the home, outside each sleeping area. If you ever smell gas, leave first and call your gas utility from a safe distance.

Do permits affect the cost of furnace replacement?

A permit adds a fee and an inspection step in the cities that require one, and the fee is usually a small part of the total. This is general guidance, not legal advice; confirm the current rules with your local building department.

• The City of Sugar Land requires a permit for HVAC repair, replacement or addition, and doubles the fee if work starts before the permit is issued.
• The cities of Houston, Katy, Pearland, Missouri City, Pasadena, Jersey Village and Humble issue mechanical permits for HVAC work; the City of Katy's permit page lists heating installation specifically.
• In unincorporated areas such as Spring, Aldine, Cinco Ranch, Fresno and The Woodlands, no county residential mechanical permit was found; the state code standard in 16 TAC §75.100(e) still applies.

Gas work can carry its own requirements, so ask your city whether a separate gas permit applies. Our Greater Houston HVAC permit guide has a city-by-city table. The quote should say whether a permit is included and who is responsible for it.

Are there rebates, tax credits or financing for a furnace?

Furnace incentives in the Houston area are limited: CenterPoint Energy's published residential incentives focus on electric heating and cooling equipment, the federal 25C credit has ended, and financing is the main way to spread the cost.

• CenterPoint Energy: CenterPoint's electric heating and cooling incentives are paid through participating contractors on qualifying AC and heat pump installations. We could not verify a current CenterPoint gas furnace rebate for Houston-area homes, so ask your contractor before counting on one.
• Federal tax credit: The Section 25C credit does not apply to property placed in service after December 31, 2025. See HVAC tax credits in 2026.
• Financing: Financing is available through FTL Finance, subject to credit approval.

What makes furnace quotes hard to compare?

Furnace quotes are hard to compare when they describe different jobs, so the lowest total is not always the lowest price for the same work. Watch for:

• Different efficiency tiers. An 80% quote and a condensing quote are different jobs with different venting.
• Venting left vague. A condensing furnace quote that does not describe the PVC vent route and the condensate drain is incomplete.
• Coil fit assumed. If the existing AC coil will not fit or pair, a new coil or adapter may be added later.
• Safety checks not listed. Gas leak, draft and combustion checks should be part of the job.
• Missing line items. Gas line work, drain, permit and disposal can be left off a low quote.
• Unclear warranty terms. Manufacturer parts coverage, including any heat exchanger coverage, is separate from installer labor coverage. Ask what each covers, for how long, and whether registration is required.

What should a written furnace quote include?

A complete written furnace quote names the exact equipment and lists every part of the job separately. Ask for:

1. Equipment model numbers for the furnace and, if replaced, the AC coil, plus the AHRI reference number when the furnace and AC are certified together, so you can check the combination in the AHRI Directory.
2. Efficiency and size: AFUE rating, input capacity, and burner and blower type.
3. How the size was chosen: whether a load calculation was done.
4. Labor, including attic work.
5. Venting: reused flue or new PVC vent runs, and where they exit.
6. Condensate drain for a condensing furnace, and overflow protection.
7. Gas line: reconnection, shutoff and any changes.
8. Safety checks: gas leak, draft and combustion testing.
9. Removal and disposal of the old furnace.
10. Permit: whether one is included where your city requires it.
11. Electrical and thermostat: any wiring changes and thermostat compatibility.
12. Ductwork changes: transitions, sealing or replacement.
13. Warranty terms: parts, heat exchanger, labor and any registration requirement.

To compare quotes apples-to-apples, line them up on those items. Where one quote includes something another does not, ask the second contractor to price it. Compare the same efficiency tier before comparing totals.

What should you do next?

Get a firm, itemized quote based on a look at your furnace location and vent path, then check other quotes against the list above. If your furnace might still be worth fixing, read furnace repair vs. replacement first.

JHC Cooling & Heating installs and services Goodman furnaces across Greater Houston. You can request a quote on heating installation & replacement or call (832) 447-3233.

Frequently Asked Questions

Why doesn't this guide give a furnace price?

An installed furnace price depends on the efficiency tier, the venting and gas work, and the AC coil pairing, none of which a website can see. A published number can set the wrong expectation. A written, itemized quote after an on-site look is the only reliable figure.

Is a 90% AFUE furnace worth it in Houston?

It depends on your gas use and the installation. Houston has light heating demand, about 1,266 heating degree days a year at IAH, so savings from a condensing furnace build slowly. A condensing furnace also needs PVC venting and a condensate drain, which can raise the installation cost.

Why does a condensing furnace need different venting?

A condensing furnace pulls so much heat from its exhaust that water condenses out of it. The cooler, wetter exhaust is vented through PVC pipe rather than a metal flue, and the water needs a condensate drain. Those changes are part of why its installed price is higher.

Should I replace my AC coil when I replace the furnace?

Not always. The coil sits on the furnace and must fit and pair with it. If the existing coil fits and your AC is in good shape, it can often stay. If the AC is aging too, replacing both together keeps the system matched.

Is there a rebate or tax credit for a new furnace in 2026?

The Section 25C credit does not apply to property placed in service after December 31, 2025. CenterPoint Energy's published electric incentives focus on AC and heat pumps, and a current Houston gas furnace rebate could not be verified. Financing is available through FTL Finance, subject to credit approval.

What safety checks should a furnace installation include?

A complete installation should include a gas leak check, a venting and draft check, and a combustion check, done by a licensed professional. Carbon monoxide alarms on each level of the home, outside each sleeping area, add a layer of protection.

Sources

1. ENERGY STAR (U.S. EPA), Furnaces: Key Product Criteria — AFUE ratings for ENERGY STAR-certified gas furnaces (as of October 2026)
2. NOAA NCEI — U.S. Climate Normals 1991–2020, Houston Intercontinental (USW00012960) — about 1,266 heating and 3,288 cooling degree days a year (as of October 2026)
3. U.S. EPA — Carbon Monoxide's Impact on Indoor Air Quality — furnaces as a CO source, symptoms, and CO alarm placement (as of October 2026)
4. CenterPoint Energy — What Should You Do If You Smell Natural Gas? — leave first, then call from a safe distance (as of October 2026)
5. ACCA — Manual J Residential Load Calculation — the standard for sizing residential HVAC equipment (as of October 2026)
6. AHRI Directory of Certified Product Performance — lookup for certified equipment combinations (as of October 2026)
7. Houston Permitting Center, mechanical permits — mechanical permits for HVAC alterations (as of October 2026)
8. City of Sugar Land, Permits Homeowner Brochure, and FY25 Fee Ordinance — permit for HVAC repair, replacement or addition; fee doubled if work starts first (as of October 2026)
9. City of Katy, Permits & Building — permit required for AC and heating installation (as of October 2026)
10. City of Pearland, Permits & Development Fees — residential mechanical permits (as of October 2026)
11. City of Missouri City, Mechanical Permit Application — mechanical permits (as of October 2026)
12. City of Pasadena, Residential Building Application — mechanical section permits (as of October 2026)
13. City of Jersey Village, Building Safety and Permits — mechanical permits (as of October 2026)
14. City of Humble, Fee Schedule effective October 1, 2024 — building permits administered by the Chief Building Official (as of October 2026)
15. 16 Tex. Admin. Code §75.100 (Cornell LII) — state code standard for areas without a local permit program (as of October 2026)
16. CenterPoint Energy — Heating and Cooling incentives — electric heating and cooling incentives through participating contractors (as of October 2026)
17. IRS — FAQs for modification of sections 25C, 25D and others under Public Law 119-21 (FS-2025-05) — Section 25C not allowed for property placed in service after December 31, 2025 (as of October 2026)
18. FTL Finance — Who We Are — HVAC financing provider (as of October 2026)