Furnace replacement cost in DFW for 2026: 80% vs 96% AFUE, attic install costs, permits, and when replacing the AC at the same time saves money.
Furnace replacement cost in DFW varies more than most people expect. Two quotes for “a new furnace” on the same house can sit $3,000 apart, and the difference is rarely the brand. It’s efficiency, size, where the furnace sits, what the venting needs, and whether the air conditioner is being replaced at the same time. Here’s how the numbers break down in North Texas in 2026.
Typical installed ranges for a gas furnace replacement across Dallas-Fort Worth — a guide, not a quote:
| Furnace Type | Typical Installed Range | Notes |
|---|---|---|
| 80% AFUE, single-stage | $3,200–$5,000 | Most common in DFW attics; reuses metal flue |
| 80% AFUE, two-stage / variable-speed blower | $4,200–$6,200 | Quieter, better airflow control with a matched AC |
| 96% AFUE, two-stage | $5,500–$8,500 | Needs PVC venting and condensate drain |
| 96%+ AFUE, modulating | $7,000–$10,500 | Rarely pays back in a mild-winter climate |
Size moves the price less than efficiency does. Most DFW homes take a 60,000–100,000 BTU furnace, and the step between sizes is usually a few hundred dollars. What matters more is that the size comes from a load calculation, not from the label on the old unit — many existing furnaces here are oversized.
Often not. Heating season in Dallas-Fort Worth is short, and annual gas heating costs for a typical home are modest compared to the North. The jump from 80% to 96% saves roughly 15% of that heating bill, which can take well over a decade to recover the extra installed cost — longer when an attic install needs new PVC venting and a condensate line run through the house.
A high-efficiency furnace makes more sense when the furnace sits in a conditioned space, when the existing venting needs replacing anyway, or when a rebate covers a meaningful share of the difference. For homes weighing a different direction entirely, our heat pump vs gas furnace comparison covers the trade-off.
If the air conditioner is within a few years of the furnace’s age, usually yes. The furnace blower moves the air for both heating and cooling, and the AC coil sits on top of the furnace. Replacing them together typically saves $1,000–$2,000 in labor versus two separate jobs, lets the blower and coil be properly matched, and avoids pairing a new furnace with an AC on the older R-410A platform that will be harder to service.
Paired gas furnace and AC replacements in DFW commonly run $9,500–$17,000 depending on capacity and efficiency. A heat pump with a gas furnace backup — a dual-fuel system — usually lands in a similar range and is worth pricing alongside. Our heat pump services page covers how those systems are set up.
Age alone isn’t the trigger. A furnace past 20 years with a cracked heat exchanger, repeated control failures, or venting that no longer meets code is a replacement. A 14-year-old furnace with a failed igniter is a repair. For realistic lifespans in this climate, see how long HVAC systems last in North Texas.
We install furnaces across Dallas, Fort Worth, McKinney and the rest of the metroplex, with permits pulled on every job. Call 214-900-2533 or see our furnace installation services for a written, itemized quote.
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Kenny founded Absolute Comfort Mechanical after more than 20 years in the Dallas–Fort Worth HVAC trade, because he was tired of watching homeowners get sold equipment they didn't need. He still runs diagnostics himself and reviews the technical advice published on this site.
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Absolute Comfort Mechanical HVAC — licensed, insured, family-owned, serving the Dallas–Fort Worth metroplex. Call 214-900-2533 for 24/7 AC repair, heating, cooling, and commercial refrigeration service.
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