Furnace & Heating Replacement Cost in Flower Mound, TX (2026)

Furnace & Heating Replacement Cost in Flower Mound, TX (2026)

Replacing a furnace or full heating system in Flower Mound typically costs between $3,500 and $10,000 for the unit and installation alone, with full HVAC system replacements — furnace, air handler, and AC combined — running $8,000 to $16,000 in the DFW market this year. Prices have risen 5 to 10 percent compared to 2024, driven largely by new federal efficiency standards and the ongoing refrigerant transition to R-454B. If you are getting bids right now, the ranges below reflect what Flower Mound homeowners are actually paying in mid-2026.

Quick Comparison

Company	Best For	Standout Fact	Notes
Triple A AC, Heating & Plumbing	Homeowners who want a long-track-record family company	50-plus years in business; 100% money-back guarantee on installations	Serves Flower Mound and Irving; Aggie 100 award winner
LEX Air Conditioning, Heating, Plumbing & Electrical	Buyers who prioritize verified credentials and consumer protections	BBB A+, Google Guaranteed, NATE-certified techs	Over 22 years serving Flower Mound specifically
Graco Heating & Air	Fast turnaround; homeowners near the Highway 121 corridor	Same-day dispatch from East Hwy 121 office since 1994	Armstrong ProTeam contractor; TX License #TACLA00017212E
Honest Home Services LLC	24/7 emergency heating failures	Recognized as a top-three HVAC company in Denton County	Flower Mound-based; BBB A+ rating
Medley Heating, Air Conditioning & Plumbing	Homeowners who prefer a locally embedded crew	Flower Mound residents on staff; all employees, no subcontractors	NATE-certified; fully licensed and insured
Southern Comfort Mechanical	Preventative maintenance and energy-efficiency upgrades	Licensed TX contractor headquartered in Lewisville at 174 Lake Park Rd	TX License #TACLA104577C

Best for Long Track Record and a Strong Guarantee

Triple A AC, Heating & Plumbing

Triple A has been in the DFW HVAC business for more than 50 years across three generations of the same family, which gives them a depth of experience that newer companies simply cannot match. Their 100-Degree Comfort Guarantee and 100 percent money-back guarantee on system installations are unusually strong commitments in a market where most contractors offer only standard manufacturer warranties. For Flower Mound homeowners replacing an aging system heading into a North Texas summer, that kind of backstop matters.

Best for Verified Credentials and Consumer Trust

LEX Air Conditioning, Heating, Plumbing & Electrical

LEX holds a BBB A+ rating, is Google Guaranteed, and employs NATE-certified technicians who are background-checked and continuously trained. NATE certification means technicians have passed independent third-party exams on HVAC installation and service — not just manufacturer training. LEX has served Flower Mound homeowners for over 22 years, so they are familiar with the mix of housing stock found across neighborhoods like Lakeside and The Shores, where system sizing and duct configuration vary considerably.

Best for Same-Day Service and Local Proximity

Graco Heating & Air

Graco has operated out of Lewisville since 1994 and dispatches same-day from an office on East Highway 121, putting them within a short drive of virtually every corner of Flower Mound. They hold Texas HVAC contractor license #TACLA00017212E and work as an Armstrong ProTeam contractor. If your furnace fails on a cold January night — and Flower Mound does get hard freezes — same-day availability from a licensed local shop is worth factoring into your choice.

Best for 24/7 Emergency Calls

Honest Home Services LLC

Honest Home Services is based in Flower Mound, holds a BBB A+ rating, and is recognized as one of the top three HVAC companies in Denton County. Their 24/7 emergency support is a genuine differentiator for heating failures, which in Flower Mound most often happen during the brief but serious cold snaps the area sees between December and February. They cover the full range of services from heating replacement to indoor air quality improvements.

Best for a Tight-Knit Local Crew

Medley Heating, Air Conditioning & Plumbing

Medley is a small, family-owned company with Flower Mound residents on staff who serve their own community. All technicians are direct employees — not subcontractors — and are NATE-certified, licensed, insured, and background-checked. For homeowners who want to know exactly who is walking through their door, the employee-only model removes a common source of uncertainty in the contractor industry.

2026 Price Ranges: What to Expect

All figures below are estimates based on published DFW market data and should be used as planning benchmarks, not firm quotes. Get written bids before committing.

Furnace replacement only (gas furnace, existing system): Roughly $2,500 to $5,500 installed for most Flower Mound homes, depending on unit size, efficiency rating, and attic or closet access.

Full HVAC system replacement (furnace plus AC plus air handler): $8,000 to $16,000 in the DFW market; most mid-tier replacements using existing ductwork land between $9,000 and $13,000.

Ductwork replacement (if needed): Add $3,000 to $8,000 on top of the system cost. Older Flower Mound homes built in the 1990s may have ductwork that no longer meets current efficiency expectations.

Refrigerant transition surcharge: The shift to R-454B refrigerant has added roughly $500 to $1,000 to unit costs across the board in 2026.

Furnace repair (non-replacement): Most repairs fall between $150 and $1,500. Diagnostic fees run $79 to $250; ignitor replacement is typically $250 to $700; control board replacement runs $500 to $1,500; blower motor work ranges from $300 to $2,500.

Flower Mound requires permits for HVAC system replacements through the town’s Building Inspections department. Any licensed contractor you hire should pull that permit on your behalf — if they suggest skipping it, that is a red flag.

Frequently Asked Questions

How much does furnace replacement cost in Flower Mound in 2026?

Most Flower Mound homeowners pay between $2,500 and $5,500 for a furnace-only replacement, installed. A full system swap including AC and air handler typically runs $8,000 to $16,000 depending on home size, efficiency tier, and whether ductwork needs updating.

Do I need a permit to replace my furnace in Flower Mound, TX?

Yes. The Town of Flower Mound requires a mechanical permit for HVAC system replacements. Your licensed contractor should handle the permit application; work done without a permit can create complications when you sell your home.

How do I know if a heating contractor is licensed in Texas?

Texas requires HVAC contractors to be licensed by the Texas Department of Licensing and Regulation (TDLR). You can verify any contractor’s license number on the TDLR website. Contractors must have at least four years of qualifying experience and carry proof of insurance.

Is it worth repairing my furnace or should I replace it?

A general rule of thumb: if the repair cost exceeds 50 percent of the price of a new system and the furnace is more than 15 years old, replacement usually makes more financial sense. In Flower Mound’s mild but occasionally harsh winters, an unreliable furnace is a real risk worth weighing against repair costs.

How many quotes should I get before replacing my furnace?

Three written quotes from licensed contractors is the standard recommendation, and it holds here. Prices and included warranties vary more than most homeowners expect, and a written quote protects you if the final invoice differs from what was discussed verbally.