Furnace & Heating Replacement Cost in Lewisville, TX (2026)

Lewisville homeowners replacing a furnace or full heating system in 2026 should budget roughly $8,000 to $16,000 for a complete HVAC replacement, or $4,800 to $8,500 for an AC-only swap using existing ductwork — prices that are up 5 to 10 percent from two years ago due to new federal efficiency standards and the industry-wide transition away from R-410A refrigerant. North Texas winters are mild by national standards, but a gas furnace paired with a central air handler is still the dominant setup in Lewisville subdivisions, and aging equipment typically becomes unreliable right when temperatures in December and January finally dip. Getting two or three written quotes from licensed local contractors is the single most reliable way to land a fair price.

Quick Comparison

Contractor	Best For	Standout Fact	Notes
A#1 Air	Homeowners who want a large, long-established local operation	Founded 1987; corporate HQ at 601 E. Corporate Dr., Lewisville	Holds Texas HVAC license TACLB00018143E; anumber1air.com
Advent Air Conditioning	Ethics-focused buyers who prioritize third-party credentials	Only HVAC company to win BBB Torch Award for Ethics in North Texas; all techs NATE-certified	BBB member since 1994; adventair.com
Southern Comfort Mechanical	Lewisville residents who also need plumbing bundled	Four consecutive Best of Denton County wins; full HVAC and plumbing shop	Based at 174 Lake Park Rd, Lewisville; scmdfwair.com
Kelly’s Heating & Air	Buyers who want a long installation guarantee	Serving North Texas since 1907; offers a 10-year installation guarantee	Covers Lewisville, Flower Mound, and Carrollton; kellysheatingandair.com
Colony Air Conditioning & Heating	Homeowners who need financing flexibility	NATE-certified technicians; financing through Wells Fargo and Microf	colonyac.com

Best for Established Local Track Record

A#1 Air

A#1 Air has operated out of Lewisville since 1987, which means its technicians have worked in the city’s older subdivisions near Valley Ridge and the neighborhoods closer to Old Town as well as the newer construction along the 121 corridor. The company holds Texas HVAC license TACLB00018143E and maintains its corporate office at 601 E. Corporate Dr. in Lewisville. For homeowners who want a contractor with decades of local permitting history and a large service fleet, A#1 Air is a reasonable first call.

Best for Ethics Credentials and Technician Certification

Advent Air Conditioning

Advent Air was founded in 1981 by Mike Douglas in Lewisville and is the only HVAC company to have won the BBB Torch Award for Ethics in North Texas. Every technician on staff carries NATE certification, which is the industry’s most recognized independent credential for installation and service competency. Advent Air is also a member of the National Association of Home Builders and the Texas Association of Builders, which can matter when a replacement requires coordination with a home warranty or builder service agreement. The company has maintained BBB membership since 1994.

Best for Bundled HVAC and Plumbing Service

Southern Comfort Mechanical

Southern Comfort Mechanical, based at 174 Lake Park Rd in Lewisville, covers both HVAC and plumbing — a practical combination for older homes where a furnace replacement sometimes surfaces related water heater or gas line issues. The company has won Best of Denton County four years in a row, a reader-driven recognition that reflects consistent local reputation rather than a single award cycle. Homeowners who prefer to work with one contractor across multiple systems tend to find this kind of dual-trade shop efficient.

Best for Financing Options

Colony Air Conditioning and Heating

Colony AC serves Lewisville with a fully NATE-certified technician roster and offers financing through two separate lenders: Wells Fargo and Microf Financing. That dual-lender setup is worth noting because Microf specializes in customers who may not qualify for traditional bank financing, which gives Colony a broader approval rate than contractors who use a single credit provider. A full system replacement at $10,000 to $14,000 is a meaningful expense for most households, and structured monthly payments can make a higher-efficiency system more accessible.

Best for Long Installation Guarantee

Kelly’s Heating and Air

Kelly’s Heating and Air has been serving North Texas since 1907, making it one of the oldest continuously operating HVAC companies in the region, and it backs installations with a 10-year installation guarantee. The company uses licensed technicians and installs high-efficiency systems from brands including Goodman, Bryant, and Amana. Its service area covers Lewisville, Flower Mound, and Carrollton, which is useful for households that have rental properties or family members spread across those adjacent cities.

2026 Price Ranges to Know Before You Call

These are estimates based on current DFW market data. Your actual quote will depend on system size, efficiency rating, ductwork condition, and the specific contractor.

• AC-only replacement (using existing ductwork): $4,800 to $8,500 fully installed for the 2.5- to 3-ton systems most common in Lewisville homes
• Full HVAC replacement (AC, furnace, and air handler together): $8,000 to $16,000 installed
• Ductwork replacement, if needed: add $3,000 to $8,000 on top of equipment cost
• Capacitor replacement (common repair before deciding to replace): $150 to $450; after-hours calls can reach $300 to $700
• R-410A refrigerant transition surcharge: expect an added $500 to $1,000 on new equipment due to the 2026 shift to R-32 refrigerant under federal phase-out rules

One rebate is still available: Oncor’s Home Energy Efficiency program offers $400 to $600 back on qualifying high-efficiency equipment. The program runs January through November, so homeowners replacing systems during the summer season can still apply. Note that the federal Section 25C tax credit for HVAC equipment expired on December 31, 2025, and is not available for purchases made in 2026 as of this writing.

Lewisville sits in Denton County, and all HVAC replacement work requires a permit pulled through the city’s building inspections department. Reputable contractors will handle the permit as part of the job; if a quote explicitly excludes permitting, ask why.

Frequently Asked Questions

How much does a furnace replacement cost in Lewisville, TX in 2026?

A furnace-only replacement in Lewisville typically runs $2,500 to $5,500 installed depending on the unit’s capacity and efficiency rating. Most contractors bundle furnace and AC replacement together, so a full system swap is more commonly quoted in the $8,000 to $16,000 range.

Is it worth replacing just the furnace, or should I replace the whole HVAC system at once?

If your air conditioning unit is more than 10 to 12 years old and the furnace has also failed, most contractors and energy advisors recommend replacing both at the same time to avoid a second mobilization cost within a few years and to ensure the new equipment is properly matched for efficiency.

Are there any rebates or incentives for HVAC replacement in Lewisville in 2026?

Oncor’s Home Energy Efficiency program offers $400 to $600 on qualifying high-efficiency equipment through November 2026. The federal Section 25C tax credit expired at the end of 2025 and is not currently available for 2026 installations.

Do HVAC contractors in Lewisville pull permits for replacements?

Yes, the City of Lewisville requires permits for HVAC replacement work, and any licensed contractor operating legally will pull the permit as part of the installation. Always confirm permit inclusion before signing a contract.

How do I choose between local HVAC contractors in Lewisville?

Get at least two or three written, itemized quotes before committing. Look for NATE-certified technicians, a valid Texas HVAC license, and a clear warranty on both parts and labor. Checking BBB standing and reading reviews specific to Lewisville addresses — rather than reviews from across the broader DFW metro — gives a more accurate picture of local service quality.

Whatever system you choose, the most reliable protection against overpaying is a written quote that itemizes equipment, labor, permit fees, and warranty terms. No single contractor is the right fit for every household, and the few hours spent comparing proposals almost always recovers more money than any other step in the process.