How Much Does a New Furnace Cost in Lewisville, TX?

Nathan Reeves
7 days ago
6 min read

If you're considering getting a new furnace installed before winter arrives, you probably want to know how much furnace installation costs.

Here, we've shared a clear, locally grounded breakdown of what a new furnace costs for homeowners in the Lewisville area, and what drives that number up or down.

Key Takeaways:

Most new furnace installations in Lewisville, TX cost between $4,000 to $8,500 for the average home. Basic replacements can start around $3,500, while high-end systems often exceed $10,000.
Gas furnaces are still the most popular choice in Lewisville, and for good reason. Electric furnaces might be cheaper to install, but they can end up costing more in electricity bills, especially with Texas rates being what they are.
The biggest cost drivers are how big your home is, the efficiency rating of the furnace, the condition of your ductwork, and whether you're switching over from an old unit that uses a different fuel.
Furnaces can be categorized as single-stage, two-stage, or modulating based on their performance, and each tier carries a different price point.

Average New Furnace Cost in Lewisville, TX (Fast Answer)

Just looking for the quick answer? Based on our own experience delivering heating services to North Texas homes, here's what Lewisville homeowners can expect to pay for a new furnace installation:

Basic, standard-efficiency gas furnace replacement: about $3,500 to $5,000 installed
Mid-range, higher-efficiency gas furnace: about $4,500 to $8,000 installed
High-efficiency or variable-speed gas furnaces for larger homes: about $7,000 to $10,000+ installed

These estimates usually include the cost of new furnace equipment, installation labor, removal of the old unit, a new thermostat if needed, and any minor adjustments to the ductwork. Keep in mind that furnace installation costs can vary from $3,800 to $12,000 nationally, while in Lewisville, most standard projects come in between $3,586 and $7,000.

Price Tiers: Basic, Mid-Range, and High-Efficiency Furnaces

The majority of Lewisville homeowners fall into one of three tiers when buying a new furnace. Furnace efficiency is measured by the Annual Fuel Utilization Efficiency rating, and the tier you choose has a big impact on both upfront cost and long-term savings.

Basic Gas Furnaces

Basic gas furnaces generally run around 80% AFUE (annual fuel utilisation efficiency) with a single-stage blower. You can expect to pay around $3,500 to $5,000 installed for a basic single-stage furnace in a typical 1,500 to 2,000 sq ft home.

These units work well if you're looking to make a budget-minded replacement and your ductwork is already in good shape.

Mid-Range Furnaces

Mid-range furnaces hit 90 to 95% AFUE, often with two-stage burners and an ECM blower motor. The price of a professional installation is roughly $4,500 to $8,000, depending on the size of the furnace you need and any code upgrades.

These modern furnaces achieve high efficiency ratings of 90 to 98%, and while high-efficiency models cost more upfront, they can help you save money in the long run by cutting heating costs by hundreds annually compared to older equipment.

Premium Furnaces

Premium, high-efficiency furnaces can reach 96 to 98%+ AFUE with variable-speed blowers and advanced comfort controls, and even sometimes come with a communicating thermostat. The cost of a premium furnace installation runs about $7,000 to $10,000+, especially if you have a larger home or your contractor identifies that the furnace installation process is likely to be complex.

These high-efficiency furnace installations can reach up to $10,000, but high-efficiency models typically offer significantly lower utility costs over time.

If you're not sure what you need, we can show you side-by-side options so you can compare upfront cost versus long-term energy savings on your actual Oncor or CoServ bills. Contact us for a no-obligation chat or to receive a free quote (we always offer transparent pricing).

Gas vs. Electric Furnace Costs in Lewisville, TX

Lewisville homes tend to rely on gas furnaces, but some all-electric neighborhoods use electric furnaces or heat strips in air handlers.

The table below compares the cost of electric furnaces versus gas options:

Feature	Gas Furnace	Electric Furnace
Typical installed cost	$3,500–$9,000 depending on efficiency and capacity	$3,000–$6,500 (assuming no major electrical panel upgrade)
Upfront cost	Slightly higher installation cost	Lower initial installation cost
Running costs	Lower monthly operating costs in North Texas	Higher long-term operating costs
Fuel source	Natural gas or propane	Electricity
Cost efficiency	Natural gas and propane generally provide a lower cost per BTU than electricity in North Texas	Electricity costs are typically higher, especially with Oncor delivery charges of around 5.6¢/kWh added to retail energy rates
Best suited for	Homeowners looking for lower heating costs over the life of the system	Homeowners prioritising a lower upfront investment over long-term operating savings

There's no best choice between a gas and electric furnace for everyone. Your decision will depend on a few key things, including whether you've got a gas line already hooked up at your home, if you need existing furnace removal before the new unit is installed, what utility rates are like locally, and whether you're thinking about making upgrades like installing a heat pump in the future.

Key Factors That Affect Furnace Installation Cost

Two homes in the same Lewisville subdivision can have very different furnace installation costs. Some of the key factors affecting how much you'll spend are:

Your Home Size & Load

The size of your home can make a real difference in how big a furnace you need. That's why the size of the furnace (measured in BTU capacity) depends on things like square footage, insulation, the number of stories, and local climate conditions.

Proper sizing for your furnace so it meets your heating needs is essential. If the furnace is too big for your home, it'll run inefficiently and maybe even short-cycle a lot. But if it's too small, it'll run all the time and waste a lot of energy. A well-sized furnace can save you upwards of $3,000 on energy bills over 15 years.

The Furnace's Efficiency Level and Features

Higher AFUE, multi-stage burners, and variable-speed blower motors cost more upfront but can significantly reduce your energy bills during a typical North Texas winter.

According to the U.S. Department of Energy, upgrading from an old 80% unit to a 95% AFUE system can save you several hundred dollars annually, so it's well worth considering.

The Condition Of Your Ductwork

If your ducts are old, leaky, or undersized, you may need to shell out an extra $500 to $3,000 to repair or replace them, and that's not unusual in older homes in the Lewisville area that have attic duct systems.

The Installation Complexity

If your furnace is in a difficult-to-access area, your contractor may need to charge for extra labour and safety gear to get the job done. Labour costs can vary depending on the contractor, from $75 to $150 an hour. You might also need to invest in electrical upgrades, new venting, or gas line work, which can all add to the final bill.

Generally, the more complex the installation, the higher the costs are likely to be.

Financing, Rebates, and Getting an Accurate Quote in Lewisville

Most of us can't imagine spending $4,000–$8,000+ on a new furnace installation. The good news is that you may be able to use financing options or take advantage of rebates and incentives to help make the overall cost more manageable.

We offer financing options through GreenSky with low monthly payments, subject to credit approval. Flexible financing includes low or no interest for qualified buyers, and this allows you to spread the cost of a new furnace installation, making it possible to upgrade to a more efficient gas furnace that pays for itself through long-term savings on your monthly bills. Ask about our current financing offers during your furnace assessment.
Certain high-efficiency furnaces may qualify for utility rebates or federal tax credits. Your total energy savings can exceed $3,000 to $5,000 over 15 years when you combine rebates with lower operating costs. We recommend looking for current Oncor or CoServ programs — we can help identify applicable Lewisville-area rebates at the time of your estimate.

If you're keen to find out exactly what a properly sized furnace costs for your home, contact us today. We're happy to provide a no-obligation Lewisville furnace installation quote tailored to your home and budget. And, if you're happy to go ahead, you can trust us for a quality furnace installation. We can also remove your old furnace if needed.

FAQ

Here are answers to common questions Lewisville homeowners ask that weren't fully covered above.

How long does a typical furnace installation take in a Lewisville home?

Installation time for a standard furnace is usually 4-8 hours, assuming no major duct or electrical work. More complex jobs - attic access issues, significant duct changes, or system conversions - can take a full day or occasionally span into a second visit. We provide a time estimate before work begins so you can plan your day.

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

Yes. The City of Lewisville requires mechanical permits for furnace replacement and related gas or electrical work. Reputable contractors like Koala-T Heating & Air handle permits and code compliance as part of the project, so you don't have to manage it yourself.

What size furnace do I need for my Lewisville house?

Furnace size is measured in BTUs and depends on square footage, insulation, window quality, and exposure to winter wind in North Texas. Many well-insulated 1,800–2,200 sq ft homes need something in the 60,000–80,000 BTU range, but we always run a professional load calculation rather than guessing. An oversized furnace short-cycles and wastes energy, while an undersized one can't keep up during cold snaps.