The Infinity 98 gas furnace from Lennox represents a premium, high-efficiency option for homes that demand precise climate control and quiet operation. Understanding its price involves distinguishing the cost of the furnace unit from the installed system, as labor, ductwork, and add-ons influence the final number. This guide explains the price components, typical ranges, and the factors that affect cost, along with practical tips to secure the best value. Homeowners will also learn how energy savings, warranties, and financing options play into the overall investment.

What Is The Infinity 98 Gas Furnace?

The Infinity 98 gas furnace is Lennox’s top-tier offering in the Infinity Series. It delivers highly precise heating through a modulating gas valve and a variable-speed ECM blower, enabling smooth, consistent temperatures with minimal temperature swings. With an AFUE rating around 98%, it is designed to maximize energy efficiency in the right climate and duct system. The furnace commonly pairs with Lennox thermostats and air-quality accessories, creating a tightly integrated, high-performance heating system. Proper installation and compatible components are essential to realize both comfort and the anticipated price value.

Price Components: Furnace Unit Versus Installed System

To understand the Infinity 98 price, it helps to separate the furnace unit cost from the total installed price. The furnace unit is the core cost, while installation covers labor, permits, and any required modifications to make the system work in a home setting.

Furnace unit price: The Infinity 98 gas furnace itself typically falls in the higher end of the market due to advanced features such as modulation and a variable-speed blower. Expect a unit price in the several-thousand-dollar range, with variations by model, configuration, and retailer.
Installed system price: Installation adds labor, venting, ductwork adjustments, gas line considerations, electrical work, and potential equipment like a compatible air handler or humidification control. The installed price is often substantially higher than the unit price alone and can vary widely by home and region.

For budgeting, homeowners should plan for total installed costs that reflect both the premium furnace and the complexity of the job. Official dealer quotes will break these components out so buyers can compare apples to apples across contractors.

Typical Price Range For Infinity 98

Prices can vary by region, contractor, and the specifics of the home’s ductwork and gas line. The furnace itself generally costs more than mid-range models due to its advanced technology and efficiency. In many markets, a reasonable estimate for the furnace unit is in the range of several thousand dollars, with installed systems commonly falling into a broader range as labor and ancillary components are added.

Furnace unit price (furnace only): Approximately $3,000–$5,500, depending on the exact configuration and dealer pricing.
Installed price (furnace plus installation): Generally $6,000–$11,000 or more, influenced by ductwork needs, existing system compatibility, and local labor rates.

These ranges reflect typical market conditions and are provided to help homeowners compare quotes. For a precise figure, obtain written estimates from multiple Lennox-authorized dealers. The official Lennox page on Infinity Series gas furnaces notes the emphasis on high efficiency and smart compatibility, which correlates with higher upfront costs but potential long-term savings. For reference, see Lennox’s Infinity Series information at the manufacturer’s site.

What Affects The Price Of An Infinity 98 System

Several factors drive the final price. Understanding these can help homeowners plan accurately and decide where to allocate investment for best comfort and efficiency.

Efficiency and features: The 98% AFUE rating and modulation with a variable-speed blower add component costs, but improve energy savings and comfort.
System size and zoning: Larger homes or systems with multiple zones may require additional controls or a more capable air handler, raising both unit and installation costs.
Ductwork condition: If ducts are leaky or undersized, duct sealing, reinforcement, or reconfiguration may be necessary, increasing price but improving performance.
Venting and gas line updates: New or upgraded venting, condensate management, and gas supply improvements add to the cost.
Thermostat and controls: Integration with a Lennox iComfort thermostat or other smart controls can raise the price but often enhances efficiency and user experience.
Labor market and location: Regional differences in labor rates and permitting requirements influence total installed cost.
Warranty and service plans: Extended warranties or bundled maintenance plans can affect upfront price but provide long-term value and risk mitigation.

Energy Savings And Payback

Energy efficiency is a central consideration in the Infinity 98’s value proposition. With a high AFUE, the furnace uses fuel more efficiently, translating into lower monthly heating costs compared with older or less efficient models. Savings depend on climate, energy prices, and how well the home is insulated and vented.

In climate zones with cold winters, the payback period for a high-efficiency system like the Infinity 98 can range from several years to a decade, depending on fuel costs and usage patterns. In milder climates, annual savings may be smaller, but improved comfort and reduced temperature fluctuations remain compelling. Homeowners should consider the long-term bill reductions, as well as potential rebates or incentives that some utilities or local programs offer for upgrading to high-efficiency equipment.

Warranties, Financing Options, And Incentives

Warranty coverage and financing are significant factors in the overall value proposition. Lennox Infinity furnaces typically come with strong warranties on parts and heat exchangers, with terms varying by model and dealer. The length and scope of coverage can influence the effective price over time and reduce risk for homeowners.

Financing options, including promotional offers from manufacturers and third-party lenders, can make the upfront investment more accessible. Some utilities and government programs provide rebates or incentives for upgrading to high-efficiency heating equipment, which can further reduce net cost. Homeowners should ask about these programs when obtaining quotes and verify eligibility before purchasing.

Getting The Best Price: Tips For Buyers

To secure the best value on an Infinity 98 installation, prospective buyers should follow a structured quote process and verify each component of the proposal.

Shop multiple Lennox-authorized dealers: Obtain written estimates from at least three contractors to compare equipment, labor, and added services.
Ask for a detailed breakdown: Ensure quotes list the furnace model, size (output capacity), ductwork work, venting, thermostat, and any ancillary equipment separately.
Check system sizing and compatibility: Avoid oversized or undersized units. A proper load calculation (manual J) ensures the furnace is correctly sized for the home.
Inquire about add-ons only as needed: Humidifiers, air purification, zoning, and advanced thermostats add value but should align with needs and budget.
Consider maintenance plans: Some quotes include maintenance or service plans that reduce total ownership cost over time.
Factor in rebates and financing: Ask about current manufacturer rebates, utility incentives, and financing promotions to lower upfront costs.
Review warranty terms: Understand what is covered, for how long, and what constitutes a claim to avoid surprises later.

Maintenance And Longevity

Regular maintenance is essential for preserving performance and extending the life of an Infinity 98 system. Annually scheduled professional tune-ups help maintain high efficiency, ensure optimal flame integrity, and catch issues before they become expensive repairs. Homeowners should replace or clean filters regularly and address any unusual noises, temperature inconsistencies, or system short-cycling promptly. A well-maintained furnace not only preserves efficiency but supports the reliability of the higher upfront investment over many years.

What To Look For In A Quote

A clear, comprehensive quote helps homeowners compare value accurately. Key elements to verify include equipment model and AFUE rating, exact blower configuration (single-stage, two-stage, or modulating), installed ductwork scope, venting and gas line work, thermostat and controls, warranties, and the estimated time to complete installation. Ask for a written assurance of proper sizing, system efficiency targets, and post-installation testing. A trustworthy contractor will provide a detailed, transparent estimate and be ready to explain how each item affects long-term comfort and operating costs.