Cost of Lennox Furnace and Air Conditioner 2026
Prices for Lennox furnace and air conditioner systems often hinge on unit size, efficiency, installation complexity, and regional labor rates. The following cost guide outlines typical price ranges and key drivers to help buyers estimate a budget for a complete Lennox heating and cooling upgrade. The emphasis is on installed cost and per unit pricing where applicable.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Furnace (gas, Lennox) | $3,000 | $4,000 | $6,000 | AFUE 90 95 98 specs vary by model |
| Air Conditioner (Lennox, 2 ton) | $4,000 | $5,500 | $7,000 | Seasonal efficiency 13 to 21.5 SEER |
| Furnace + AC Installed (2 ton combo) | $8,500 | $12,000 | $16,000 | Labor, permits, ductwork may add |
| Thermostat and controls | $200 | $500 | $1,200 | Smart thermostat options |
| Delivery / Disposal / Misc | $300 | $800 | $1,500 | Old equipment removal often required |
| Warranty & Aftercare | $0 | $200 | $600 | Extended coverage varies |
| Taxes / Permits | $0 | $400 | $1,000 | Local requirements vary |
Assumptions: region, specs, labor hours
Overview Of Costs
Typical price range for a new Lennox furnace and air conditioner in the United States spans broad limits because of system size, efficiency, and installation complexity. For a standard 2 ton AC and a mid efficiency gas furnace, installed costs commonly fall within a combined range of about $8,500 to $16,000. Units with higher efficiency or larger capacity can push totals toward the upper end. The price per unit often reads as processing times: furnaces priced by unit plus AC priced by ton, with installation bundled.
Cost Breakdown
Breakdown outlines main cost categories and typical share for a Lennox system. A representative installation includes equipment, labor, permits, and any necessary ductwork or upgrades. The table below shows four to six columns reflecting common cost components.
| Category | Low | Average | High | Notes | Common Assumptions |
|---|---|---|---|---|---|
| Materials | $3,000 | $4,500 | $7,000 | Furnace and AC units | 2 ton AC; mid-range furnace |
| Labor | $1,200 | $2,500 | $4,000 | Install crew time | 1–2 technicians, 6–15 hours |
| Equipment | $0 | $500 | $1,500 | Smart controls, extras | Thermostats and sensors |
| Permits | $0 | $250 | $800 | Local permit costs | Regional rules vary |
| Delivery / Disposal | $200 | $600 | $1,200 | Old unit removal | Disposal fees may apply |
| Taxes | $0 | $150 | $600 | Sales tax | State dependent |
| Contingency | $0 | $300 | $1,000 | Unforeseen work | 10–15 percent common |
Assumptions: region, specs, labor hours
What Drives Price
Key price drivers include efficiency rating, furnace size, and air conditioner tonnage as well as installation complexity. Higher SEER ratings raise unit costs but can reduce long term energy bills. Gas furnace AFUE upgrades from 90 to 95 or 98 percent increase upfront price but improve efficiency. A larger 3–4 ton system costs more than a 2 ton unit if space or climate demand requires it.
Labor, Hours & Rates
Labor costs reflect crew size and project duration with typical installations requiring 6–15 hours for a standard swap or addition. Regional wage differences can swing total labor by ±10 to 25 percent. A rough labor formula is labor hours times hourly rate, though many shops bill a fixed project price.
Regional Price Differences
Prices vary across regions due to labor markets and permitting with three broad US patterns. In the Northeast, installed costs tend to be higher due to labor rates and stricter permitting; the Midwest generally offers mid-range prices; the South often yields lower installed costs on average. Expect regional deltas of roughly ±8 to ±15 percent from national averages.
Regional Price Differences Details
– Northeast: higher labor and higher permit costs
– Midwest: balanced pricing across furnace and AC packages
– South: competitive pricing but potential for additional duct or outdoor unit work
Real World Pricing Examples
Three scenario cards illustrate typical quotes for Lennox systems. Assumptions cover a 2 ton outdoor AC, a mid range gas furnace, standard ductwork, and a smart thermostat.
Basic – 2 ton AC, mid efficiency furnace, standard installation. Specs: Lennox SL25 furnace, 2 ton XC21 AC. Labor 8 hours. Total: $9,800. Per unit: AC $4,500, Furnace $4,300.
Mid-Range – Upgraded efficiency and controls. Specs: Lennox SLP98V furnace, 2 ton XP14 AC. Labor 12 hours. Total: $12,900. Per unit: Furnace $6,000, AC $6,900.
Premium – High efficiency with advanced zoning. Specs: Lennox gas furnace, 3 ton XC25 AC, smart home integration. Labor 15 hours. Total: $17,500. Per unit: Furnace $8,200, AC $9,300.
Assumptions: region, specs, labor hours
Cost Compared To Alternatives
Comparing Lennox to other brands helps assess value in upfront cost versus efficiency and reliability. Lennox generally sits in the premium tier, with higher initial costs but potential energy savings and robust warranties. Alternatives may offer lower upfront prices but similar installation complexity and performance over time. The decision should weigh long term energy use against upfront cash outlay.
Maintenance & Ownership Costs
Ongoing costs include routine maintenance and occasional repairs and depend on equipment age and usage. Annual service typically ranges from $100 to $300 for preventive checks. Lennox units with high efficiency may have more expensive parts but lower running costs. Five-year maintenance outlook helps reveal total cost of ownership.
Seasonality & Price Trends
Prices can shift with seasonality as contractors manage demand. Off season (late spring and early fall) often presents more favorable installation schedules and sometimes lower rates. Peak heating season tends to raise labor availability costs and may stretch timelines.
Permits, Codes & Rebates
Local rules and incentives influence final pricing. Some regions require permits that add to the project total; rebates or tax credits for high efficiency units can reduce net cost. Availability of incentives varies by state and utility programs.
Frequently Asked Price Questions
Common questions center on whether to replace only the furnace, only the AC, or both. In many cases replacing both with a matched Lennox system yields the best efficiency and warranty alignment. Expect total costs to be driven by size, efficiency, and installation complexity rather than brand alone.