A Lennox split system typically costs $6,000-$15,000 installed for a standard central air conditioner and furnace replacement; premium equipment or difficult installation can push the total above $20,000. Lennox split system price depends mainly on system type, capacity, efficiency, duct condition, and local labor rates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Central AC and furnace | $6,000 | $11,000 | $20,000+ | Installed; standard to premium equipment |
| Heat pump split system | $7,000 | $12,500 | $22,000+ | Installed; indoor air handler included |
| Outdoor AC condenser | $2,000 | $4,000 | $8,000 | Equipment only, before installation |
| Installed central AC | $4,500 | $8,000 | $14,000 | Typical 2-5 ton replacement |
Installed Lennox prices for common home systems
A basic Lennox split setup with a single-stage air conditioner and compatible furnace often lands near $6,000-$10,000 installed. Midrange two-stage equipment and a standard 2,000-square-foot home commonly total $9,000-$15,000. Variable-capacity systems, high-efficiency furnaces, and extensive duct or electrical work can raise quotes to $16,000-$22,000 or more.
For a straightforward replacement, budgeting about $8,000-$14,000 covers many standard Lennox AC-and-furnace installations. Heat pump systems generally cost more upfront than basic AC-only equipment, but may replace both heating and cooling equipment. Assumptions: U.S. average labor, standard access, existing ducts usable, and no major electrical upgrades.
What condenser, furnace, and labor add to the quote
Installed quotes combine equipment, removal, installation labor, and any necessary modifications. The ranges below reflect common residential work, not a fixed Lennox price list; contractor pricing and included parts vary.
| Quote component | Typical range | What it covers |
|---|---|---|
| Outdoor AC unit | $2,000-$8,000 | Condenser, capacity, and efficiency tier |
| Indoor furnace or air handler | $1,500-$5,000 | Heating equipment or heat pump air handler |
| Labor and startup | $1,500-$4,000 | Removal, setting equipment, connections, testing |
| Materials and controls | $300-$1,500 | Lineset, thermostat, pad, wiring, fittings |
| Permits and disposal | $100-$800 | Local permit fees and old-unit haul-away |
Labor is often a substantial share of the estimate, especially when the indoor and outdoor units both need replacement. A labor planning range of $75-$150 per technician-hour is useful for comparing itemized bids, although many contractors quote a fixed project price.
How tonnage and SEER2 ratings change Lennox pricing
Capacity must match the home’s cooling load, rather than being chosen by square footage alone. Many houses use 2-5 tons, but insulation, windows, climate, and duct design affect sizing. Moving from a 2-ton to a 4-ton system can add roughly $1,000-$3,000 to equipment and installation costs.
Efficiency also changes the price. A basic single-stage model usually costs less than a two-stage or variable-capacity unit. Depending on model and contractor, a higher-efficiency upgrade may add $1,000-$4,000 or more. Compare the specific SEER2 rating, capacity, and included controls—not just the Lennox name or model tier. Ask for a load calculation and confirmation that the indoor coil and outdoor unit are matched.
AC and furnace versus Lennox heat pump pricing
A conventional split system pairs an outdoor air conditioner with an indoor gas furnace. A heat pump uses the outdoor unit for heating and cooling, paired with an air handler or compatible furnace. For common installations, a heat pump may cost $1,000-$4,000 more than a basic AC replacement, depending on whether indoor equipment, backup heat, or electrical changes are included.
Compare complete system totals because an AC-only quote is not equivalent to a heat pump or AC-and-furnace package. In a home with usable ducts and an existing furnace, replacing only the AC can be less expensive; replacing both units may improve equipment compatibility and avoid a second installation later.
Regional labor and installation conditions behind quotes
Prices can vary by roughly 10%-25% between lower-cost rural markets and high-cost metro areas. Local wages, permitting, contractor availability, and sales tax affect the final bill. Hot-climate demand can also influence scheduling and quote availability during peak cooling season.
Installation conditions matter as much as location. A simple swap with accessible equipment may stay near the lower end of the range. Tight attic access, a second-floor air handler, long refrigerant lines, or a 200-amp electrical panel upgrade can add hundreds to several thousand dollars. Ask bidders to identify each site-specific charge and whether it is required by code or optional.
Three Lennox quote examples with different scopes
| Project | Scope and labor | Estimated total |
|---|---|---|
| Basic AC replacement | 2.5 tons, standard efficiency, 10-14 labor hours | $6,000-$9,000 |
| Matched AC and furnace | 3 tons, midrange equipment, 16-22 labor hours | $10,000-$15,000 |
| Premium heat pump | 4 tons, variable capacity, electrical or controls work, 20-30 labor hours | $16,000-$23,000+ |
These examples are budgeting scenarios, not Lennox dealer offers. They assume ordinary duct access and exclude extensive duct replacement; local quotes can fall outside the ranges if equipment, labor, or code work differs.
When line-set, ductwork, and electrical extras raise costs
Common add-ons include a new refrigerant line set at about $300-$1,500, thermostat replacement at $150-$600, and duct repairs from $300 to several thousand dollars. A full duct replacement can cost $2,000-$7,000 or more, depending on home size and access. Electrical circuit or panel work may add $500-$3,000.
Old refrigerant lines may be reusable if their size and condition meet the new system’s requirements. Request separate prices for required code corrections, recommended repairs, and optional upgrades. A quote should also state whether permits, refrigerant recovery, equipment disposal, condensate work, and startup testing are included.
Ways to lower a Lennox replacement estimate
Keep the project scope clear: replace only equipment that is failing unless the furnace, coil, or heat pump is near the end of its service life or incompatible with the new unit. Avoid paying for capacity beyond a documented load calculation, and compare standard, two-stage, and variable-capacity models with the same tonnage and included accessories.
Get at least three itemized bids for the same equipment configuration and ask contractors to list model numbers, labor warranty, permit fees, and removal charges. Scheduling outside the busiest heating or cooling periods may improve contractor availability, though savings are not guaranteed. The best price comparison is a matched scope with equipment, installation work, and warranty stated separately.