Costco Lennox HVAC cost typically falls between $6,500 and $18,000 for a complete, professionally installed heating and cooling system, with many standard replacements near $11,000. Final pricing depends on equipment size and efficiency, ductwork, local labor, and the contractor’s offer; Costco does not publish one nationwide Lennox price list.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed Lennox central HVAC system | $6,500 | $11,000 | $18,000 | Typical furnace and central AC replacement with standard access |
| Installed Lennox air conditioner | $4,500 | $7,500 | $12,500 | Outdoor condenser and indoor coil; furnace may be separate |
| Installed Lennox furnace | $3,500 | $6,000 | $10,000 | Price varies with fuel, capacity, and efficiency |
| Costco Shop Card or promotion | $0 | Offer-dependent | Offer-dependent | Verify current terms, eligibility, and limits with Costco |
Costco Lennox HVAC prices for a full replacement
A typical complete replacement with a Lennox gas furnace and central air conditioner costs about $8,000-$14,000 before any applicable promotion. A straightforward, lower-tier system in a smaller home may come in around $6,500-$9,000, while a larger home or higher-efficiency equipment can reach $14,000-$18,000 or more.
For budgeting, about $11,000 is a reasonable midpoint for a standard whole-system replacement. The estimate assumes existing ductwork is serviceable, equipment can be replaced in the same locations, and the home does not need major electrical, refrigerant-line, or code upgrades. Higher-cost coastal metros and areas with limited contractor availability can exceed these ranges.
For a rough capacity comparison, central air conditioning often costs $1,500-$3,000 per ton installed, though this is not a reliable substitute for a written system quote. A common 2- to 3-ton AC replacement may total $4,500-$9,000, while a 4- to 5-ton installation can run $7,000-$12,500. Correct sizing requires a load calculation, not simply matching the old unit.
Lennox product families span basic single-stage equipment through variable-capacity systems. A contractor may quote different models, controls, and warranty terms under the same brand. Costco’s role may include a member offer or contractor connection, but installation is generally performed by a local participating service provider. Assumptions: U.S. pricing, standard residential access, existing ducts in usable condition, and no major structural repairs.
What furnace, coil, labor, and equipment add to the quote
An installed price combines equipment and field work, not just the outdoor unit. The table shows typical portions of a midrange $11,000 replacement. Actual bids may bundle parts differently, so the line items are useful for comparison rather than fixed national rates.
| Quote component | Typical range | Common pricing basis | What it covers | Cost concern |
|---|---|---|---|---|
| Lennox furnace, AC, and coil | $5,000-$8,500 | $4,500-$12,500 per installed system portion | Heating and cooling equipment, indoor coil, standard controls | Capacity and efficiency level |
| Installation labor | $1,500-$3,500 | $75-$150 per crew hour, depending on market | Removal, setting equipment, connections, startup | Access and scope of changeout |
| Materials and accessories | $300-$1,200 | $100-$600 per item or run | Lineset, fittings, pad, drain, thermostat, wiring | Reuse versus replacement |
| Removal and disposal | $150-$600 | $75-$300 per major unit | Hauling away old furnace, coil, and condenser | Disposal or refrigerant handling requirements |
| Permits and inspections | $100-$500 | Local permit fee | Permit application and required inspection | City or county rules |
| Duct or electrical work | $0-$3,000+ | $10-$35 per linear ft for duct modifications | Repairs, transitions, circuits, or code corrections | Not always included in base bid |
Ask whether the written total includes startup, permits, haul-away, and all required accessories. A low equipment price can rise after a site visit if the contractor finds an incompatible coil, damaged duct connection, undersized electrical circuit, or condensate drainage issue. Sales tax treatment varies by state and by whether the invoice separates equipment and labor.
Labor estimates vary by crew size and project complexity. A standard replacement might require two or three technicians for 8-12 hours, while substantial duct changes or difficult attic access can extend the job. A contractor’s labor rate is not necessarily the crew’s wage; it can also cover insurance, vehicles, supervision, and business overhead.
How tonnage, SEER2, and furnace efficiency shift cost
System capacity is a major price driver. A 2-ton unit can cost less than a 4-ton model, but oversizing may cause short cycling, uneven comfort, and unnecessary expense. For a home of roughly 1,200-1,600 square feet, a contractor might evaluate a 2- to 3-ton cooling system; a 2,000-2,500-square-foot home could require 3-5 tons. Climate, insulation, windows, ceiling height, and sun exposure can change the calculation substantially.
Require a documented load calculation when the proposed size differs from the existing equipment. A larger condenser, furnace, or air handler may add $500-$2,000 or more, depending on capacity and associated components. A professional should confirm both heating and cooling requirements rather than select equipment from floor area alone.
Efficiency also affects the estimate. A standard single-stage AC and furnace combination may cost $8,000-$12,000 installed, while a higher-efficiency or variable-capacity package can add roughly $2,000-$6,000. Higher SEER2 ratings, two-stage operation, communicating controls, and modulating furnaces can raise equipment and setup costs. Savings depend on local utility rates, climate, usage, and how long the household keeps the system.
For gas furnaces, a basic efficiency level may be around 80% AFUE, while high-efficiency models commonly reach about 90%-98% AFUE. Moving to a condensing furnace can require new PVC venting and condensate drainage, adding approximately $300-$1,500 where those connections are not already available. Regional energy codes may also set minimum efficiency requirements.
Does a Costco Shop Card make Lennox bids cheaper?
Costco promotions can change the effective value of a Lennox purchase, but the offer is not the same as a lower contractor invoice. The amount, eligible products, participating providers, membership requirements, expiration dates, and redemption rules can vary. Some offers provide a Costco Shop Card rather than a cash discount, and terms may exclude certain work or limit the reward.
Compare the final out-of-pocket amount after confirmed incentives, not the headline reward alone. Get the contractor’s full installed quote and verify the promotion in writing before signing. Ask whether the offer applies to equipment, labor, or both, whether it can combine with manufacturer rebates, and when the reward is issued.
Compare at least two itemized local bids for the same equipment capacity, efficiency, thermostat, and scope. If a Costco-connected quote is $12,000 and a competing bid is $10,800 for genuinely comparable work, a $1,000 eligible reward could make the first option close in net price; differing warranties, included duct work, or payment fees could still change the comparison. Do not assume every Lennox dealer participates in Costco or honors the same terms.
Also check financing carefully. Promotional financing can have deferred-interest rules, origination costs, or a higher cash price. A monthly payment is not an apples-to-apples price comparison unless the total repayment, fees, and term are clear.
When ductwork and electrical upgrades raise the project total
Replacing equipment in the same configuration is usually less expensive than changing the distribution system. Sealing or repairing a short duct run may cost $300-$1,000, while replacing several accessible runs can reach $1,500-$4,000. Full duct replacement in a typical home may add $5,000-$12,000, especially when ducts are buried, in a crawlspace, or difficult to reach.
Request separate prices for required repairs and optional comfort upgrades. A quote should identify whether the contractor has measured airflow and static pressure, rather than recommending new ductwork without explaining the issue. A return-air modification, new plenum, or transition fitting may be necessary even when most ducts can remain.
Other common extras include a new thermostat at $150-$700 installed, a condensate pump at $150-$450, refrigerant line replacement at $400-$1,500, and electrical corrections at $250-$1,500. A new disconnect, circuit, or panel work can exceed those amounts if the existing service is inadequate. Attic or crawlspace access, asbestos-containing materials, and structural obstacles require specialist evaluation and can add substantial expense.
Old equipment removal is often included, but it should be listed. Verify refrigerant recovery and disposal, as well as whether the contractor will remove the furnace, coil, and outdoor condenser. Permits and inspections are also worth checking: a $100-$500 permit allowance is common, but local fees and required code work differ.
How long Lennox installation takes and what labor covers
A like-for-like furnace and AC replacement often takes one working day, approximately 8-12 hours for a small crew. A furnace-only or AC-only changeout may take 4-8 hours. Adding duct modifications, venting, electrical work, or equipment in a cramped attic can extend the job to two days or longer.
Labor should include more than removing the old units and connecting the new ones. A complete scope typically covers equipment placement, refrigerant or gas connections, condensate drainage, thermostat setup, system evacuation where applicable, startup checks, and homeowner instructions. The quote should state who handles permits and inspection scheduling.
Local rates vary with wages, licensing, insurance, and season. A planning range of $75-$150 per technician hour is useful, but many HVAC firms price a complete replacement rather than bill hourly. Emergency or expedited work can add $300-$1,500, particularly during a heat wave or cold snap when crews are booked. Scheduling during a milder period may improve availability, but it does not guarantee a lower quote.
Three Lennox replacement quotes for different homes
These examples show how size and scope affect the total. They assume ordinary access and standard installation conditions; they are not Costco’s published rates or offers. Actual quotes depend on local labor, selected Lennox models, code requirements, and the contractor’s written scope.
| Example project | Equipment and scope | Labor estimate | Installed total | Approximate cost per ton |
|---|---|---|---|---|
| Small home replacement | 2-ton single-stage AC and 80% AFUE furnace; reuse sound ducts | 2 technicians for 8-10 hours | $7,500-$9,500 | $3,750-$4,750 per ton |
| Mid-size home replacement | 3-ton AC and 96% AFUE furnace; new coil, thermostat, minor transition work | 2-3 technicians for 9-12 hours | $10,000-$13,500 | $3,333-$4,500 per ton |
| Large home efficiency upgrade | 4-ton two-stage AC and high-efficiency furnace; vent and return-air changes | 3 technicians for 12-16 hours | $14,000-$19,000 | $3,500-$4,750 per ton |
The equipment configuration and work scope explain more than the brand name alone. The smallest example assumes no duct replacement and no major electrical changes. The larger project includes added installation work, and a variable-capacity system or extensive duct redesign could exceed the displayed high range.
To evaluate a bid, compare model numbers, capacity, SEER2 and AFUE ratings, thermostat, included permits, warranty registration, and labor coverage. Confirm whether the quote includes old-equipment removal and any Costco promotion. A quote with a lower total may omit items that appear on another contractor’s estimate.
Ways to lower a Costco Lennox quote without cutting corners
Keep the project scope focused on proven needs. If the furnace is in good condition and compatible with a new coil, replacing only the failing AC may cost $4,500-$12,500 instead of buying both systems at once. A contractor should confirm equipment compatibility and remaining service life; pairing mismatched or aging components can create warranty or performance problems.
Choose the least complex system that meets the home’s documented load and comfort needs. A single-stage system may cost thousands less than a variable-capacity package. Before paying extra for premium controls or the highest available efficiency, compare estimated annual energy savings with the added purchase price and expected years of ownership.
Ask for separate optional prices for duct sealing, air purification, zoning, extended warranties, and upgraded thermostats. These can be useful in specific homes, but they are not automatically necessary for a standard replacement. Preserve essential startup, safety, and code work rather than eliminating them to reach a target budget.
Prepare access to the furnace, attic, or outdoor unit before installation, and remove stored items that obstruct the work area. This will not erase the equipment cost, but it can reduce delays and avoidable labor. Request three itemized bids using the same equipment specifications and ask each contractor to explain any large difference in labor or accessory charges.
Finally, verify the current Costco offer before committing and compare the net price against non-Costco bids. A Shop Card has value only if its terms fit the purchase and the quote remains competitive. Check manufacturer and utility incentives separately, since eligibility can depend on model, efficiency rating, installation date, and location.
Rebates, warranty coverage, and five-year ownership costs
Potential rebates can reduce the effective price, but availability changes by location and program. Utility incentives may range from about $100 to more than $1,000 for qualifying high-efficiency equipment. Federal, state, or local tax rules can change, so buyers should verify current eligibility, required efficiency thresholds, income limits, and filing rules before including any credit in the budget.
Do not subtract a rebate from the quote until eligibility and timing are confirmed. Some incentives require preapproval, specific model numbers, a participating installer, or proof of an eligible installation. A contractor can supply model documentation, but the homeowner should confirm program terms directly with the relevant agency or utility.
Lennox manufacturer warranties and contractor labor warranties are separate. Parts coverage generally depends on registration, product, and terms; labor coverage is set by the installing company. Ask for warranty duration, registration deadline, exclusions, service-call charges, and whether a future repair requires an approved dealer. An extended labor plan might cost $300-$1,500, depending on coverage and term.
For a five-year budget, include purchase price, expected maintenance, and possible repairs rather than energy savings alone. Routine professional maintenance commonly costs $150-$350 per year for one system, with separate fees for repairs or parts. A $11,000 system plus five annual visits at $150-$350 gives a basic five-year outlay of about $11,750-$12,750 before repairs, financing, rebates, or utility savings. Energy use varies too much by climate and household to guarantee a payback period.