A Lennox SL28XCV air conditioner typically costs about $11,000-$17,000 installed, with an average near $14,000 for a straightforward replacement. The final price depends on system size, local labor, indoor coil compatibility, ductwork, electrical work, and whether the quote includes a furnace or air handler.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed SL28XCV system | $11,000 | $14,000 | $17,000 | Typical single-system replacement with standard access |
| Outdoor condenser equipment | $6,000 | $8,000 | $10,000 | Equipment-only estimate; configuration and dealer pricing vary |
| Installation labor | $2,000 | $3,500 | $5,500 | Removal, setup, refrigerant work, and commissioning |
| Installed cost per ton | $3,700 | $4,700 | $5,700 | Approximate comparison for a 3- to 4-ton project |
Assumptions: U.S. pricing for a premium variable-capacity central AC replacement with compatible indoor equipment and no major duct reconstruction. Local quotes and system configurations can fall outside these ranges.
Installed Lennox SL28XCV Prices for a Typical Home
Most homeowners should budget $11,000-$17,000 for the air conditioner installed, not just the outdoor unit. A basic replacement near the lower end usually involves a 3-ton system, accessible equipment, a compatible indoor coil, and limited changes to existing electrical or refrigerant lines. A 4- or 5-ton installation, difficult access, or required indoor-unit work can move the quote higher.
The SL28XCV is a premium, variable-capacity central air conditioner. Its equipment price is higher than that of many single-stage models, and the installation requires accurate setup rather than a simple condenser swap. The total estimate may include the outdoor unit, indoor coil or air handler, refrigerant piping adjustments, labor, startup testing, and haul-away of old equipment.
For budgeting, a 3-ton installed system may land around $11,000-$15,000, while a 4-ton system may be closer to $13,000-$18,000. Those are planning ranges, not fixed model prices. The correct capacity should come from a load calculation based on the house, rather than square footage alone.
Confirm whether the quote covers only cooling equipment or also a furnace, air handler, thermostat, and duct modifications. Replacing a furnace at the same time can add several thousand dollars, depending on equipment type and venting requirements. Assumptions: Standard residential installation, existing central duct system, and ordinary removal conditions.
What the Condenser, Coil, and Labor Add to the Quote
The outdoor condenser is only one part of the installed price; indoor compatibility and commissioning can account for a substantial share. Ask the contractor to itemize equipment and work, since bundled proposals can make it difficult to compare similar SL28XCV quotes.
| Quote component | Typical range | What it covers | Common price trigger |
|---|---|---|---|
| Outdoor SL28XCV unit | $6,000-$10,000 | Variable-capacity condenser | Capacity, dealer pricing, and availability |
| Indoor coil or air handler | $1,500-$4,000 | Matching indoor cooling component | Replacement or compatibility requirements |
| Labor and commissioning | $2,000-$5,500 | Removal, installation, refrigerant work, and startup | Crew time and site access |
| Electrical and line-set work | $300-$2,000 | Disconnect, wiring, piping adjustments | Outdated wiring or long, damaged lines |
| Permit and disposal | $100-$700 | Local permit and old-unit removal | Municipal fees and disposal rules |
These components are approximate and may overlap in a contractor’s package. A quote may also include a communicating thermostat, surge protection, a pad, condensate work, or a warranty plan. Check whether sales tax and permit fees are included, and whether the contractor specifies the indoor model numbers that will be paired with the condenser.
Installation labor varies by market, but a rough planning rate for HVAC work is $75-$150 per technician-hour. A two-person crew working a full day can accumulate 16 labor-hours before accounting for setup and travel. A line-item quote should show enough detail to distinguish labor from equipment and optional upgrades.
How Tonnage, Ductwork, and Electrical Scope Shift the Price
Capacity and existing-system condition are among the strongest price drivers, but larger tonnage is not automatically the right choice. In many U.S. homes, central AC capacity falls around 2-5 tons; each added ton can increase equipment and installation costs by roughly $800-$1,800, depending on the selected configuration and other work. A contractor should size the system from a load calculation, not simply match the old unit.
With the SL28XCV, the matched indoor equipment and controls matter. A compatible coil or air handler may limit extra work, while replacing an indoor component can add approximately $1,500-$4,000. If a furnace is included in a full heating-and-cooling replacement, the project can rise by another $4,000-$9,000 or more, depending on furnace efficiency, venting, and installation details.
Duct condition can change both price and expected performance. Sealing accessible leaks may cost $300-$1,500; replacing substantial ductwork can add $2,000-$7,000 or more. A return duct that is undersized for a 4- or 5-ton system may need modification. Poor airflow, excessive static pressure, or incorrect refrigerant charge can undermine comfort and efficiency even when the equipment itself is premium.
Electrical scope is another variable. A new disconnect or short wiring correction may add a few hundred dollars, while a longer circuit, panel work, or difficult conduit route can cost $500-$2,000 or more. A long refrigerant line set, commonly over 25-50 feet, may require additional material, labor, and manufacturer-specific installation steps. Ask for the assumed tonnage, indoor model, line-set length, and included duct or electrical work in writing.
How Midwest and Coastal Quotes Compare
Regional labor rates and contractor demand can shift an SL28XCV installation by roughly 10%-25% from a comparable mid-market quote. A $14,000 project in a moderate-cost market could be about $12,600-$15,400 in a lower-cost area, or around $15,400-$17,500 in a high-cost metro, before unusual scope is added.
Large coastal cities and high-cost suburban markets often have higher technician wages, insurance expenses, permit charges, and operating costs. Dense urban access can add time for parking, stairs, equipment lifting, or scheduling. In some markets, however, multiple Lennox dealers and steady equipment supply can make it easier to compare proposals.
Midwestern and Southern markets may have competitive installation prices, but peak summer demand can tighten availability. Rural customers may see lower labor rates but higher travel, delivery, or minimum-service charges. In colder regions, a quote that includes a furnace or dual-fuel system should not be compared directly with an AC-only proposal.
Use local bids rather than applying a national average mechanically. Request at least three written quotes for the same system capacity, indoor equipment, thermostat, permit scope, and warranty. A difference of several thousand dollars can reflect different project scopes rather than a simple markup.
How Long Installation Takes and What Labor Includes
A straightforward condenser-and-coil replacement often takes one working day, while a broader system change can take two or more days. A typical crew of two or three technicians may spend 8-12 hours removing the old equipment, setting the new unit, making connections, evacuating and charging the system, and checking operation.
Labor time increases if the indoor coil is difficult to reach, the furnace or air handler must be replaced, or the installation requires duct, electrical, condensate, or refrigerant-line changes. A crane lift, roof access, tight mechanical closet, or long equipment carry can add crew hours and specialized charges. Ask whether the contractor includes startup and performance testing in the labor line.
Variable-capacity equipment makes commissioning especially important. The installer should follow Lennox’s requirements for the selected combination, verify airflow and refrigerant charge, and configure controls correctly. A bid that is substantially cheaper because it omits testing or assumes a quick condenser-only swap may not represent equivalent work.
Scheduling may take longer during the hottest weeks, when repair calls compete with planned installations. An urgent replacement can bring a rush charge or limit equipment choices. If the existing system still runs, arranging estimates before peak season can provide more flexibility and time to verify the scope.
Which Add-Ons Can Raise the Lennox SL28XCV Bill?
Optional work should be separated from required installation so the buyer can judge each charge on its own. A communicating thermostat or control upgrade may cost about $300-$1,000 installed if it is not included. Confirm whether the quoted control is required for the proposed system configuration or is an optional convenience feature.
Common additional charges include a new outdoor pad at $100-$400, condensate pump or drain corrections at $150-$600, and refrigerant line-set replacement at roughly $500-$2,000. Surge protection may add $200-$600, while duct sealing and balancing can range from $300-$1,500. Roof access, crane service, or difficult removal can add several hundred to more than $1,500 based on site and equipment needs.
Old-unit removal is sometimes bundled into installation, but disposal charges may appear separately at around $100-$400. Permits typically cost about $50-$300, though local requirements can be higher. Ask whether the contractor will handle inspections and correct any code issues discovered during the work.
Extended labor coverage can add roughly $300-$1,500 depending on term and coverage. Review exclusions, transferability, and whether annual maintenance is required. Manufacturer equipment coverage and contractor labor coverage are different; the written proposal should state the registration deadline and who handles warranty service.
Repairing an Existing System Versus Replacing It
A repair is often less expensive when the SL28XCV system is relatively new and the fault is isolated, but a major component failure can change the calculation. Diagnostic visits commonly cost $100-$250, sometimes credited toward approved work. A capacitor or contactor replacement may run $150-$500, while a fan motor repair can reach $400-$1,200.
Refrigerant leak diagnosis and repair can cost about $500-$2,000 or more, depending on access and the location of the leak. Compressor replacement may reach $2,000-$5,000, and parts availability or warranty status can affect the out-of-pocket amount. Get a written repair quote that distinguishes diagnosis, parts, refrigerant, and labor.
Compare a major repair with the installed replacement quote, the age and condition of the whole system, and likely future repairs. If the unit is older, has repeated failures, or needs an expensive compressor, paying for another repair may not make sense. If it is still under applicable parts coverage and the rest of the equipment is sound, repair may be more economical.
The SL28XCV’s premium efficiency and variable capacity do not guarantee a specific payback period. Savings depend on the old system’s efficiency, climate, electricity rates, thermostat settings, and installation quality. Ask for an estimate using the home’s actual usage and utility rates instead of relying on a generic savings claim.
Where Buyers Can Trim the Installation Quote
The most reliable savings come from comparing equivalent scopes and declining work that is not justified by the home’s needs. Get three itemized bids that identify condenser and indoor-unit model numbers, capacity, thermostat, permits, disposal, labor, and warranty. A low headline price may exclude the coil, electrical changes, or commissioning that another proposal includes.
Keep the existing furnace or air handler if it is compatible, in good condition, and does not require replacement to meet the proposed system requirements. Do not replace ductwork solely because it is old; ask for airflow, leakage, or static-pressure findings that support the recommendation. Conversely, avoiding necessary airflow corrections can reduce comfort and system performance.
Ask the contractor to price required work separately from optional accessories, extended coverage, and convenience upgrades. A standard control may be sufficient if it supports the chosen configuration. Review the written equipment match and warranty requirements before declining any item described as necessary.
Scheduling outside the hottest demand period may improve appointment availability and allow more time to compare bids, although equipment discounts are not guaranteed. Clear the work area, arrange access, and share known electrical or duct issues before installation day. Avoid choosing a lower price if it removes permit handling, proper startup testing, or qualified installation labor.
Before signing, confirm the total in writing, the payment schedule, change-order process, and what happens if hidden damage is found. The most useful comparison is the complete installed price for the same equipment configuration and scope, not the condenser price alone.