A new central AC system typically costs $5,000-$12,000 installed, with many standard replacements landing near $8,500. The final price depends on system size, efficiency, ductwork, electrical work, equipment brand, and local labor rates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed central AC | $5,000 | $8,500 | $12,000 | Typical 2-5 ton replacement |
| Equipment only | $2,000 | $4,000 | $7,000 | Condenser and indoor coil |
| Installation labor | $1,500 | $3,000 | $5,000 | Standard access and connections |
| New ductwork | $2,000 | $4,500 | $10,000 | Whole-home installation can cost more |
What a standard 2- to 5-ton central AC installation costs
For a like-for-like replacement using existing, serviceable ducts, homeowners commonly pay $5,000-$12,000. A practical national planning figure is about $8,500 for equipment and installation. Smaller 2- to 3-ton systems may fall near $5,000-$8,000; 4- to 5-ton systems often run $7,500-$12,000, depending on efficiency and installation requirements.
That range assumes a typical single-family home, a standard split system, ordinary equipment access, and no major duct, electrical, or refrigerant-line repairs. New construction or a home without ducts can exceed $15,000 once distribution work is included. Assumptions: U.S. midmarket equipment, standard replacement, existing ducts in usable condition. For a straightforward replacement, budget roughly $6,000-$10,000 before unusual repairs or high-efficiency upgrades.
How equipment, labor, and removal shape the quote
Contractor estimates should distinguish the outdoor condenser, indoor evaporator coil, installation labor, and any site work. A low equipment price may not include a matched indoor coil, new refrigerant lines, thermostat, startup testing, or disposal of the old unit.
| Quote component | Low | Average | High | Typical scope |
|---|---|---|---|---|
| Condenser and indoor coil | $2,000 | $4,000 | $7,000 | Standard split-system equipment |
| Labor and commissioning | $1,500 | $3,000 | $5,000 | Removal, installation, testing |
| Line set or electrical updates | $300 | $900 | $2,500 | Repairs or code-related changes |
| Removal and disposal | $100 | $300 | $600 | Old equipment handling |
| Thermostat and accessories | $100 | $400 | $1,200 | Controls or condensate upgrades |
Costs overlap when contractors bundle equipment and labor, so these component ranges are not meant to be added mechanically. Installation labor commonly represents about 20%-35% of a standard replacement quote. A clear quote identifies included equipment, labor, removal, startup, and exclusions.
Why tonnage, SEER2 rating, and duct condition change prices
Central AC capacity is measured in tons, with one ton equal to 12,000 BTU per hour. A typical home may need 2-5 tons, but floor area alone does not determine the correct size. Insulation, window exposure, ceiling height, climate, and air leakage affect the load calculation. Oversizing can raise purchase cost and lead to short cycling, so capacity should be supported by a cooling-load assessment.
Efficiency also changes the estimate. Standard-efficiency equipment may cost less upfront, while higher-SEER2 models can add roughly $1,000-$3,500 or more, depending on capacity and features. Duct repairs can add $500-$2,500; extensive replacement may reach $2,000-$10,000. A jump from 3 to 5 tons or a duct system needing replacement can move a project well beyond the standard-installation range.
What labor time and regional rates mean for installation
A basic replacement usually takes a two-person crew about 6-10 hours. Converting a home to central air, relocating equipment, or correcting duct and electrical problems may require one to several additional days. Contractors may price labor as a project rather than publish an hourly rate; where billed by time, HVAC labor commonly runs about $75-$150 per hour per technician.
Prices also vary by market. Major coastal cities and other high-cost metro areas may run 10%-25% above national midmarket estimates. Lower-cost rural markets may be 5%-15% below them, although travel distance and limited contractor availability can erase the difference. Compare local installed quotes using the same tonnage, efficiency, and work scope—not just the equipment brand.
When ductwork, electrical work, or permits add expense
Replacing an existing system generally costs less than adding central AC to a home with no ducts. New ductwork commonly costs $2,000-$10,000, with size, number of floors, attic or crawlspace access, and finished-wall repairs affecting the total. Electrical upgrades may add $300-$2,500 if the circuit, disconnect, or panel needs changes.
Permit requirements and fees differ by city and county; a permit may cost about $50-$500, while required inspections or code corrections can add more. A condensate pump, new thermostat, refrigerant-line replacement, or difficult condenser placement may add $100-$1,500 per item or work group. Ask whether permits, inspections, line-set work, and old-unit disposal are included before comparing totals.
Three central AC quotes for common home scenarios
A quote is easier to evaluate when it states the capacity, efficiency, labor scope, and condition of the ducts. These examples illustrate typical installed pricing rather than guaranteed local rates.
| Scenario | System and labor | Estimated total |
|---|---|---|
| Smaller home replacement | 2.5 tons, standard efficiency, 7 labor hours, usable ducts | $5,500-$7,500 |
| Mid-size home replacement | 3.5 tons, mid-tier efficiency, 8-10 labor hours, minor line work | $7,500-$10,500 |
| Larger home with duct repairs | 5 tons, higher efficiency, 10-14 labor hours, duct and electrical work | $12,000-$18,000 |
Totals vary with labor rates, equipment availability, and required corrections. The third scenario is not a like-for-like replacement; added duct and electrical work accounts for much of the higher price.
How to lower the central AC price without cutting capacity
Request at least three written estimates with the same load-calculated tonnage, efficiency level, indoor coil, thermostat, and warranty terms. Ask contractors to separate required repairs from optional upgrades, and confirm whether the existing ductwork can be tested and reused rather than replaced automatically.
Keeping a properly sized system and choosing a moderate efficiency tier can control upfront cost. Scheduling outside peak summer demand may improve availability, though savings depend on local contractor workloads. Bundling heating and cooling work can sometimes reduce labor duplication, but only when both systems genuinely need service. Compare total installed price and included work, not a low equipment-only figure or an unnecessary size upgrade.