A ducted split system typically costs $8,000-$18,000 installed when the project includes indoor and outdoor equipment plus standard ductwork; replacing equipment while reusing sound ducts often costs less. Home size, system capacity, duct condition, efficiency, electrical work, and local labor rates drive the final quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Equipment replacement with existing ducts | $5,000 | $8,500 | $13,000 | Typical 2- to 4-ton split system |
| New ducted split system installation | $8,000 | $14,000 | $25,000 | Equipment, labor, and typical ductwork |
| New ductwork only | $2,000 | $5,500 | $12,000 | Depends on access and home layout |
| Installed system per ton | $2,500 | $4,000 | $6,500 | Broad planning range, not a capacity-only quote |
What a ducted split system costs with standard installation
A split duct system has an outdoor condenser or heat-pump unit connected to an indoor coil and air handler or furnace. The two main pieces of equipment are split between indoor and outdoor locations, while ducts distribute conditioned air throughout the house. This is different from a ductless mini-split, which delivers air directly from wall-mounted indoor heads.
For a home with usable ducts, a typical installed replacement falls near $6,500-$11,000. A complete installation with new duct runs commonly lands around $10,000-$18,000. High quotes may reach $20,000-$25,000 when the house needs extensive duct construction, electrical upgrades, premium equipment, or difficult attic or crawlspace work.
A 2-ton system may suit a smaller, well-insulated home, while many larger homes need 3-5 tons; actual sizing requires a load calculation rather than a simple square-foot rule. Equipment efficiency, heating type, and climate also affect the price. Assumptions: U.S. mid-market labor rates, standard central equipment, ordinary access, and no major structural or electrical corrections.
How equipment, ductwork, and labor shape the quote
Quotes may bundle equipment and installation, so a line-item estimate makes it easier to compare contractors. The following ranges are typical planning figures; overlapping scopes and local pricing can shift the total.
| Quote component | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Outdoor unit and indoor coil or air handler | $3,000 | $5,500 | $9,000 | Equipment package, 2-5 tons |
| Duct installation or replacement | $2,000 | $5,500 | $12,000 | $15-$40 per sq ft of conditioned floor area in some projects |
| Installation labor | $1,500 | $3,000 | $5,500 | Typically 15-35 crew hours |
| Electrical, drain, and line-set work | $300 | $1,200 | $3,000 | Reuse versus replacement affects cost |
| Permit, startup, and disposal | $150 | $600 | $1,500 | Local fees and old-equipment removal |
Ductwork prices vary widely because a short, accessible run is not comparable to a full redesign through finished ceilings. Some contractors price duct replacement by home area, while others quote by run, register, or job scope. Confirm whether the quote includes return ducts, sealing, insulation, balancing, thermostat, condensate drain, refrigerant lines, and removal of the old system.
Labor is often the largest variable after equipment and duct scope. A useful comparison is , but the crew’s quoted price can also include supervision, tools, insurance, and warranty administration. Ask whether startup testing and airflow balancing are included rather than assuming they are part of installation.
Which tonnage and duct length change the price most?
System size has a direct effect on equipment cost, but oversizing is not a reliable shortcut to faster comfort. A correctly sized system depends on insulation, windows, air leakage, orientation, ceiling height, and local design temperatures. A contractor should calculate heating and cooling loads and explain the selected capacity.
Moving from a 2-ton to a 4-ton system can add roughly $1,000-$3,000 in equipment and installation cost. The difference can be greater when the larger unit requires a bigger coil, air handler, electrical circuit, line set, or duct modifications. Higher capacity can also mean higher operating costs and less effective humidity control if the system cycles too frequently.
Duct length and location matter as much as total floor area. Replacing 100-200 linear feet of accessible duct in an unfinished basement may cost around $2,000-$5,000; difficult attic or crawlspace work, damaged framing, or sealed finished walls can push duct costs above $8,000. Undersized returns or long, restrictive supply runs may require changes even if the ducts appear intact.
Efficiency and equipment type create another price step. A standard-efficiency central air conditioner generally costs less than a premium variable-speed heat pump. A higher SEER2 rating, two-stage compressor, communicating controls, or cold-climate heat-pump design can add several hundred to a few thousand dollars. Compare the equipment’s exact model numbers and included controls, not just a marketing tier.
Why regional labor and attic access shift installed prices
Local labor markets and building conditions can move installed prices substantially. Dense metropolitan areas and regions with high contractor demand often quote 10%-25% above mid-market estimates. Rural locations may have lower labor rates but higher travel, delivery, or scheduling charges. Coastal and hot-weather markets can also see higher seasonal demand for cooling equipment.
Access can add more than a modest regional price difference. An air handler in an open basement is usually easier to replace than one in a cramped attic with a narrow hatch. Difficult access can add $500-$2,000 or more through extra labor, protective work, lifting equipment, or a second technician. A long refrigerant line between indoor and outdoor units may add roughly $10-$25 per extra linear foot, depending on materials and installation conditions.
Prices also depend on whether the home already has a compatible electrical circuit, condensate drain, thermostat wiring, and outdoor equipment pad. A new circuit or panel work can add $500-$2,500, while a simple disconnect or drain correction may cost much less. These are not universal add-ons: the contractor should identify the existing condition and specify the proposed correction in writing.
How many crew hours does a replacement usually take?
Replacing equipment while keeping compatible ducts typically takes one workday, or about 8-14 crew hours for a straightforward job. A full system installation with duct modifications often takes 2-4 days and around 20-40 crew hours. Projects involving concealed duct runs, structural access, or electrical upgrades can take longer and may require separate trades.
Labor rates vary by location and company. HVAC technician billing rates commonly fall around $75-$150 per hour, though installed project pricing is generally quoted as a total rather than strictly billed by the hour. Emergency or after-hours service can carry a separate dispatch fee or premium; a planned replacement usually avoids that urgency charge.
Ask for the work schedule and completion tests, not just a labor line. The estimate should clarify whether the crew will remove and dispose of old equipment, protect floors, pressure-test refrigerant piping, evacuate the system, verify charge, test heating and cooling, and balance airflow. If duct sealing or insulation is included, request the areas and performance standard covered.
Which extras add removal, electrical, and permit charges?
Old equipment disposal may cost $100-$400 if it is not included in the installation price. Refrigerant recovery is generally part of compliant equipment removal, but the estimate should say so. New refrigerant lines, condensate pumps, vibration pads, surge protection, or a smart thermostat may be added when needed or requested.
Permit and inspection fees often range from $100-$500 for a straightforward residential replacement, though some jurisdictions charge more or require additional mechanical or electrical permits. Code updates can increase the project price if the installation reveals an outdated disconnect, unsafe wiring, inadequate condensate management, or other noncompliant conditions.
Get optional upgrades separated from required corrections. A quote should distinguish necessary safety or code work from convenience upgrades such as a premium thermostat or extra filtration. Duct sealing may cost $500-$2,000 for a typical accessible system, while comprehensive duct replacement is a much larger scope. Ask whether the work includes measured leakage or airflow checks.
Warranty terms affect long-run value, but a longer parts warranty may require product registration or documented maintenance. Labor coverage can be separate from the manufacturer’s equipment warranty. Compare the duration, exclusions, and any annual service requirements; do not assume that all bids include equivalent coverage.
Three home scenarios show how quotes can differ
A 1,400-square-foot ranch with an existing 2-ton system, accessible ducts, and a basic air conditioner might receive a $6,000-$9,000 replacement quote. That assumes the ducts, electrical circuit, thermostat wiring, and outdoor pad can be reused. A new filter cabinet or small drain correction could add $200-$700.
A 2,000-square-foot home needing new ducts can land near $12,000-$19,000. For example, a 3-ton heat pump package at $6,000-$9,000, 150 linear feet of ductwork at an effective $25-$45 per foot, and $2,500-$4,000 of labor and finishing can produce a total around $12,000-$20,000. Actual duct rates depend heavily on accessibility and whether runs are concealed.
A 2,800-square-foot, two-story home with a 4-ton variable-speed heat pump, attic duct redesign, and an electrical upgrade may cost $18,000-$25,000 or more. A realistic bid should detail the equipment, zoning or controls, duct changes, circuit work, permits, and commissioning. If the existing system serves the home adequately, a repair or partial replacement may be a lower-cost alternative, depending on equipment age and the failure.
These examples are not fixed national tariffs. They illustrate why a low equipment price does not necessarily mean a low installed total: duct scope, access, and required corrections can account for thousands of dollars.
Should the old ducts be repaired or replaced?
Sound, correctly sized ducts can often stay in place during equipment replacement. Cleaning or sealing may be sufficient when the duct system is structurally intact, properly insulated, and reasonably balanced. A targeted repair may cost $300-$1,500, compared with several thousand dollars for extensive replacement.
Replacing ducts makes more financial sense when damage or poor design undermines comfort. Signs include disconnected runs, crushed flex duct, major leakage, inadequate returns, condensation, or rooms that remain difficult to heat or cool. A contractor should inspect the system and identify the specific problem before recommending wholesale replacement.
Repairing an older unit can also be cheaper than replacing it, but the decision depends on the failure, equipment age, refrigerant, parts availability, and likely future repairs. A $300-$1,200 repair may be reasonable for a younger system with a limited fault. A compressor or coil repair can reach $1,500-$4,000, making replacement more competitive when the system is old or other components are deteriorating.
How can a homeowner lower the ducted-system quote?
Keep the project scope focused. If the existing ducts pass inspection, ask for a replacement option that reuses them, alongside a separate price for sealing or targeted repairs. Avoid buying extra capacity without a load calculation, and compare standard, two-stage, and variable-speed models based on the home’s needs rather than assuming the highest tier is necessary.
Compare at least three written bids with matching equipment and scope. Check model numbers, tonnage, efficiency, thermostat, duct work, permits, disposal, warranty, and startup testing. A quote that is $2,000 lower may exclude duct corrections or electrical work that another contractor included. Request an itemized allowance for unknown conditions so that a change order can be evaluated before work begins.
Scheduling a non-emergency installation during a contractor’s less-busy period may improve availability, though discounts vary and are not guaranteed. Preparing clear access to the indoor unit, attic hatch, and outdoor condenser can reduce delays. Bundling necessary electrical or duct work may avoid duplicate trips, but only when the combined scope is specified and priced transparently.
Finally, check local utility programs and tax rules before choosing equipment. Incentives vary by location, equipment efficiency, and installation date, and some require approved models or contractor documentation. Treat rebates as a possible reduction rather than subtracting them from the upfront quote until eligibility and application requirements are confirmed.