Buyers replacing or installing a 5-ton 18-SEER air conditioner typically pay between $6,500 and $14,000 total depending on equipment, ductwork, and region; the keyword cost appears here to match search intent. Major drivers are the outdoor unit brand, whether ducts need work, labor rates, and local permit requirements.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 5-Ton 18-SEER AC Unit Installed | $6,500 | $9,500 | $14,000 | Includes equipment, install labor; assumes standard single-family home, existing matched coil and compatible ducting. |
Total Cost to Install a 5-Ton 18-SEER AC Unit
Typical fully installed pricing ranges from $6,500-$14,000, with a realistic average of about $9,500 for standard replacement jobs.
Assumptions: 2,400–3,000 sq ft home, paired with existing furnace/coil, normal attic access, Midwest labor rates.
Equipment-only for a mid-range 18-SEER, 5-ton condensing unit: $3,500-$6,000; matched indoor coil/evaporator and condenser bundle raises equipment to $4,500-$7,500. Installation labor, refrigerant, and commissioning add $2,000-$6,000 depending on ductwork and electrical upgrades. Per-ton installed cost: $1,300-$2,800 per ton.
Materials, Labor, Equipment, Permits, and Disposal in a Typical Quote
Breaking the quote shows where the money goes and highlights where savings are possible.
| Materials | Labor | Equipment | Permits | Delivery/Disposal |
|---|---|---|---|---|
| $600-$1,500 (line set, pad, refrigerant, fittings) | $1,500-$4,000 | $3,500-$7,500 (condensing unit + coil) | $75-$400 (local) | $100-$600 (old unit disposal, hauling) |
How Ductwork Condition, Electrical, and Access Change the Final Price
Poor ducts, inadequate electrical service, or difficult roof/attic access can add $1,200-$6,000 to the baseline price.
Examples with numeric thresholds: duct sealing or partial replacement for 200–800 sq ft of duct runs: $800-$3,000; full duct replacement for 1,000+ sq ft of main runs: $3,000-$8,000. Electrical upgrades: 60A/70A subpanel or disconnect additions: $600-$2,000; a full service upgrade (100A→200A) adds $2,000-$6,000.
Specific Installation Variables That Drive Quotes
Two strong variables are refrigerant line length and required SEER matching, each with clear price thresholds.
Line set length: standard included up to 25–50 ft; runs of 50–150 ft add $150-$800 in material and labor; runs over 150 ft typically require custom line sizing and can add $800-$2,500. SEER and matched equipment: aftermarket or mismatched coils can void warranty and add $500-$2,000 for a proper matched coil or custom work.
Practical Ways To Reduce the Price of a 5-Ton 18-SEER Replacement
Scope control—replace only needed components, schedule off-season installs, and provide clear access—to lower quotes without compromising system life.
Strategies: accept a standard manufacturer model rather than premium features; bundle with planned HVAC services (furnace/coil) to get a package rate; prepare the site by clearing attic/roof access and labeling existing components; obtain 3 competitive quotes and request itemized bids to compare apples-to-apples.
How Prices Vary Across U.S. Regions and Climate Zones
Expect 10%–30% regional variation: higher in coastal and high-cost metro areas, lower in rural Midwest and parts of the South.
Approximate deltas versus national average: Northeast/West Coast +15%–30%; Southeast +5%–15%; Midwest -5%–10%. Cooling-dominant climates may charge more for higher-capacity installs and expedited summer scheduling.
Typical Job Time, Crew Size, and Labor Rates for a 5-Ton 18-SEER Install
A standard replacement uses a 2–3 person crew and typically takes 6–12 hours; labor rates commonly fall between $75-$125 per hour per tech.
Common timing: single-day swap for simple replacement (6–10 hours); complex jobs with ductwork or electrical upgrades expand to 1–3 days (10–24 hours total). Expect minimum service fees of $150-$400 on small jobs or diagnostic visits.
Three Real-World Quote Examples With Spec Details
Examples illustrate how specs and site conditions create the final total.
| Scenario | Specs | Labor Hours | Per-Ton | Total |
|---|---|---|---|---|
| Simple Swap | 5-ton 18-SEER, matched coil, existing ducts sound | 8 | $1,300/ton | $6,500-$7,500 |
| Standard Replace With Minor Duct Repair | 5-ton 18-SEER, coil, 300 sq ft duct sealing | 14 | $1,800/ton | $9,000-$10,500 |
| Full Upgrade With Electrical | 5-ton 18-SEER, new coil, partial duct replace, service upgrade | 20-30 | $2,200/ton | $12,000-$14,000+ |