Central Air Conditioner Cost (2026 Prices)

By HomeCost Guide · Updated October 2026 · Rough midpoint of HomeAdvisor's $3,900–$7,900 range for central AC replacement with existing ductwork

A new central air conditioner costs $3,900 to $7,900 installed for a standard replacement, with about $5,900 as a rough midpoint (HomeAdvisor). That covers the outdoor condenser, indoor evaporator coil, refrigerant lineset, labor, permits, and disposal — assuming existing ductwork. But AC pricing has two independent axes: tonnage (capacity) and SEER2 (efficiency). A 2-ton minimum-efficiency unit and a 5-ton premium variable-speed unit are both 'a new central AC' in entirely different price universes.

This guide breaks cost down both ways: installed prices by tonnage from 1.5 to 5 tons, the real steps between SEER2 tiers (a 3-ton 22 SEER costs ~2.7x a 14.3 SEER), and what actually moves your quote — coil and blower compatibility, electrical, condensate, ductwork, and refrigerant conversions. This guide breaks AC cost down both ways: installed prices by tonnage from 1.5 to 5 tons, the real price steps between SEER2 tiers, and the factors that actually move your quote — compatibility, electrical, drainage, ductwork, and refrigerant.

1. Central Air Conditioner Cost (2026 Prices) cost breakdown

Angi's per-tonnage figures ($1,300–$6,800) lean toward equipment-ish pricing; HomeAdvisor's $3,900–$7,900 reflects full installed replacement. Use Angi's table for the relative step between sizes (each half-ton adds ~$200–$600) and HomeAdvisor's range as installed reality. Efficiency tier, not tonnage, creates the biggest price jumps.

Where the money goes: labor vs materials vs fees

• Labor$1,000–$2,500Condenser set, lineset run or flushed, coil mounted, system evacuated and charged. Difficult placements add hours.
• Equipment$1,300–$6,800Outdoor condenser + indoor coil. SEER2 tier is the main lever: minimum to premium spans ~2.5x on equipment.
• Permits & fees$250–$800Electrical permit for the 240V circuit plus mechanical permit; some cities add refrigerant-handling inspection.
• Removal & recovery$200–$600Old condenser/coil haul-away plus federally required refrigerant recovery. R-22 systems cost more to decommission.

Sources: HomeAdvisor, Angi, USA Today, Atlas AC Repair (contractor cost data). Figures are national averages compiled from published industry data; your price will vary by home and location.

2. Signs your central AC needs replacing

Signs your central AC needs replacing

• 12–15+ years old with a failing compressor. Compressor replacement ($1,500–$2,500+) on an old unit is the classic replace trigger.
• Still runs on R-22. Recharges at $100–$150+/pound; any major repair funds obsolete technology.
• Cooling bills up 20%+ with no rate increase. Aging compressor and fouled coils; the gap to modern 16 SEER2 widens yearly.
• Cools but can't dehumidify — clammy at 72°F. Lost latent capacity is a staging/sizing problem repairs don't fix.
• Recurring refrigerant leaks after repair. Each recharge $200–$600+ and the leak always returns.

3. How a central AC replacement works

How a central AC replacement works

1. Load calculation and selection. Manual J determines tonnage; climate, rates, and tenure set the SEER2 tier. Coil/blower compatibility and lineset reuse get assessed — the decisions defining real project cost.
2. Removal and recovery. Power off, refrigerant recovered per EPA rules, old condenser/coil/lineset out. New pad leveled and set.
3. Coil, lineset, electrical. Coil mounted on furnace/air handler with new condensate drain and overflow switch. Lineset run or flushed; 240V disconnect wired.
4. Set, evacuation, charging. Condenser set, lines brazed, system evacuated with a vacuum pump — the reliability-critical step — then charged to manufacturer spec.
5. Startup and inspection. Charge verified (superheat/subcooling), airflow measured, drain and safety switch tested, thermostat programmed. Permit inspection closes the job.

4. What affects the cost

Tonnage and the oversizing trap

One ton removes 12,000 BTUs/hour. The 1-ton-per-500–600-sq-ft rule is only a starting point — insulation, ceiling height, windows, and climate shift it substantially. Each half-ton adds ~$500–$1,000 installed. The expensive mistake is oversizing: a too-big AC cools air in minutes but shuts off before removing humidity, leaving the house cold and clammy while short-cycling to an early death. Manual J is the only correct sizing method.

SEER2 tiers: what efficiency costs

SEER2 measures cooling per watt across a season. Minimums since 2023: 14.3 SEER2 South, 13.4 North. Each point above minimum cuts cooling electricity ~7%. The price steps are steep — installed 3-ton: 14.3 SEER ~$3,960, 16.5 SEER ~$6,544, 22 SEER ~$10,598 (contractor data). In Phoenix or Houston the premium pays back in 6–9 years; in Seattle it may never pay back. Size SEER to your cooling season.

Single-stage vs two-stage vs variable-speed

Single-stage (100% or off): cheapest, noisy, poor humidity control. Two-stage (~70% low): quieter, steadier, better dehumidification, ~$1,000–$2,000 more. Variable-speed: continuous modulation, most even temps, +$2,500–$4,500. Energy payback on staging alone is modest — buy staging for comfort and humidity, SEER for the electric bill. The comfort difference is real and immediately noticeable — but the energy payback on staging alone is modest, so buy staging for comfort and SEER for the electric bill.

Coil, blower compatibility, lineset

The coil must be AHRI-matched to the condenser — mismatches never hit rated SEER2 and can void warranties. Your furnace's blower must deliver the coil's required airflow: a 15-year-old single-speed blower often can't, turning an AC project into a furnace conversation. The lineset can usually be flushed and reused ($200–$400) unless the old system ran R-22 — then replace it ($500–$1,200) to avoid oil contamination.

Electrical, placement, noise

Every central AC needs a dedicated 240V circuit with a disconnect in sight of the condenser. Straight replacements already have it; first-time installs or big upsizes may need a new circuit ($300–$800) or panel upgrade ($1,200–$3,000). Placement matters: 2–3 feet clearance for airflow, level mounting, away from bedrooms — premium units run ~55 decibels vs 70+ for builder-grade. Long refrigerant line runs to distant condensers add $10–$20 per foot — another reason placement planning matters beyond noise.

Condensate drainage

A 3-ton AC pulls 5–20 gallons of water daily from humid air. Without a nearby floor drain, a condensate pump ($150–$300 installed) routes it out. Code in most areas requires an overflow safety switch ($75–$150) that shuts the system before water damages ceilings — cheap insurance against $5,000 of drywall damage. Attic air handlers are highest-risk; insist on a primary drain plus an auxiliary pan with its own switch.

Ductwork: cooling's bottleneck

Heating-designed ducts often fail at cooling: leaks waste more cooled air (bigger temperature differential), and undersized returns starve the coil — freezing it solid. Symptoms: rooms that never get cold, July coil freeze-ups, constant running without keeping up. Sealing: $500–$1,500; targeted replacement: $1,000–$2,700. New condenser on bad ducts is the top cause of 'my new AC doesn't cool' callbacks. Test ducts before buying tons.

Refrigerant: R-22 phase-out

R-22 (phased out) recharges cost $100–$150+/pound when available — any major repair on an R-22 system funds obsolete technology. Modern R-410A/R-454B systems need a full lineset flush or replacement on conversion ($300–$800 extra) because residual mineral oil contaminates the new refrigerant. Upside: new refrigerants transfer heat better, part of why modern minimum-efficiency units outperform 15-year-old 'high-efficiency' ones. The upside: new refrigerants run at higher pressures with better heat transfer, which is part of why modern minimum-efficiency units outperform 15-year-old premium ones.

5. Saving money & hiring right

Questions to ask your contractor

• Will you do a Manual J — what tonnage does it recommend versus my old unit?
• Are condenser and coil an AHRI-matched pair, and what's the rated SEER2?
• Can my blower deliver this coil's required airflow — verified, not assumed?
• Lineset: replace or flush — and for R-22, what's the conversion procedure?
• Are permits, electrical, disposal, and thermostat itemized in the quote?

6. How costs vary by state

AC costs track local labor; cooling demand sets the equipment tier. Planning ranges adjusting the $3,900–$7,900 band — local quotes are final.

7. Frequently asked questions