How much does a central air conditioner cost?
A central air conditioner costs $3,800 to $11,000 installed for most homes in 2026, with the average job around $6,500. That price is for a standard split system: the outdoor condenser, a matched indoor coil, refrigerant, line work, electrical, permits, and labor, installed on ductwork you already have. A ductless or brand-new-duct job is a different number, covered below.
The sticker you see online for equipment only ($1,800 to $4,000 for a condenser and coil) is not what you pay, because installation is roughly 40% to 60% of the total bill. Refrigerant charging and mains wiring are licensed work, so a DIY box off a website still needs a pro to commission it and usually voids the warranty if you self-install. Get three written quotes. On the same house with the same equipment, bids routinely differ by $2,000 or more, so shopping is the single easiest way to save.
How much does central AC cost by tonnage?
Tonnage is the cooling capacity of the system, where one ton equals 12,000 BTU per hour, and each step up adds equipment and refrigerant cost. Here are typical installed prices for a mid-efficiency split system replacing an existing one:
1.5 ton: $3,500 to $6,000. 2 ton: $3,800 to $6,500. 2.5 ton: $4,300 to $7,200. 3 ton: $4,800 to $8,000. 3.5 ton: $5,200 to $8,800. 4 ton: $5,800 to $9,500. 5 ton: $6,500 to $11,000. A 3-ton unit is the most common size sold for an average single-family home.
Do not shop by tonnage alone, and do not let anyone size the unit off square footage with a rule of thumb. An oversized AC short-cycles, cools unevenly, and leaves humidity behind, so a too-big system actually feels worse and wears out faster. Get the size right with the BTU calculator for a fast ballpark, then have the contractor confirm it with a full Manual J load calculation before they order anything.
How much does central AC cost by brand?
Brand shifts the installed price by roughly $2,000 to $4,000 for the same size, and it breaks into three honest tiers. Value brands (Goodman, Amana) run about $4,500 to $7,500 installed for a typical 3-ton job. Mid-tier brands (Rheem, Bryant, York) run about $5,000 to $8,500. Premium brands (Trane, Carrier, Lennox) run about $6,500 to $10,500, and a premium variable-speed system can top $12,500.
The catch is that many of these badges are the same equipment. Goodman and Amana are both Daikin, Bryant is Carrier, and York, Coleman, and Luxaire are all Johnson Controls. You are often paying for the nameplate and the dealer network, not a fundamentally different machine. See best central AC brands for the full tier list and which names share a factory.
The bigger truth: the installer matters more than the brand. A mid-tier unit sized correctly, charged to spec, and sealed into good ductwork will outrun a premium unit that was rushed. Spend your energy vetting the contractor, not chasing a logo.
How much does it cost to install central AC in a 1500 or 2000 sq ft house?
Expect roughly $4,500 to $8,000 for a 1500 sq ft home and $5,500 to $9,500 for a 2000 sq ft home, assuming usable ductwork is already in place. Bigger homes need more tons, and the price tracks the tonnage table above. Those figures are for a like-for-like replacement, which is why house size lines up with cost so cleanly.
Home size is a rough cost guide, not a sizing method. Two 2000 sq ft houses can need different systems depending on climate, insulation, ceiling height, window area, and sun exposure, so never buy off square footage. Run the BTU calculator and confirm with a Manual J before you commit to a size.
Adding central air to a house that has no ductwork is a much bigger project. New ducts add $3,000 to $8,000 on top of the equipment, so a full from-scratch central AC install commonly runs $8,000 to $16,000 or more. In a home with no ducts, a mini split vs central air comparison is worth running first, because ductless can be cheaper and less invasive.
What drives the installed price up or down?
Efficiency is the first lever. SEER2 measures how much cooling you get per watt, and the federal minimum is now SEER2 13.4 in northern states and 14.3 in the South and Southwest. A baseline unit is cheapest up front; stepping to SEER2 16 to 17 adds $1,000 to $2,500, and a premium SEER2 18-plus variable-speed system can add $3,000 or more. In a hot climate the mid-tier upgrade usually pays back in lower bills within several seasons; in a mild climate the cheapest compliant unit is often the smarter buy. See what is a good SEER rating to decide.
The rest of the bill is the stuff around the box. Common add-ons: new or repaired ductwork ($1,000 to $5,000 if yours leaks or is undersized, covered in ductwork repair and replacement cost), a new line set ($300 to $800), electrical or a new disconnect ($150 to $1,500), a thermostat ($100 to $500), and permits and inspection ($100 to $500). Region matters too: dense metros with high labor rates and strict permitting push jobs toward the top of the range.
One more accuracy note on refrigerant. If your old lines carried R-22, moving to a modern R-410A or R-454B system can force a full line-set replacement, which adds cost. As of 2025 the industry is transitioning to R-454B for new equipment, so ask which refrigerant a quoted system uses and what parts you have to replace to run it.
How can you pay less for central AC?
Get three itemized quotes and buy in the shoulder season. Because bids on the same job vary by $2,000 or more, three written, line-by-line quotes are worth an afternoon of calls. Buying in spring or fall (not the July or January rush) gives contractors slower-season pricing and more room to negotiate.
Check for money you do not have to chase down. The federal 25C tax credit expired for systems placed in service after December 31, 2025, so a 2026 install does not get that federal credit, but many state and utility rebate programs still pay several hundred to over a thousand dollars for efficient equipment. Look up your state and local utility incentives before you sign.
Finally, be honest about repair versus replace. If your unit is under about 10 years old and the fix is minor, repair and keep the system. Once it is past 12 years, uses R-22, or needs a repair over about half the cost of a new unit, replacement wins. Work the numbers with how much does AC repair cost, and if you are weighing heating too, read heat pump vs air conditioner. For the full picture across every AC type, see how much does a new AC cost.
Frequently asked questions
What is the average price for a central air conditioner?
The average central air conditioner costs about $6,500 installed in 2026, within a typical range of $3,800 to $11,000 for a standard split system on existing ductwork. The equipment alone is $1,800 to $4,000; professional install (refrigerant charging, electrical, permits, and labor) makes up the rest.
How much does it cost to install central AC in a 2000 sq ft house?
Budget roughly $5,500 to $9,500 installed for a 2000 sq ft home that already has usable ductwork. If the house has no ducts, a from-scratch central AC and duct install runs $8,000 to $16,000 or more. Do not size the system off square footage alone; use the BTU calculator and a Manual J to get the tonnage right.
What is the $5,000 rule for HVAC?
The $5,000 rule is a quick repair-versus-replace test: multiply the repair quote by the age of the unit in years. If the result is over $5,000, replace the system; if it is under, repair it. A $400 repair on a 12-year-old unit ($4,800) leans toward repair, while the same repair on a 15-year-old unit ($6,000) says replace. See how much does AC repair cost for the full method.
What are the top 3 AC brands?
The three most-recommended premium central AC brands are Trane, Carrier, and Lennox, known for build quality and dealer networks. Goodman and Amana are the strong value picks, and Rheem, Bryant, and York sit in the middle. Remember that a correct install from a good contractor matters more than the badge on the box.
How often should a central air unit be replaced?
A well-installed and maintained central AC lasts about 12 to 17 years, and many run 20 years in mild climates. Plan to replace it once it is past 12 years and starts needing repairs that cost more than about half the price of a new system, or if it still runs on discontinued R-22 refrigerant.