Find out AC unit costs for central air, mini split, and window units in 2026. Installation costs included. Free AC cost guide.
Air conditioner costs range from $150 for a window unit to $12,000+ for a whole-home central air system with installation. Mini-split systems have become increasingly popular — no ductwork required, highly efficient, and cost $3,000-$8,000 installed for a single zone. Our guide covers all AC types with real installed costs so you can choose the right solution for your budget.
Air conditioner cost ranges: Window unit (5,000-12,000 BTU): $150-$500 unit only — no installation. Portable AC: $300-$800 — no installation required. Mini-split single zone (9,000-18,000 BTU): $700-$2,000 equipment, $1,500-$4,000 installed total. Mini-split multi-zone (2-4 rooms): $2,000-$5,000 equipment, $4,000-$10,000 installed. Central AC unit only: $1,500-$3,500. Central AC installed (with existing ductwork): $3,500-$7,500. Central AC with new ductwork: $7,000-$15,000.
SEER ratings and efficiency: SEER 2 (new standard 2023): minimum efficiency rating. Higher SEER = lower operating cost. Annual cooling cost comparison for 2,000 sq ft home: SEER 14: $600-$900/year. SEER 18: $470-$700/year. SEER 22+: $380-$570/year. Mini-split advantage: SEER ratings often 20-30+, much more efficient than central air. Federal tax credit: 30% of cost for energy-efficient HVAC installed through 2032 under Inflation Reduction Act.
Central AC installation costs: Replace existing AC unit (ductwork intact): $3,500-$7,500 total. New system with existing ductwork: $4,000-$8,000. Complete new system with ductwork installation: $8,000-$17,000. Factors affecting cost: home size and tonnage required, accessibility of existing ductwork, SEER rating chosen, local labor rates. Get 3 quotes — prices vary $1,000-$3,000 for identical equipment.
Mini-split vs central air comparison: Mini-split advantages: no ductwork required (saves $3,000-$8,000), zone control (only cool occupied rooms), higher efficiency (SEER 20-30+), quieter operation. Central air advantages: lower cost if ductwork exists, cools entire home consistently, familiar technology, better for large homes. Best choice: mini-split for homes without ductwork or additions. Central air for homes with existing ductwork.
AC system lifespan: Central AC unit: 15-20 years average. Mini-split system: 15-25 years. Window unit: 8-12 years. Factors extending life: annual professional maintenance, changing filters monthly, keeping outdoor unit clear of debris. Signs replacement needed: frequent breakdowns, R-22 refrigerant (phased out, expensive to recharge), SEER below 10 (energy cost savings justify new unit).
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