The average cost of installing a new central air conditioning system typically ranges from $3,000 to $7,000, but can go up to $10,000 or more for larger homes or high-end systems. Factors affecting the price include system size, energy efficiency rating, ductwork requirements, and labor costs. SEER rating (Seasonal Energy Efficiency Ratio) also impacts price, with higher SEER units costing more upfront but offering long-term energy savings. Additional costs may include permits, electrical work, and potential ductwork modifications. Always get multiple quotes from licensed contractors for accurate pricing.