Installing a central air conditioner usually costs between $5,000 and $10,000. The price can be higher depending on your home size, the type of system, and if new air ducts are needed. If you already have ducts, it will be cheaper. Installing a new system with new ducts can cost $8,500 to $20,000 or more. Average Cost Breakdown for a 2000 Sq Ft Home Understanding the HVAC system cost  starts with knowing where your money goes. The total price isn’t just for the AC unit, you’r