How Much Does Air Conditioning Cost? Most homeowners report spending between $, and $, to have air conditioning installed. This price is more typical of a central A C unit installation rather than a window central air conditioner addition which typi.y averages about $. Your total cost .A new whole house air conditioning system will cost between $ and $, depending upon the size of the system, equipmentnds, and installation requirements..How much does it cost to install central air conditioner unit? The price to install central air conditioner units with heating unit is between $, and $,. The HVAC installation costs are for complete heating and cooling system and labor cost..Learn all about central air contioning installation costs. Read general central ac prices and get free HVAC estimates. CostOwl.com.