As with every major purchase, the cost of installing a new air conditioning system is going to largely depend on the specifics for the unit you choose. Unfortunately, there’s no easy way to estimate the installation costs for a new system because there are just too many variables involved. In general, however, if you’re simply replacing an existing system and have most of the components in place, you should plan for an average of $6,000-8,000 or more for the installation process. Having a completely new system installed with all new components? You’re looking at a much higher range that can run anywhere from $10,000 to $17,000 or more.