Several factors influence the installation price of an AC system in Winchester, with the system type, unit size, installation complexity, and home specifications accounting for most of the variance. Central air conditioning installation costs—from the units themselves to the labor and materials needed to put them in—average between $3,000 and $7,500. Yet, if you're looking into a ductless mini-split system, you're looking at a much wider range of potential costs: $2,000 to $14,500. That ductless range reflects what happens when the system type itself varies so widely. For the best idea of your potential costs—with the added benefit of knowing you're working with a figure specific to your home's price tag—get your local HVAC experts to quote you.