average cost for heat pump system
1 Expect to pay about $2,000-$8,000 for installation of a whole-house air-source heat pump system in an average home (three-ton capacity) with existing usable ductwork.2  The total costs can double or triple to $4,000-$24,000 or more if new ductwork must be installed or failing ductwork must be replaced. In an older home, adding an electric heat pump might require hiring an electrician to upgrade the electrical panel to 200 amps, which can cost an additional $1,300 -$3,000.