average cost of high wall split air conditioner
1 Expect to pay $2,000-$5,000 to install a complete ductless mini-split air conditioning system in a 800-1,000-square foot home, or $5,000-$7,000 for a 2,000-square-foot house.aying $4000 for a 12000 BTU heat pump mini split installed for a sun filled family room. The unit meets the standards for the 30% rebate plus $500 from Nstar rebate. Final cost $2300.