Sacramento California AC heating service AC heating maintenance AC heating diagnostic ductless mini split repair and service ductless mini split estimate for installation. Duct less mini split install estimate 610 to 625 sf one room apartment. Unit to be installed in living room area. Maintenance 9 hp split units Carrier condenser’s first co air handler is in hallway Commercial maintenance 2 times per year $85 each unit does not include additional perks. for additional perks quarterly maintenance is required.