A ductless system is the best solution for homes without duct-work and installing duct-work is not feasible.
Ductless Air Conditioner: used only in the summer to provide complete home comfort efficiently and quietly.
Most modern Ductless Air Conditioners/Ductless Heat Pumps use Inverter Technology to control the heating and cooling capacity of the unit. This technology automatically adjusts the compressor speed up and down by constantly monitoring the indoor temperature changes. They never over cool or over heat your home, and thus provide maximum comfort and efficiency.