The answer to 'types of AC' is that there are several main types of air conditioning systems used in homes: central air conditioning, window units, ductless mini-splits, and portable ACs. Central air conditioning is the most common, with an outdoor compressor/condenser unit and indoor air handler that circulates cool air through ductwork. Window units are self-contained ACs that fit in a window opening. Ductless mini-splits have an outdoor compressor and one or more indoor air handling units, without the need for ductwork. Portable ACs are freestanding units that can be moved from room to room.
The type of AC system that is best for a home depends on factors like the home's size, layout, existing ductwork, and budget. Homeowners should consider energy efficiency, installation requirements, and ongoing operating costs when choosing an AC system.