Designed to cool the entire house; a large compressor located outside of the house fills an indoor coil with air, then the coil uses refrigerant to cool the air.  This cooled air is then distributed throughout the house via air ducts and vents.

Life Span: 15-20 years

Cost: $$$

Pros: Quiet, convenient, and efficient

Cons: Installation can be expensive if your house does not contain air ducts