A ductless or a mini-split system is a great cooling option for older homes. It can also be used in newer homes that need a zoned, cooling solutions. Ductless systems can be installed in individual rooms such as bedrooms and living rooms. By focusing your cooling needs to certain rooms, you save on operating costs because and energy. It’s an effective system for removing humidity too. As well, most mini-split systems have powerful filters to remove dusts. The disadvantage with this system is the upfront costs of the equipment.