If you have SMALL room that needs COOLING, a ductless mini-split system could be a great solution.
As the title implies, ductless splits don’t rely on ducts at all. Instead, a single small unit is installed in each section of your house, with enough power to cool or heat that particular section. They make an attractive option for homes or remodels that can’t support a system of ducts.
They also give you room-by-room control over the air temperature since you can adjust each individual part of your house separately from the others. Not only does this accommodate families with varying comfort preferences, but it can save you a great deal of money on air conditioning/heating expenses, since you can simply turn off the units in parts of your house you aren’t using.