Central Air systems are made to cool your whole house when only one room may need cooling. On the other hand, ductless mini-splits cool only the areas you want and not the areas you don’t. Energy wasted in long lengths of uninhabited ductwork means higher energy bills. Less than 5% of cooling loss occurs in insulated refrigerant lines compared with up to 25% through ducts. Retrofitting homes to install Central Air systems requires cutting holes in walls, floors, ceilings, or decreasing closet space with ducts. Ductless mini-splits require just a small 3-4 inch hole in the outside wall which means less mess and better home aesthetics.