Climate control systems are expensive, for the most part. They’re also necessary for a lot of people, which means that the name of the game is to get the best return on investment possible. The way to do that is to make it last for as long as you can, and to replace it before it suddenly dies on you. If you’re using a ductless system, you should know that the average one lasts about 10-15 years. You can use that range as a guide, but the best way to tell whether you need a new ductless system is to keep watch for certain warning signs.