A ductless system is a type of heating and cooling system that does not require ductwork to distribute air. Instead, it uses individual units installed in different rooms or zones, allowing for targeted temperature control. This makes it an energy-efficient option, as you can heat or cool only the areas that are in use. These systems typically consist of an outdoor compressor unit and one or more indoor air-handling units. They are often referred to as mini-split systems and can provide both heating and cooling, making them versatile for year-round comfort in homes and businesses.