A ductless air conditioner, ductless mini-split system or ductless heat pump is a heating and cooling system that provides efficient climate control for individual rooms or zones in a building. Unlike traditional central HVAC systems that use ductwork to distribute air, ductless systems are designed to operate without requiring ducts. They consist of two main components: an indoor unit and an outdoor unit. Here's a brief description of the critical components and how ductless air conditioners work.Ductless air conditioners are a versatile and efficient solution for both residential and commercial spaces, offering precise climate control and energy savings. The number of indoor units you need will depend on the size and layout of the space you want to cool or heat.