Operation depends on configuration, but packaged systems typically heat and cool your home the same way their stand-alone counterparts do. The ducting with a single cabinet system is slightly different. The duct work is attached to the system rather than connecting to various components in your home.
Unlike split-system units, all components of a complete heating and cooling system are contained in one location, making packaged units ideal for situations in which indoor space is at a premium. The heat pump transfers heat by reversing the refrigeration cycle used by a typical air conditioner. Through a cycle of evaporation and condensation, the indoor coils are heated, and the air is pushed over the warm coils.