There are a few different options when it comes to HVAC systems. This video explains two different systems, a packaged and a rooftop system, what they do differently, and why you might need them.
Traditional split systems use separate units that are installed both inside and outside the home. A packaged unit contains heating and cooling systems in one unit that is installed outside of the home. They are designed to sit on the side or the roof of a building.
Packaged units are perfect options for people with no available structures or space for units and equipment inside the house. Packaged units need to be able to withstand the elements and there are a variety of configurations to handle different climates.
The HVAC compressor, coils, and air handler are all housed within the packaged unit. It can also be dual-use if an electric heating strip is added. There are packaged heat pumps, including a packaged gas electrical system that has both heating and AC.
Buying a package or rooftop HVAC system is the same as buying a traditional split HVAC system. If you are replacing a system, make sure to get down all of its specs. If you are transitioning to a package or rooftop HVAC system, talk with local installers to get exactly what you need.