Comprised of a condenser, compressor and evaporator all located within a single cabinet. This type of system is commonly used in small commercial buildings. The unit is typically placed on a roof or on a concrete slab next to the building foundation. As a single system, it is easier to service.
Consists of an external compressor and condenser combined with an internal air handler. This type of split design unit is application specific and is frequently used when installation space is an issue.