Split air conditioner units are called split units because they come in two pieces. There is the air handler section, which would be the indoor component. The air handler consists of an evaporator and fans to circulate the air across the cool coil. The outdoor is a condensing unit that consists of a condenser coil, fan, and a compressor. This is one of the major advantages of the split air conditioner system. The compressor being outside makes the unit significantly more quiet than a window air conditioner or a portable air conditioner.
The split air conditioner is still intended for a zone type cooling approach. A zone would typically consist of a room. The units generally should be installed by a qualified hvac technician. The split air conditioner can be mounted in an interior wall, exterior wall, or a window. They require two lines to run from the indoor section to the outdoor section in which refrigerant is circulated. A third line for water condensate from the air handler may also be necessary depending on the installation.
Split AC systems can be very advantageous over a central air system. The first cost is generally lower due to the units not needing a ducting system. They also allow for more efficiency when cooling is not required for the whole structure. The user can save money by shutting off many of the zone conditioners and leaving the bedroom split ac unit on for example.