Split-gas systems, also called Remote systems, have the air conditioning components split between two separate units that are installed in different locations and connected by insulated, copper refrigerant tubing through which the refrigerant travels.
- The condensing unit, consisting of the compressor, seawater condenser, and electrical components, is mounted in the engine room or other mechanical space.
- The air handler (also called the cooling/heating unit, or evaporator) includes the evaporator coil and a blower, and is installed in the living area in a similar manner to a selfcontained unit. Two air handlers can be connected to one condensing unit so that multiple cabins, or a single large area, can be cooled.
Remote systems are typically found on boats up to 80 feet (24m) in length, only limited by the number of condensing units that can be fit, and by the length of copper tubing between the condensing unit and air handler, which is a maximum of 50 feet (15m).
An installed remote system is typically more expensive than a self-contained unit, not only due to the equipment cost, but also because a remote system must be charged with refrigerant by a certified technician.
Some advantages of a remote system are:
- Less space needed in the living area for the air handlers.
- Quieter because the compressor is in the engine room.
- A wide selection of air handler types.
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