What is a Wall-Hung Split System?
A "Wall Split", or more fully, a wall-hung split system is probably
the most common type of unit sold today. It consists of an outdoor unit
(or compressor or condenser) located in a convenient location outside
the premises, which is connected to an indoor unit (or head) located in
the spot where most benefit from the air flow will be obtained.
These days, almost all Wall Splits are Reverse-Cycle. What this means
is that as well as being able to pump heat from inside the interior to
outside it (and thus cooling the interior); the machine is also capable
of reversing this cycle. The system is able to pump heat from the
exterior to the interior and therefore heat the interior. A
reverse-cycle air conditioner is the only appliance capable of both
heating and cooling. To choose another alternative would mean
having to obtain separate devices to both heat and cool the premises.
The main advantage of the wall-hung split system is that the noisiest
component, the compressor, is located outside the house. With the
older-style room air conditioners, the compressor was located
immediately behind the air outlets, and thus all the noise of the
compressor was heard from the room. The split system keeps the noisiest
component outside, and only a small fan is necessary on the inside which
You can easily see why this system is the most popular unit nowadays.
Its disadvantage is, however, that it is really only suitable for
conditioning only one area or room. To achieve coverage of the
entire house then more than one Wall Split, a
Multi-Split System or a
Ducted System is needed.
Mitsubishi Electric Wall Hung Split System. Above
is the indoor unit, to the lower left the outdoor unit, and in the
centre the remote control units typically supplied with the system.