Multi Split Unit Air Conditioning Systems

During the British summer, high air temperatures and high relative humidity outdoors can sometimes combine to produce uncomfortably high temperatures – higher than 27°C or so – indoors. In these situations, air conditioning can cool, dehumidify and filter the air in your home or office creating a comfortable, hygienic environment in which to live and work. Given the vagaries of the British weather, however – and similar comments apply if you rent your home or are likely to move home soon – you may not be able to justify the expense of a fixed central air conditioning system. A split air conditioning system, on the other hand, is inexpensive in comparison and can be transferred from property to property as you desire. A split unit air conditioning system is capable of cooling your home unobtrusively via one, two, or more indoor sections connected to a single outdoor unit.

How Multi Split Unit Air Conditioning Works

Like any form of air conditioning multi split unit air conditioning works by extracting heat from the air of a room and discharging it outdoors. A multi split unit air conditioning, however, is so-called because it “splits” the cold unit – the “evaporator” coil which is located indoors – from the hot unit – the “condenser” and “compressor” which are located outdoors, usually in a weatherproof metal cabinet – for greater efficiency and less noise.

A chemical – known as a “refrigerant”– which is easily transformed from liquid to gas, and back again, is pumped through the evaporator coil where it absorbs heat energy as well as moisture from the air in a room. The cool, dehumidified, air is circulated back into the room and the heat is carried away by the refrigerant to the outdoor unit where it is discharged. The refrigerant itself is compressed so that it once again becomes a low pressure liquid and the cycle is repeated until optimum air temperature is attained.

Pros & Cons of Multi Split Unit Air Conditioning

The fact that the outdoor unit of mutli split unit air conditioning system can be located outdoors up to 50′ or so away from the indoor unit has obvious benefits in terms of the placement and efficiency of the outdoor unit – constraints on the size of components are less likely – and the noise that is audible indoors. Split unit air conditioning systems also typically provide powerful outputs and good air distribution and so are suitable for cooling large areas. They also offer flexibility in interior design with wall mounted, ceiling mounted or floor standing air handlers and the convenience of remote control, if indoor units are positioned out of reach.

Split unit air conditioning systems do, of course, require the internal and external units to be connected together – usually via copper pipe – through an external wall. This may need to be done professionally but, in some cases, the drilling of a 3″ hole is all that is required. Another consideration is the condensate drain pan – a feature of all multi split unit air conditioning systems – which may be susceptible to mould growth and bacteria which can be carried into the air stream passing over the pan. Special films are available to prevent any potentially hazardous micro-organisms from being circulated throughout your home.

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