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What is Split System Air Conditioning

In today’s changing world of home and commercial climate control air conditioning systems play a role in our daily lives.  Split system air conditioning has gained popularity, for its efficiency, adaptability, and space saving design.  Unlike ducted systems split systems offer a versatile option that seamlessly integrates with modern living and working spaces.

A split system air conditioner consists of two units; a unit that cools the room and an outdoor unit that releases heat outside.  This separation optimises space utilisation and energy efficiency making it a preferred choice for homeowners and businesses.  Beyond their benefits split systems attract those seeking comfort, affordability, and environmental friendliness.

By exploring the mechanics, advantages and considerations associated with split system air conditioning it is clear why this technology has become a choice, for achieving indoor climate control.

If you’re thinking about upgrading your home boosting the air conditioning in an area or optimising your existing system, split system air conditioning offers a solution that can meet different needs and individual tastes.

In this article we’ll look at split system air conditioning equipping readers with the knowledge to make well informed choices regarding their cooling and heating requirements.  Additionally, we’ll point out some errors individuals tend to make with air conditioning helping you steer clear of them.

What does Split System Air Conditioning Mean

Split system air conditioning is an advancement in technology for controlling climate.  It is a direct expansion (DX) system that consists of two units; the indoor unit (evaporator) and the outdoor unit (condenser).  This separation is essential for the system to function effectively and efficiently allowing temperature control while consuming energy.

Exploring how split system air conditioning works compared to other systems helps us understand why it’s becoming increasingly popular and dominant in the market.  Lets dive deeper…

Understanding How Split System Works

A split system air conditioner comprises two main components connected through interconnect wiring and refrigerant piping.  The outdoor unit houses the control printed circuit board/s, condenser coil, and compressor which are all important for removing heat from the building.  The condenser is the powerhouse, making it an integral part of the aircon.

On the hand inside the indoor unit contains the evaporator coil and blower fan that collaborate to cool and circulate air within the space.  By placing components this separation allows for quieter and more efficient operation.

Understanding The Refrigeration Process

The functioning of a split system air conditioner relies on utilising a refrigeration cycle.  This cycle involves converting refrigerant, between gas and liquid states.

The process begins with the compressor, which increases the pressure and temperature of the refrigerant.  This allows the refrigerant to flow to components of the condensing unit.  During this phase the refrigerant releases its heat to the surrounding air and changes form.

The cooled liquid refrigerant then travels to the evaporator in the unit through an expansion valve, where its pressure is decreased.  Consequently, it transforms back into a gas.  It the absorbs heat from the air.  The refrigerant returns to the compressor via pipework, carrying away absorbed heat and the cycle repeats.  This method effectively removes heat from indoors, ultimately lowering the temperature as desired.

Refrigeration Cycle Diagram including Evaporator and Condenser

Inverter Technology: A Game Changer

Significant advancements in split system air conditioning typically involves the integration of technology.  Traditional air conditioners operate at a fixed speed, turning on and off to maintain the desired temperature.  This approach tends to lead to energy usage and temperature fluctuations.

In contrast split systems equipped with inverter technology can dynamically adjust the compressor speed.  This allows the AC to operate smoothly at required capacities without disruptions.  This flexibility allows for desired room temperatures while also reducing energy consumption.  This capability contributes to prolonging the units lifespan, by minimising wear and tear caused by cycling on and off.

Comparison with Ducted Air Conditioning Systems

When it comes to air conditioning systems, split system air conditioning provides a simpler installation process.  It also helps reduce energy loss, unlike ducted systems that need extensive ductwork throughout the building.  For large buildings, ducted or central systems may be less energy efficient due to heat losses in the ducts or pipework.

Split systems offer an energy solution for individual rooms or smaller spaces by directly delivering air and eliminating the need for ductwork.  Split systems also allow for climate control tailored to preferences.  Wall splits enable temperature settings in zones or rooms meeting specific comfort needs while minimising energy consumption.  Split system air conditioning is certainly highly versatile.

Splits can be applied in a variety of settings due to their operational sophistication and numerous benefits.  The energy efficiency and precise temperature regulation of this system make it an appealing option, for those looking to enhance their climate control solutions.  Whether looking for workplace benefits or home life comfort, split system air conditioning provides a range of advantages.

How Does a Split System Work

The way a split system air conditioner operates is truly fascinating, demonstrating the intelligence of engineering.  It combines components and processes seamlessly to deliver cooling and, in the case of reverse cycle systems, the added benefit of heating as well.

Let’s delve into how split systems use the refrigeration cycle to manage temperatures.  By doing this, they are creating an environment that can be either cool and invigorating or warm and snug as per your requirements.

Getting to Know the Key Components and Their Functions

The compressor plays a key role in the air conditioning setup.  Is typically situated in the outdoor unit.  It compresses the refrigerant, increasing its pressure and temperature before sending it over to the condenser coil.

The condenser coil resides in the outdoor (or condensing) unit.  It’s tasked with expelling the absorbed heat from indoor air into the surrounding outdoor space.  As the hot refrigerant vapor travels through this coil it releases its heat energy.

Situated in or between the units you’ll find the expansion valve.  Its primary duty involves controlling how refrigerant flows into the evaporator coil.  By reducing pressure on the refrigerant it allows for expansion which results in cooling down.

The evaporator coil can be found in the indoor unit.  Its job is to absorb heat from the indoor air using the refrigerant.  When the cold coil draws in heat it turns the refrigerant into a vapour, which then returns to the compressor to begin the cycle again.  This continuous cycle is just one of the many benefits of the reverse cycle refrigeration cycle.

Advantages of Split System Air Conditioning

Split system air conditioners have become increasingly popular due to the benefits they offer.  These advantages include their energy efficiency and the flexibility they provide in terms of installation and usage.  Here are some key perks that make split systems a preferred choice for both homes and businesses.

Improving energy efficiency

Split air conditioners are known for their energy efficiency, which is definitely an advantage.  By utilising inverter technology these systems can efficiently adjust the compressors speed to maintain the desired temperature eliminating cycling on and off.  This not helps conserve energy but also reduces strain on the system leading to longer lifespan and cost savings on electricity bills and maintenance in the long term.  Having an energy efficient air conditioner is highly desirable nowadays.

Efficient multi-head wall split system condenser with AC installer and customer

Flexibility and Adaptability

Split systems offer flexibility in terms of installation.  In comparison to central air conditioning or ducted systems split systems provide an adaptable installation option.  They can be easily installed in places without requiring a network of ducts; only a small hole is necessary for connecting the units.  It’s important to ensure there is space for the units themselves during installation.  They are well suited for renovating buildings or spaces where installing ductwork’s not feasible.

Additionally split systems offer scalability benefits by providing an adaptable approach to air conditioning.  You have the option to link multiple indoor units to a single outdoor unit allowing you to independently adjust the temperature in different areas or rooms.  This zoning feature enables you to personalise the climate control in your home or workplace, for comfort while also conserving energy.

Aesthetic and Practical Benefits

These systems combine both appeal and practicality.  Split system air conditioners are designed to blend into your space adding a touch of style without disrupting your existing decor.  The indoor units come in many styles.  They can be easily mounted on walls, ceilings, or recessed into drop ceilings effortlessly blending into any setting.  For example Daikin split systems offer a variety of styles, colours and features.

The outdoor unit can be discreetly placed outside to manage most of the noise and mechanical functions ensuring an undisturbed environment.  Modern split air conditioning systems provide flexibility with up to 30 meters of copper piping and interconnect cabling for choosing the units location and system setup.  This flexibility is particularly useful for commercial air conditioning installations due to office layouts and building structures.

Improved Air Quality

Many split systems are equipped with air filters and purifiers that help remove dust allergens and other pollutants from the air.  This feature is advantageous for individuals with allergies or respiratory problems as it promotes healthy air quality.

Split systems also provide a dehumidification feature that helps regulate humidity levels, not only improving comfort but also preventing the growth of mould and mildew.  Ensuring air quality (IAQ) is crucial especially in commercial settings.

Easy Installation and Maintenance

Setting up a split system air conditioner is usually faster and less disruptive compared to systems resulting in labour costs and minimal disturbance to your home or business.  Maintaining these systems is convenient due to their user design, with filters and components that are easily accessible for cleaning or servicing.

Having an air conditioning system in place offers many benefits.  In summary split system air conditioners present an cost efficient way to control temperatures.  With energy saving features, simple installation process, improved air quality benefits, and low maintenance requirements these AC units are a choice for those seeking to enhance their cooling experience.

Making the Right Choice

When selecting the ideal split system air conditioning unit for your residence or business it’s essential to consider more  than its cooling or heating capabilities.  Various factors play a role in determining the systems performance, efficiency, and overall satisfaction.  To make an informed decision it’s crucial to take into consideration the following aspects:

Assessing Your  Space

The size and layout of the area being cooled or heated are factors in determining the suitable capacity of the air conditioning unit needed.  An undersized system may struggle to maintain temperatures while an oversized one can lead to energy consumption and inconsistent temperature regulation.  Consulting with a professional for a head load calculation is important.  They take into account factors beyond footage in their evaluation, such as ceiling height, window dimensions, and insulation quality.

Wall split condenser air conditioner installation on wall up high with installer on ladder

Energy Efficiency

Prioritising energy efficiency is vital as it can significantly impact your long term costs and environmental footprint.  When exploring units look for comparable models with lower Energy Efficiency Ratios (EER) and Zoned Energy Rating Labels (ZERL) to optimise energy savings.

These evaluations can provide an indication of how a system can convert energy into cooling or heating power.  Systems equipped with modern technology can assist in saving more by adjusting the compressor speed based on demand thus reducing energy wastage.

Enhancements and Usability

Modern split systems offer features to enhance comfort, convenience, and air quality.  Consider options, like timers that allow you to schedule your system to run when needed or smart controls that enable remote operation via your smartphone or tablet.  For air quality concerns explore units with additional filtration systems designed to remove allergens, dust, and other harmful particles from the air.

Climate Considerations

The local climate plays a role in selecting the most suitable split system for your requirements.  In regions experiencing extreme temperatures like South-West Queensland opting for a reverse cycle air conditioner is practical as it can both cool and heat your space efficiently.  In milder climates such as South-East Brisbane, a cooling unit may suffice for your needs.

Discussing your needs with an expert can assist you in selecting a system that fits well with your surroundings.  A local expert will be most familiar with suitable options for your home or business.

Installation and Maintenance

It’s crucial to consider how the quality of installation can impact the effectiveness and longevity of your split system.  When choosing an installer for your split system it’s essential to seek out someone with a reputation and extensive experience.  Remember to enquire about the installation support and upkeep services they offer.  Regular maintenance is key to ensuring that your system remains in optimal condition.  When picking a system consider the ease of access to filters and serviceable components.

Comparing Costs and Benefits

While the initial cost is important it’s equally vital to think about the long-term value that the system will provide.  Opting for a sturdy unit even if it requires a higher upfront investment can result in substantial savings over time and heightened satisfaction.  When researching air conditioning brands prioritise manufacturers that offer warranties and are recognised for their reliability and top-notch customer service.

When considering split system air conditioning striking a balance between your needs and future comfort and expenses is crucial.  By dedicating time to research and consulting experts you can ensure that the air conditioning system you select is both effective and trustworthy, catering to all your needs.


In conclusion, split system air conditioning offers an efficient solution for climate control needs.  Whether you require cooling for a room, heating for an area, or something in between, split systems are an excellent option.  They provide flexibility, energy efficiency, and straightforward installation making them attractive to both homeowners and business operators.  These systems come with benefits, including their ability to seamlessly blend into any environment and improve air quality.  Moreover, the capability to customise temperature zones contributes to the comfort and convenience they provide.

When considering upgrading or installing an air conditioning system it’s crucial to select the unit that suits your requirements and ensure professional installation and maintenance.  This approach will help you maximise your investment.  The systems energy efficiency, advanced features, and capacity should align with your space needs and personal preferences to guarantee performance and comfort.

Ultimately choosing a split system aircon unit is a decision that will enhance your comfort and overall well-being.  By considering your options and consulting with experts in the field you can reap the benefits of a climate control solution that exceeds your expectations.  Split system air conditioning offers more than regulating temperature; it can significantly enhance the ambiance of your home or workplace.

Brisbane air conditioning image with sunset and Brisbane river

Explore the advantages of split system air conditioning.  Enter a realm of efficient, adaptable, and dependable climate management.  Ready to enhance your space?  Locate an air conditioning service nearby to begin enjoying a cosier and eco-friendly environment.  In search of air conditioning services in Brisbane, Gold Coast, Sunshine Coast, Logan, or Ipswich?  Look no further, than Ice Blast!  Our team of professionals is dedicated to ensuring your comfort and coolness.