The Anatomy of an Air Conditioning System in Perth

Air conditioning (often referred to as AC or aircon) is an essential part of modern living especially in regions with hot or humid climates. But have you ever wondered how these machines cool your home or office? Let’s delve into the anatomy of an air conditioning system to understand its components and how they work together.

In today’s fast paced world the importance of reliable air systems and robust electrical infrastructure cannot be overstated. Enter Gildan Air and Electrical a name synonymous with excellence in providing top notch air conditioning solutions.

With a commitment to quality innovation and customer satisfaction Gildan Air and Electrical stands out as a beacon of trust and expertise in the Air Conditioning industry. If you’re seeking the comfort of a perfectly cooled room Gildan Air and Electrical is your go to partner for all your Aircon needs.


At the very heart of the system lies the compressor a crucial component in the cooling process. Its primary function is to compress the refrigerant gas thereby elevating its temperature and pressure.

Once compressed this high pressure  high temperature gas is channelled towards the condenser coil. The efficiency of the compressor directly influences the overall performance of the entire air conditioning system.

Contemporary compressors are crafted to be energy efficient ensuring optimal cooling whilst maintaining minimal energy consumption. Regular servicing of the compressor is paramount to avert potential malfunctions and to guarantee the air conditioning unit’s longevity.

Aircon compressor

Condenser Coil

Positioned within the outdoor unit, the condenser coil plays a vital role in dissipating the heat extracted from the compressed refrigerant gas, subsequently converting it into a liquid state.

As this gas undergoes cooling, it expels the heat previously absorbed from your home’s interiors into the external environment. The design of the coil is meticulously planned to facilitate maximum heat dissipation, ensuring swift cooling of the refrigerant.

It’s imperative to ensure the condenser coil remains unobstructed and clean; any impediments can compromise its efficiency, leading to escalated energy consumption and diminished cooling capacity.

Aircon condensor coil.

Expansion Valve

Post its journey through the condenser coil, the refrigerant is directed towards the expansion valve. This particular valve is tasked with reducing both the pressure and temperature of the refrigerant, priming it for its next destination: the evaporator coil.

Acting as a precise regulator, the expansion valve ensures an appropriate amount of refrigerant is introduced into the evaporator coil.

Its role is pivotal in maintaining equilibrium between the high-pressure components (compressor and condenser) and the low-pressure segment (evaporator) of the system.

A malfunctioning expansion valve can precipitate issues such as the evaporator coil frosting or a decline in cooling efficiency.

Aircon expansion valve

Evaporator Coil

Nestled within the indoor unit, the evaporator coil stands as a testament to engineering brilliance. Here, the chilled refrigerant courses through the coil, imbibing heat from the indoor air propelled over it by the fan.

As the refrigerant assimilates this heat, it undergoes evaporation, reverting to its gaseous state. The resultant cooled air is then recirculated into the room. The efficacy of the evaporator coil determines the swiftness and efficiency with which a room reaches the desired temperature.

Analogous to the condenser coil, it’s of utmost importance to ensure the evaporator coil remains pristine. A sullied coil can hinder the system’s efficiency, culminating in increased energy expenditure and a less than ideal indoor ambience.

Aircon Evaporator coil -Gildan Air Electrical, Perth


The blower, often referred to as the fan, is instrumental in circulating air across the evaporator coil, facilitating an effective heat exchange process.

This component not only ensures that the air is cooled efficiently but also aids in its even distribution throughout the premises.

A well-functioning fan ensures that every corner of the room or building benefits from the cooling effect, creating a uniformly comfortable environment.

Aircon fan blower -Gildan Air Electrical, Perth


While it might not always be in the limelight, the filter is undeniably vital for preserving air quality within a space. Acting as a sentinel, it captures dust, pollen, and a myriad of other airborne contaminants, ensuring they don’t find their way back into the circulated air.

For the air conditioning system to function at its peak and to maintain a healthy indoor atmosphere, it’s imperative to regularly clean or replace the filter.


Often dubbed the ‘brain’ of the system, the thermostat continually gauges the ambient temperature. Based on the readings, it communicates with the air conditioning system, instructing it when to commence or cease operations to maintain the desired temperature. Contemporary thermostats come equipped with programmable features, offering users the flexibility to set varied temperatures for different times of the day, optimising comfort and energy consumption.

0% interest payment
plans via Skye


Whilst not a tangible component like others, the refrigerant is undeniably the essence of the air conditioning system. This unique fluid perpetually circulates within the system, transitioning between its gaseous and liquid states.

Its intrinsic property to absorb and subsequently release heat is the cornerstone of the cooling process, making the wonders of air conditioning a reality.


Line As the system goes about its cooling duties, it concurrently dehumidifies the air. This results in moisture being extracted from the air, which then condenses on the evaporator coil.

The drain line plays the pivotal role of channelling this condensed water away, ensuring it’s safely expelled from the unit. Regular checks on the drain line can prevent potential blockages and water damage.


For centralised air conditioning systems, the ductwork is the intricate network that ensures cooled (or heated) air is efficiently distributed throughout the property.

It’s of paramount importance that these ducts are both sealed and insulated appropriately. This not only guarantees optimal air distribution but also ensures energy is utilised efficiently, leading to cost savings in the long run.


Understanding the anatomy of an air conditioning system provides insight into the marvel of modern engineering that keeps us comfortable.

Regular maintenance, including cleaning and checking all these components, ensures the system’s longevity and efficiency.

Whether you’re a homeowner looking to understand your system better or someone curious about how things work, we hope this guide has shed light on the intricate workings of the aircon system.

Cool Your Baldivis Home with
Gildan Air & Electrical

We supply and install Actron Air Conditioners, Samsung Air Conditioners, Fujitsu and Daikin air conditioners. We specialise in new homes and renovations as well as changeovers. Our prices and service are unbeatable when you need split system, reverse cycle and ducted air conditioning.

Call us on 042 889 2229 or please fill out the form for a free no
obligation quote on your aircon or electrical needs.

14 + 3 =

author avatar
Gildan Air & Electrical