What Is Split System Air Conditioning?
If you are researching cooling options for your home, you have probably come across the term split system air conditioning. But what exactly does it mean, and how does it work?
In simple terms, a split system air conditioner is a system made up of two main components: one unit installed inside your home and one unit installed outside. Together, they provide efficient cooling in summer and heating in winter using reverse cycle technology.
Split systems are one of the most popular air conditioning choices in Perth because they are energy efficient, relatively simple to install, and ideal for cooling individual rooms or specific areas of a home.
Quick Summary
Split system air conditioning uses an indoor unit and an outdoor compressor to efficiently cool and heat individual rooms. It is one of the most popular air conditioning options in Perth because it is energy efficient, quieter than older systems, and suitable for bedrooms, living areas, and small commercial spaces. Choosing the correct size and ensuring professional installation are key to long-term performance and lower running costs.
How Does a Split System Air Conditioner Work?
A split system consists of:
• An indoor unit mounted on a wall inside the room
• An outdoor compressor unit installed outside
• Refrigerant piping connecting the two units
The indoor unit draws warm air from the room, passes it over cooling coils filled with refrigerant, and then blows cool air back into the space. The heat collected from inside is transferred outside through the outdoor unit.
In reverse cycle mode, the process is reversed, allowing the system to heat your home during winter.
Why Is It Called a “Split” System?
The name comes from the fact that the system is split into two separate components: the indoor air handling unit and the outdoor compressor. This design keeps the noisy compressor outside, making split systems quieter indoors compared to older window or box-style air conditioners.
What Are the Main Types of Split Systems?
1. Single Split System
This is the most common type. It connects one indoor unit to one outdoor unit and is designed to cool or heat a single room or open-plan area.
Ideal for:
• Bedrooms
• Living rooms
• Home offices
2. Multi-Split System
A multi-split system connects multiple indoor units to one outdoor unit. This allows you to cool or heat several rooms independently.
Ideal for:
• Larger homes
• Households wanting room-by-room temperature control
• Homes with limited outdoor space
What Size Split System Do You Need?
Choosing the correct size is essential. An undersized system will struggle to cool the room, while an oversized system may cycle on and off too frequently, increasing energy use.
Sizing depends on:
• Room size (square metres)
• Ceiling height
• Insulation
• Window size and sun exposure
• Open-plan vs enclosed layout
If you are unsure, using our split system size calculator or booking an on-site assessment ensures the system is matched correctly to your home.
What Are the Benefits of Split System Air Conditioning?
Split systems are popular in Perth for several reasons.
Energy Efficiency
Modern reverse cycle split systems are highly energy efficient, especially when correctly sized and installed.
Heating and Cooling in One System
You do not need separate heating and cooling systems. Reverse cycle technology provides both functions.
Quiet Operation
Because the compressor is installed outside, indoor noise levels are low.
Flexible Installation
Split systems can be installed in most homes without major structural changes.
Lower Upfront Cost Compared to Ducted
For single-room solutions, split systems are typically more affordable than full ducted air conditioning systems.
How Much Does Split System Air Conditioning Cost?
Costs vary depending on:
• Unit size
• Brand
• Installation complexity
• Electrical requirements
In Perth, most split system supply and installation projects fall between $2,500 and $5,000, depending on system size and layout.
Getting a professional on-site quote ensures accurate pricing.
Is Split System Air Conditioning Suitable for Perth Homes?
Yes. Split systems are well suited to Perth’s climate.
They handle hot summers efficiently and provide effective heating during cooler winter months. Because they operate independently in each room, they can also help reduce energy costs compared to cooling the entire home.
When Should You Replace Your Split System?
You may want to consider replacement if:
• Your system is over 10–12 years old
• It uses outdated refrigerant such as R22
• Cooling performance has declined
• Energy bills have increased
• The unit has become noisy
Modern systems are quieter and significantly more energy efficient.
Split System Supply and Install Experts
Split system air conditioning is a practical, efficient solution for cooling and heating individual rooms or specific areas of your home. With proper sizing and professional installation, it can provide reliable comfort for many years.
If you are considering installing a split system in Perth, getting expert advice ensures you choose the right unit and avoid costly mistakes. Contact us for more information.
