Can windows air conditioners out-perform split system air conditioners?

If you’re like most Australians this year, you’ve definitely felt the heat!
With scorching summer days and sky-high humidity, there’s never a bad time to install a split system air conditioner.
If you’re in the market for a new cooling solution, the options can quickly become overwhelming.
Whatever you choose, it’s important to research all available systems that fit your property and budget.
Two of the most cost-effective options in terms of purchase price, installation, and running costs are the window vs split system air conditioners.

Both these systems are fixed into a single space or room from which although it can be removed, it takes significant time and effort. Both systems are generally considered quite efficient in terms of running costs and have a range of options and features, which can increase or decrease the output, efficient and other variables. So, which one is better? To work out whether window air conditioners can out-perform their split system air conditioners equivalents, there are a range of issues we will look at in an attempt to provide the best information to help you make your decision.

How does a window air conditioning system work?

Window air conditioning units are self-contained units, which sit on a windowsill of your home. The condenser sits outside, while the indoor unit sits within the home, usually flush with the window it is popping out. This allows for the unit to have a semi-permanent nature about it and is perfect for rental homes should the tenants want air conditioning they can essentially ‘take with them’.

The window air conditioner works by cooling the inside air by pushing the air over an evaporator, by using the internal fan. The hot air is pushed outside through the external side of the unit, while the cool air is circulated through the room. It is the complete all in one cooling machine.

How does a split system air conditioner work?

Working on a similar concept as the window air conditioner, the split system air conditioner has two separate sections, connected via pipes. A condenser is outside on an external wall of your home and a head unit place in one or more rooms inside your home.
The head units are usually placed high on an internal wall, allowing for the cool air to be circulated the room with little to no distribution to your floor space.
Installation of a split system air conditioner unit is more permanent than your window unit installation, and this should be considered when looking to choose a system to best suit you and your family’s needs. For more information on split systems visit our page.

Installation a split system air conditioner or window air conditioner

When installing either unit, it’s always best to use a licensed and qualified air conditioning specialist.
They know how to position your split system air conditioner for maximum efficiency and performance.

In the window vs split system debate, installation requirements are a key difference.
While professional installation is ideal for both, a window unit can be installed as a DIY project.
With just a few brackets secured to the window frame, you can enjoy cool air quickly.

However, it’s crucial to install the window unit flush against the frame with no gaps for air or rain.
Improper installation can reduce efficiency and allow unwanted elements into your home.

The split system air conditioner unit, on the other hand, requires a professional to install at all times. There are wholesale changes required to your home as well as the connection and installation of pipes, the condenser and wall unit to your home.
The performance of your system be it a window or split system air conditioner will largely depend on a licenced and professional installer installing your unit into your home – as it should be done.

Cost

It’s no secret that split system air conditioners cost more upfront than other cooling options.
In the window vs split system comparison, initial purchase and installation costs are a major difference.
Split system units typically range from $650 to over $3,500 depending on brand, size, and features.
Installation costs for split systems average around $120 per hour, with most jobs taking 4 to 8 hours.
The time depends on system size, job complexity, wall access, and property location.

In contrast, window air conditioners are more budget-friendly in terms of both price and installation.
They typically range from $395 for a 1.6kW unit to around $1,250 for a larger 6kW model.
Installation can be done DIY, although it’s recommended to have two people due to the unit’s weight.
This makes window units a more accessible choice for budget-conscious homeowners or renters.

Noise

One of the key differences in performance of the two units is the noise they omit. As the window unit is an ‘all in one’, the noise comes from the head unit/condenser straight into the room in which the cool air, is being pushed into. This can make the units very noisy for a sitting or sleeping room. In contrast, with the split system air conditioner units, the condenser unit is placed outside on an external wall of the home or office – making them a lot quieter to operate.

Efficiency

Depending on the size of the area that you are cooling, the size of the unit will determine the efficiency. As a general rule the required space per unit is as follows:

• 2.6kW – Ideal for rooms between 10–25 sqm, such as a small bedroom or study

• 3.5kW – Best suited for spaces around 25–35 sqm, like a larger bedroom, sitting area, or compact dining room

• 5–6kW – Suitable for rooms between 35–60 sqm, including a home office, lounge room, or combined living areas

• 7–8kW – Designed for 60–80 sqm spaces, perfect for large open-plan lounges, offices, or expansive shared living areas

With the majority of window units being under 6kw, this accounts for the smaller spaces being suited for the window unit, unless multiple units were installed.

In addition to this, split systems are generally more efficiency than window units due to the difference in insulation. Window air conditioning units typically allow some heat from outside to enter through the unit and gaps in the window frame in which the unit is installed.

Is One System Better Than the Other?

In simple terms, the answer is no.
When it comes to choosing between air conditioning systems, it’s all about your specific needs and living situation.
The right solution will vary depending on property type, lifestyle, budget, and whether you own or rent.

When a Window Unit Is the Better Choice

A window air conditioner can be ideal for short-term needs or where flexibility is required.
For example, if you’re looking for a study unit that’s cost-effective and portable over winter, this is a great option.
Renters benefit too—window units are easy to remove when moving out, making them a practical choice.

A window unit is the best option when:

• You are renting and need a removable solution

• You have a limited budget

• Your home lacks easy access to external walls

• You’re cooling a small space

When a Split System Is More Suitable

On the other hand, a split system offers more advanced features and better long-term value, especially for homeowners.
If you’re cooling larger areas or want a quieter system for sleeping, a split system may be the better solution.

A split system is the best option when:

• You want to increase your property’s rental appeal

• You’re cooling larger or open-plan spaces

• You need to cool multiple rooms

• A quieter system is required for bedrooms

• You’re seeking higher energy efficiency and control

Making the Right Choice for Your Home

There’s no one-size-fits-all answer in the window vs split system debate.
It ultimately depends on your home’s layout, your comfort preferences, and your long-term plans.
That’s why it’s crucial to speak with an air conditioning specialist, not just a retail salesperson.

Get expert advice from Rite Price Heating & Cooling to compare window vs split system options and choose the right solution.

A licensed expert will assess your space, evaluate your cooling needs, and recommend the most suitable solution for your budget.
They’ll also help you compare window vs split system air conditioners based on performance, installation, and ongoing running costs.
At Rite Price Heating & Cooling, we offer tailored solutions to suit every Adelaide home, from compact apartments to large family properties.

Rite Price Heating & Cooling offers tailored solutions for all needs—split system, window, ducted, portable, residential, and commercial systems.
There’s no doubt that both window and split system air conditioners can keep you cool in Australia’s intense summer heat.
The key is choosing the right solution for your home—not the one with the biggest sales commission.

So rather than working through if a split system or window unit is best for your need, look at all available solutions, speak with the experts and get them to fit it professionally. This will lead to the best product and service for your needs and ultimately the best performance. To find out more about the range of split system and window air conditioners available from the team at Rite Price Heating and Cooling, speak with one of our expert team of air conditioning specialists to arrange a free quote and a detailed overview of the performance and features of the air conditioning system of your choice.