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Most Energy Efficient Air Conditioners For 2025 | Compared

According to the Australian Government, appliances can account for around 25 per cent of home energy use. Choosing an energy-efficient air conditioner can make all the difference when it comes to keeping your home comfortable year-round.

The government’s Equipment Energy Efficiency (E3) Program focuses on a range of products to increase energy efficiency, save money on bills, and reduce greenhouse gas emissions. Here is our guide to the most energy efficient air conditioners for 2025.

Energy efficient air conditioners – Important factors

Energy-efficient air conditioners are built to minimise power usage while delivering effective cooling and heating.

Energy efficiency ratings. When choosing an air conditioner, consider Energy Star ratings, Seasonal Energy Efficiency Ratio (SEER), and Energy Efficiency Ratio (EER). Higher ratings indicate better energy efficiency.
Inverter technology. The most energy-efficient air conditioners often feature inverter technology. This allows the unit’s compressor to adjust its speed depending on the cooling requirements, which can lead to energy savings.
Size and capacity. Selecting an air conditioner that suits the size and layout of your room is crucial for optimal energy efficiency. It won’t perform efficiently if the unit is too large or too small for the space.
Smart features. Modern air conditioners have Smart features like mobile app controls, timers, and automated temperature adjustments, which help optimise energy use based on your habits and preferences.
Eco-friendly. Many contemporary AC units are designed to be eco-friendly, an important consideration in today’s environmentally-conscious world. With rising energy costs, investing in the right air conditioner is vital to ensure long-term comfort and savings.
Leading brands. In Australia, we have a wide range of choices when it comes to energy-efficient air conditioners, thanks to top brands like Mitsubishi Electric, Daikin, LG, Fujitsu and Panasonic. These brands are well-known for offering models with high star ratings and advanced energy-saving technologies.

Energy efficient air conditioners – What to consider

The type of system. Whether it’s a split system, multi-split, or ducted system, you should decide if you prefer an inverter or a non-inverter, and whether you need it for heating and cooling.
Capacity. This is measured in kilowatts. For split systems, smaller rooms like bedrooms typically need a 2.5kW system, while larger, open-plan areas might require 6kW or more.
Running costs. Factors to consider include selecting a model with the right capacity for your space, opting for a system with an “Eco Mode,” and setting the optimal temperature (24°C on hot days and 19°C in winter).
Features and functions. Look for a model with various fan speeds, a broad airflow range, and a thermostat that lets you set the desired temperature. Typically, you just set your preferred room temperature, and the thermostat monitors the indoor temperature to adjust the air conditioner’s output as needed.

Most energy efficient split system air conditioner Australia

Mitsubishi Electric

Mitsubishi Electric is a highly regarded brand known for producing high-quality, energy-efficient air conditioning systems with advanced features. Their units are equipped with inverter technology, ensuring fast cooling with minimal energy consumption. Mitsubishi Electric systems are also praised for their quiet operation, creating a peaceful environment ideal for homes and offices.

Features: With a high Energy Efficiency Ratio (EER), these systems offer excellent power efficiency and usage flexibility.

Daikin

Daikin is a global leader in air conditioning systems and is renowned for its focus on energy efficiency. The Daikin US7 model is a highlight with its 7-star energy rating and 9.5 SEER rating. It offers built-in Smart features like humidity control and air purification for precise, constant temperature regulation.

Features: Advanced inverter technology and power options of 2.5kW, 3.5kW, and 5kW are available, making this unit perfect for eco-conscious buyers.

LG

LG is widely recognised for its innovation in air conditioning technology. Their units often feature dual inverter technology, which optimises the compressor speed to enhance cooling while reducing power consumption. Many LG models include smart features that allow users to control their air conditioner via mobile devices, improving efficiency and usability.

Features: Smart connectivity and ultra-quiet operation ensure a comfortable and eco-friendly experience.

Fujitsu

Fujitsu offers a range of energy-efficient air conditioners designed to perform well in Australia’s varying climates. The Fujitsu Lifestyle Range includes models with inverter technology, energy-efficient refrigerants, and human sensors that detect room occupancy to adjust the temperature and save energy.

Features: Systems have an energy rating of 5 stars and are available in various power outputs to suit different needs.

Panasonic

Many models feature inverter technology and advanced sensors that adjust the cooling process based on occupancy and ambient temperature. They also often include air purification technology, making them ideal for families concerned about indoor air quality.

Features: The Panasonic 5.0kW reverse cycle inverter model CS/CU-Z50TKR is well-regarded for its 7-star energy efficiency, eco mode, inverter technology, and air purification.

Most energy efficient ducted air conditioners in Australia

Several well-known air conditioning brands offer ducted systems, including Daikin, Fujitsu, and Mitsubishi, which are among the most popular options to consider.

Daikin ducted air conditioners

With over 45 years of experience in Australia, Daikin models easily handle Australia’s often harsh climates. The brand offers four ducted reverse-cycle systems:

Premium Inverter Ducted. Features R22 retrofit capability, so is ideal for small and large homes.
Inverter Ducted. This model is compact and designed for homes of all sizes, and perfect for spaces with limited roof and outdoor areas.
Slimline Ducted. It is designed for narrow ceiling spaces, making it ideal for homes with limited space.
Bulkhead System. Suited for discreet installations, particularly in drop or shallow ceilings.

Features: Automatic airflow adjustment, automatic fan speed selection, and Night Quiet Mode, which reduces outdoor noise levels and allows for a peaceful sleep. Daikin offers a retrofit system for existing homes, enabling you to install a new system while utilising the existing pipework and wiring.

Fujitsu General ducted air conditioners

With a strong history in the air conditioning market, Fujitsu General offers four ducted air conditioning ranges:

Bulkhead. A compact design with flexible installation options.
Slimline. Slim and compact, it is designed to fit most ceilings and includes zone control.
Single Phase. Offers high static pressure, allowing for multiple air ducts and zone control.
Three Phase. Known for higher energy efficiency and zone control.

Features: Multiple static pressure modes can be installed on the ceiling or floor. All models come with DC fan motors, DC rotary compressors, and programmable systems.

Mitsubishi Electric ducted air conditioners

Mitsubishi Electric offers several series of ducted air conditioners with various models:

Ceiling-Concealed Air Conditioners (7.1kW-14kW). Lightweight with a low profile and a wide range of fan speeds.
Ducted Air Conditioning (10kW-14kW). Quiet operation with high airflow due to high static pressure, available in single-phase or three-phase options.
Ducted Air Conditioners (10kW-14kW). Features a two-piece construction and is available in single-phase and three-phase power options.
Ducted Air Conditioners (16kW-19kW). High airflow and high static pressure, with single-phase or three-phase power options.
Ducted Air Conditioners (22kW). The largest unit is designed for higher heating and cooling capacities and has a three-phase power supply.

Features: Suitable for multiple-room applications, they allow zone selection if needed, and allow you to adjust the distance between the air intake and outlet vents to optimise airflow.

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