What’s the Best 3.5kW Split System in Australia

Split system air conditioners are the most popular for Aussie homes due to their efficiency, quiet operation, and year-round cooling and heating. 

You’re here because you’ve worked out that a 3.5kW system is the best fit for your room, right?

Congrats — you’re one step down! We know how overwhelming it can be to sift through all the models on the market to choose the one for your needs and budget. 

Well, here at Hello Breeze, we’ve done the hard yakka for you! We’ve compiled a list of the most popular, trusted brands that can take on our climate.

First, let’s make sure we’re on the same page about this type of system.

What is a Split System Air Conditioner?

A split system air conditioner uses liquid refrigerant to cool or heat the air. It comes in two separate parts — an indoor and an outdoor unit.

The indoor unit mounts on the wall inside your home, distributing air throughout the room. The outdoor compressor unit directs the refrigerant to and from the indoor unit. 

Room sizeExampleCapacity 
Up to 20m2Bedroom, study, small kitchen2 to 2.5kW
From 20 to 40m2Bedroom with an ensuite, small lounge2.5 to 5kW
From 40 to 60m2Large bedroom, mid-sized lounge4 to 6kW
60m2 and aboveOpen-plan areas, large lounge5 to 9kW

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If you have an extra-large space or want to heat and cool multiple rooms in your house, consider a ducted reverse cycle system.

Now, let’s crack on and compare 3.5kW split systems on the market in 2022.

The Best 3.5kW Split Systems in Australia

Rinnai Inverter split system Q Series 

Rinnai’s 3.5kW split system offers a sleek contemporary design, Wi-Fi control, quiet operation, and a self-cleaning function. And they’re perfect for tackling our volatile climate.


Model: HINRQ35B / HONRQ35B

Cooling/Heating capacity: 3.4kW / 3.5kW

Noise Level:  26-50 dBA

Warranty: 5 years

Rinnai 3.5kw split system

Why You’ll Love It

✓ 5-star heating and cooling 

✓ Heats and cools with outdoor temps ranging from -15°C to 52°C

✓ Two-way temperature control mimics the outdoor ambient temperature at night for a comfy snooze

✓ The outdoor unit runs an anti-frost operation to ensure high-performance heating

✓ Self-Diagnosis capabilities display an error code in the case of malfunction

✓ The self-cleaning operation removes excess moisture when switched off to extend the unit’s life and ensure maximum hygiene

Visit the manufacturer’s website or our product page for more information. 

Mitsubishi Electric Reverse Cycle AP Series

A Mitsubishi Electric’s 3.5kW split system is engineered for high performance and offers value for money, low running costs and a whisper-quiet operation. 


Model: HINRQ35B / HONRQ35B

Cooling/Heating capacity: 3.5kW / 3.7kW

Noise Level:  19-45 dBA

Warranty: 5 years

Mitsubishi Electric Reverse Cycle 3.5kw split system

Why You’ll Love It

✓ Uses energy-efficient R32 refrigerant 

✓ High-speed heating and cooling

✓ Control from your phone, laptop, tablet, smart-watch, or computer 

✓ Night Mode eliminates bright LEDs and operational noises for uninterrupted slumber

✓ Dual Barrier Coating reduces dirt and dust build-up for cleaner, fresher air

Visit the manufacturer’s site or our site for more info. 

Samsung Reverse Cycle Bedarra Series

Installing a Samsung 3.5kW split system in your home means you’ll have a blissful escape from the harsh Aussie climate. These little beauties can operate effectively when it’s as high as 50 °C outside or down to -15 °C.



Cooling/Heating capacity: 3.45kW / 4.02kW

Noise Level: 35-50 dBA

Warranty: 5 years

Samsung  3.5kw split system

Why You’ll Love It

✓ Energy-efficient cooling

✓ Reaches set temperature quickly

✓ Sleep functions maintain a comfortable airflow direction and fan speed, so you don’t wake up freezing to death

✓ This Demand Response Enabled Device (D.R.E.D.) allows you to limit your power consumption during peak periods to save money on your power bill

See our product page for more Samsung product information.

Fujitsu Reverse Cycle Lifestyle Range

Fujitsu is one of Australia’s favourite air conditioning brands. Their Lifestyle 3.5kW split system is so clever; it can detect human movement and adjust the temps accordingly to save power.



Cooling/Heating capacity: 3.5kW / 3.7kW

Noise Level: 19-42 dBA

Warranty: 5 years 

Fujitsu 3.5kw air conditioner in Melbourne

Why You’ll Love It

✓ 4.5-star rating in cooling mode

✓ Reaches set temperature quickly

✓ Ultra energy-efficient 

✓ Compatible with the Air Conditioning Demand Response program

✓ Washable Apple-Catechin Filter absorbs dust and allergens

✓A long-life Ion Deodorisation Filter removes odours from the air

Find out more about our Fujitsu air conditioners here or visit the manufacturer’s site.

Mitsubishi Heavy Industries Reverse Cycle Avanti PLUS® Series

MHIAA has been awarded Australia’s best air conditioner for the third year running by CHOICE®. Enjoy a super-quiet air conditioner that’s also highly efficient, thanks to the same technology used by jet engine manufacturers — CFD (Computational Fluid Dynamics).



Cooling/Heating capacity: 3.5kW / 4.3kW

Noise Level: 19-43 dBA

Warranty: 5 years 

Mitsubishi Heavy Industries Split system

Why You’ll Love It

✓ Whisper-quiet operation

✓ Adjustable LED brightness

✓ An energy-saving motion sensor automatically adjusts the set temperature

based on human movement

✓ Clean Air Technology captures and naturalises smoke particles, allergens, odours and bacteria for cleaner, fresher air

Visit the manufacturer’s site or check out our MHIAA models here

Daikin Reverse Cycle Alira X Series

Enjoy industry-leading energy efficiency with Daikin 3.5kW split system units, which are approved by the National Asthma Council Australia.



Cooling/Heating capacity: 3.5kW / 3.7kW

Noise Level: 19-42 dBA

Warranty: 5 years 

Daikin Split System Air conditioner

Why You’ll Love It

✓ Set the temperature in 0.5°C increments

✓ Backlit wireless remote controller

✓ The unit’s louvres stream air along the ceiling for a more extended reach to deliver fast cooling and even temperature distribution

✓ A 2-area infrared Intelligent Eye sensor detects motion and switches into an energy-saving mode if the room is unoccupied for 20 minutes

✓ Streamer Technology generates high-speed electrons to destroy harmful substances, odours, bacteria and indoor air pollutants for superior air purification

✓ Built-in Wi-Fi

Visit the manufacturer’s site for more product information.

How to get one?

Select the best air conditioner for your space, then check out our split system air conditioning installation guide and super-easy booking process.

Or, if you want to chat to us about a split system air conditioning installation in your home, give us a jingle on 1300 712 732.

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