Wall-Mounted Air Conditioners: Everything You Need to Know in 2022

Wall-mounted air conditioners are also known as ductless, reverse-cycle or split system air conditioners.

They’re one of the most popular air conditioning systems found in modern Aussie homes. But! They’re not to be confused with the noisy, bulky, through-wall rattlers of the ‘80s.

Today’s wall-mounted units are sleek, sophisticated and sexy. Plus, we can enjoy kick-ar*e functionality such as smart connectivity, inverter technology and whisper-quiet operation.

So, why are wall-mounted air conditioners the bee’s knees? We’ll answer the most frequently asked questions about these little beauties.

Wall-Mounted Air Conditioners: Everything You Need to Know in 2022

Are wall-mounted air conditioners good?

Wall-mounted air conditioners and heaters are a great, energy-efficient option for cooling a single space, such as a bedroom or a living room. 

One of their most attractive features is their ability to heat and cool. Giving you the ultimate 2-for-1 deal for year-round climate control.

Plus, modern units automatically adjust the compressor speed according to the room’s requirements using inverter technology and sensors. This is cracking news for your electricity bill and the environment. 

What’s more, they’re also cheaper to install than ducted reverse cycle systems.

Here are some more benefits of wall-mounted air conditioners:

  • Many feature an automatic defrost cycle, so if the temps drop down to minus 15ºC, the system will still heat your home effectively
  • High-efficiency in energy consumption, heating and cooling
  • Air purifiers filter dust, smoke, odours, bacteria, viruses and pollutants
  • Silent operation
  • Use eco-friendly R32 refrigerant, and produce one-third of the greenhouse gas emissions of a standard electric heater
  • Generate indoor heat safely, especially with curious nippers and pets around
  • Enjoy a long life span with regular cleaning and maintenance

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How does a wall-mounted air conditioner work?

How does a wall-mounted air conditioner work?

Wall-mounted air conditioners consist of two units. An indoor evaporative heat exchanger mounted on your indoor wall, and an outdoor condensing heat exchanger.

So, exactly how does a wall-mounted air conditioner work? Well, in cooling mode, the refrigeration cycle works as follows:

The Evaporator

A fan extracts air from inside your home and passes it over a coil filled with cold, liquid refrigerant. The refrigerant absorbs the heat and sends cool, clean air into your home.

The Compressor

The now low-pressure, low-temperature liquid refrigerant is then compressed and converted to a high pressure, high-temperature gas.

The Condenser

The fan then transfers the gas to the outdoor condensing heat exchanger, cooling and liquefying the refrigerant gas.

Expansion valve

The refrigerant then flows through the expansion valve to create a low-temperature, low-pressure refrigerant, which absorbs the heat as it returns to the evaporator. 

And the cycle repeats.

Do wall-mounted air conditioners need to be vented?

No. A wall-mounted air conditioner requires no venting because it creates zero fumes.

Are wall-mounted air conditioners expensive to run?

Wall-mounted air conditioners are not as expensive to run as you’d think. In fact, they’re more cost-effective in the long run.

The average wall-mounted air conditioner costs around $0.25 to $0.35 per hour to run in cooling mode. It costs around $0.13 to $0.36 per hour in heating mode.

Let’s compare this to some home appliances. For example, your oven could be costing you up to $1.33 per hour and your clothes dryer up to $3.14.

Check out the government’s energy calculator for a more accurate idea of how much that AC you’ve been eyeing will cost to run.

How much does a wall-mounted AC unit cost?

The cost of wall-mounted AC units depends on the unit price and installation fees. You can find ACs as low as $600, right up to $5500. The price depends on:

  • The brand and model
  • The size and capacity (kW)
  • Smart features such as sensors, eco modes, Wi-Fi and app connectivity 

Here at Hello Breeze, we have a remarkably affordable range of reverse-cycle wall-mounted air conditioners. Plus, we include installation in the price. 

Did you know?

The most significant number of complaints by homeowners installing a new AC unit not working correctly is due to dodgy installation?

So, it pays to get a professional to install your unit—don’t try to save money by installing it yourself.

Speaking of professionals, the Hello Breeze team of licensed and insured installers will always: 

  • Be punctual 
  • Install quickly and efficiently
  • Take our rubbish with us. And won't leave dirty footprints!
  • Provide a certificate of compliance upon completion; and
  • Give you a full product demonstration, so you’re good to go!

But don’t take our word for it! Read our 5-star reviews from real customers - not our mums.

What size wall-mounted air conditioner do I need?

If you’re unsure what size system you need, here are some guidelines: 

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

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

How long do wall-mounted air conditioners last?

With regular maintenance, wall-mounted air conditioners can last 15-20 years. 

How long do wall-mounted air conditioners last?

With regular maintenance, wall-mounted air conditioners can last 15-20 years. 

Which is better; a window AC or a wall-mounted AC?

Which is better; a window AC or a wall-mounted AC?

Window air conditioners consist of a single unit assembled in a steel casing. The vents are located at the back or the sides of the outdoor unit and work similarly to wall-mounted air conditioners. 

Pros of window air conditioners

  • Cheaper than wall-mounted air conditioners
  • Portable
  • Relatively easy to install yourself

Cons of window air conditioners

  • Cooling capacity is not as powerful as a wall-mounted AC
  • Less energy-efficient, so they cost more to run
  • Noisy
  • Difficult to clean 

How do wall-mounted air conditioners drain?

When a wall-mounted air conditioner cools, it creates condensation. The condensation is removed via the condensate drain. This drain runs outside your home, expelling the liquid condensation onto the ground beside the outdoor heat exchanger.

Do wall-mounted air conditioners also heat?

Yes, wall-mounted air conditioners are reverse cycle systems. They will heat your home in winter and cool it in summer.

How to clean a wall-mounted air conditioner

Here are some basic steps to maintain your air conditioner.

  • Use a damp cloth to remove dust from the unit’s vents
  • Remove and vacuum the dust filters, then rinse with water
  • Use the dry-out setting to remove any excess water on the heat exchanger
  • Vacuum the outdoor unit to remove dust and spider webs
  • Use a piece of wire to check the drains for blockages
How to clean a wall-mounted air conditioner

What is the cost of a heating and cooling system?

Here at Hello Breeze, we’ve got a whole range of heating and cooling systems to suit Aussie homes. 

Our talented team is on-hand to discuss your options to suit your budget, home and lifestyle. We’ll give you a personalised, BS-free recommendation over the phone or during a home visit at a time that’s convenient for you. Or get a quote online.

Then, after your wall-mounted air conditioning installation, a Hello Breeze team member will follow up to check that everything is as right as rain.

But, hey, we know sometimes sh*t happens. And we’re not about to leave you on your Pat Malone! So, if you need additional support, contact us pronto. We’ll get onto it faster than a has-been to an “I’m a Celebrity…Get Me Outta Here” audition.

The Hello Breeze team is here to answer any questions—big or small. Browse all our types of wall-mounted air conditioners and contact us for a quote today! 

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