Key Questions to Ask When Buying a New AC Unit
- Colin Ruscoe
- Oct 17, 2025
- 4 min read
Buying a new air conditioner can be one of the biggest investments you'll make in your home's comfort. With so many options out there, the secret isn't just finding the best price - It’s about picking a reliable system that’ll keep you comfortable for years to come.
Here’s a simple checklist to help you ask the right questions before you buy a new ac unit - whether you’re chatting with your installer, doing your own research, or just trying to make sense of all the options.

Who is the Manufacturer? (Brand Reputation)
Choosing the right air conditioner starts with knowing who makes it. A well-known brand may feel reassuring, but it’s worth digging a little deeper to see how committed the company actually is to air conditioning in Australia.
Do They Specialise in AC?
Some brands focus 100% on heating and cooling, while others add AC to a wider range of appliances. Brands specialising in AC usually invest more into research, performance, efficiency, and long-term reliability.
How Long Have They Been in Australia?
Longevity often signals stability and a strong commitment to supporting the Australian market. A company with a strong local presence can mean better support, readily available spare parts, and dependable service networks.
What does the Warranty Cover?
Check the details of the manufacturers warranty before you buy:
What does it include - parts and labour?
Will it cover what you want to use if for i.e. server rooms?
How long is the warranty period?
Is the warranty transferable? Does it transfer to the new home owner if you sell your property?
Who Handles the Warranty?
If something goes wrong, who do you call? Knowing this upfront can save a lot of time and hassle later. Always keep a record of where it was purchased and who installed it in case the business is no longer operating when problems arise.
Will I be Able to Get Spare Parts After the Warranty Ends? (The Parts Question)
Before committing to a brand, ask how long they typically keep parts in stock for their models. All manufacturers will ensure suitable repairs during the warranty period but if the model wasn’t very popular, or if the manufacturer’s business model is tailored around replacements rather than repair - it could make for an expensive exercise should you experience issues after the warranty ends.
Choosing a brand that supports its products long-term gives you a better chance of repairing rather than replacing your unit in the future.
How Much Will it Cost to Run? (Energy Efficiency)
The upfront price is one thing - but the running costs can really add up overtime. And with our ever increasing energy costs, a more energy efficient system is vital to keeping costs down.
Meet ZERL: The new Zoned Energy Rating Label (ZERL) shows how your AC performs in different climates. It’s a big step up from the old star system and gives a more realistic idea of how your unit will perform and what is the estimated cost to run where you live.
Check Your Climate Zone: When comparing models, make sure you’re looking at the rating for your specific climate zone. This ensures you get the most accurate energy consumption - What’s perfect for Darwin might not suit Melbourne.
Who is Installing my New AC? (Installation Matters!)
Even the best aircon unit can fail early if it's installed poorly. Your installer can be just as important as the unit itself! Here are a few things to check before you go ahead:
Check Your Tradie: Always make sure your installer is fully licensed for your state or territory as each state does have different requirements. Using an improperly licensed tradesman can void your manufacturer's warranty and may lead to costly issues down the track.
Do Your Own Research: Some installers or builders recommend brands they prefer - which may not align with your needs and wants. Doing a quick check yourself to make sure the recommended brand and model is really the best fit for your home, will give you peace of mind.
Essential Guide to Choosing an Energy-Efficient Air Conditioning Unit can help you understand how to compare units based on your needs and wants.
Installation Warranty: Ask about the installer's guarantee: Is the installation work covered by its own warranty, and for how long?
Preventative-Maintenance: Do they provide regular preventative maintenance visits to keep your unit working as efficient as possible and to protect your investment?
After Sales Support: Do they provide support on how to use your air conditioning system or advise on the best usage - or will they leave it up to you to contact the manufacturer or trust Google?
Final Thoughts - Buying a New AC Unit
Choosing a new air conditioner isn’t just about picking a brand name or chasing the best deal. By asking the right questions about the brand, spare parts, efficiency, and installation, you’ll set yourself up with an AC that runs reliably and gives you great value for years to come.
If you’re unsure where to start or want expert advice, our friendly team is here to help. Call National AC Parts on 1300 904 554 or email info@nationalacparts.com.au. We will help you find the right system - for you.
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