What size air conditioner do I need?

Air conditioners are, without a doubt, an expensive investment, but one of the main mistakes clients make is to buy the wrong size. Buying the wrong size for your property can be the root cause of overspending, and we want to help you avoid that. Every room that needs air conditioning is different, so it’s a good idea to consult an expert as well before making a purchase. Speak to a licensed Gold Coast electrician to choose the perfect size air conditioner. We’ve put together this guide to help you better understand what size you need for your property. 

How to calculate the right air conditioner size?

It’s important to get a unit that fits your home because you want it to do its job of keeping you cool effectively. This means that you can’t get a 5kW system to cover extensive areas of 90m2. The first thing you need to do to get started is to measure the room by multiplying the length and width. You can then multiply that total by 160 watts, and you will have a more accurate estimation of which size air conditioner you need for that room. An expert can do this better than anyone else. Professional electricians on the Gold Coast will take into consideration the climate, windows and factors in the ceiling’s overall height. Have a look at this table to help you…

10m2 to 25m22.5 kW
25m2 to 35m23.5 kW
35m2 to 60m25-6 kW
60m2 to 85m27-8.5 kW
60m2 to 85m27-8.5 kW
85m2 to 95m29-9.4 kW


What can affect the size of the air conditioning unit you’ll need?

  • The size of the room

The first and most important thing is the size of the room. What’s the length, width and ceiling height? You’ll have to calculate that and factor in other things like how a room with high ceilings will require more energy to cool.

  • The insulation 

Do you already have some insulation built into your property’s structure? If not, it could make the entire installation different in size to make up for it. 

  • The location of your property

In which part of Australia is your property because they all have their climate types. A room in Darwin will need a more powerful air conditioner than the same room in an area like Hobart. This could even affect the chances of repair or replacement of your unit in the future. 

  • The orientation of your property

Unbelievably, the direction that the room faces will change what capacity air conditioner you need. North facing rooms with windows can let in a lot of heat in the summer, but south-facing rooms that are cooler and get more shares will need less air conditioning capacity. 

  • The property’s purpose 

The size of air conditioning needed in office areas is way different than for your homeroom. Small spaces in an office could need larger units because they are made of other materials and rarely have insulation. 

We’re licensed for air conditioning installation in the Gold Coast

The team at Powertrip Electrical is experienced in both residential and commercial fittings in Gold Coast, Helensvale, Broadbeach, Bundall, Mermaid Beach, Palm Beach, Nerang and Burleigh Heads