What Size Air Conditioner Do I Need?

What Size Air Conditioner Do I Need?

When the weather starts to heat up, it’s time to start thinking about air conditioners. Choosing the right size air conditioner for your home is essential, or you could end up with a unit that is too large or too small. Below, we will discuss choosing the right size air conditioner for your needs.

There are a few things to consider when choosing the right air conditioner for your home.

Air Conditioner In Bedroom

Room Size

Each room in your house will demand a different air conditioning capacity. Generally, 0.12 to 0.15 kilowatts of power are required per square meter of floor space. This is computed by multiplying the length of a room by its width in meters. Ceiling heights must also be considered in your calculations, as rooms with higher ceilings will always require more energy to cool.


The insulation you have installed in the walls and ceilings of your home is there to either slow down or stop the flow of heat. Insulation improves your home’s energy efficiency by preventing heat from escaping during the winter months and enabling heat to enter during the warmer summer months. The R-value of a product is a measurement of how well it can stop the flow of heat through it. The R-value of a building is directly proportional to how well it is insulated. When choosing the right size air conditioner for your home, you should consider whether or not your property has adequate insulation. If your home does not have adequate insulation, your air conditioner may have to work harder to keep the temperature comfortable.


Your home’s location will influence your cooling and air conditioning capacity requirements. If you live in a subtropical temperature zone with hot and humid summers, such as Cairns or the Sunshine Coast, you’ll probably require a more powerful air conditioner than someone who lives in a temperate climate zone.


The room’s orientation might also impact the size of the air conditioner you need. If the orientation of your home is such that it receives a lot of sun in the afternoon, you might require a more robust system to counteract the increased temperature.

These are a few things to keep in mind when choosing the right size air conditioner for your home. Be sure to consider the room’s square footage, the insulation of your home, and your location. With these factors in mind, you’ll be sure to find an air conditioner suitable for your home.

If you’re unsure what size air conditioner you need, call us, and we can help you find a suitable unit for your home. We can also provide you with a free quote for installation. Give us a call today.