What Size Air Conditioner Do I Need?

When it comes to keeping our homes and offices comfortable and cool, having the right size of air conditioning unit is key. An air conditioner that is too small won’t effectively cool the space, while an air conditioner that is too big can cause humidity issues and result in high energy bills.

If you’ve ever wondered, “what size air conditioner do I need,” we’ve compiled everything you need to know.

technician installing a split type AC

Understanding Air Conditioner Sizes and What’s Best for You

When choosing the right size air conditioner for your space, it can be helpful to understand the different types and what they’re best suited for, including:

  • Split-system – Best suited for single-room cooling, which may not be suitable for larger homes or multi-room setups.
  • Multi-split system – Great for multiple rooms situated close together. They may not be as energy efficient as split systems and can be costly to install.
  • Ducted – Ducted air conditioners are designed to cool or heat an entire property. Ducted ACs are ideal for larger homes, multi-story buildings, or commercial spaces.
  • Wall-mounted – Like split systems, these are best for open-plan or single rooms. They are generally less expensive but are visible on the inside of the wall.

Measuring Your Room To Determine Air Conditioner Size

Measuring the size of your room is an easy way to find the right size air conditioning unit for your room. Measure the length and width of each room, then multiply the two numbers together to get the square footage. This will help you determine the air conditioner size you need for each individual room.

You can use our free AC Size Calculator to quickly get an estimate of the ideal size for you, or take a look at the size chart for AC units based on square footage below.

Room Square Footage Air Conditioner Size (Tons)
10-20 square metres 2.6kW
20-30 square metres 3.5kW
30-45 square metres 5-6kW
45-60 square metres 7-8kW

Other Factors To Consider When Finding the Right Size Air Conditioner

There are several other factors worth considering when choosing the right size air conditioner. These include:

  • Anything in the room that affects the temperature (fireplace, oven, etc)
  • The amount of direct sun exposure
  • The geographic climate and average temperatures
  • The quality and number of windows and exterior doors
  • Your home or office construction materials. ( brick, wood, etc.)

The Importance of Choosing the Right Size

An air conditioner that is too small for your space won’t be able to keep up with the demand of cooling your room. This can lead to a constantly running unit and higher energy bills. Moreover, smaller systems may not be able to remove humidity from the air, leaving the area damp and susceptible to mould and mildew. On the other hand, an air conditioner that is too big for your space will cool the air too quickly and shut off before properly removing humidity from the air, which increases your energy bills

Easy Cool Air is a proud Australian company that provides sincere, trustworthy and unbiased advice about all your air conditioning needs. Contact us today to find the perfect air conditioning system for your space.