Air Conditioning Size Calculator

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•For a room 10m2 to 20m2, a 2.6kW unit should cool/ heat the room;
•For a room 20m2 to 30m2, a 3.5kW unit should cool/ heat  the room;
•For a room 30m2 to 45m2, a 5-6kW unit should cool/ heat the room; and
•For a room 45m2 to 65m2, a 7-8kW unit should cool/ heat the room.

If you have any questions or want to know more, contact It's A Breeze - Air Conditioning Wholesale & Delivery before making your final choice. Our friendly, knowledgeable team members can help you find the right solution for your home and budget. 

Using a formula to estimate your air conditioning needs is quick and easy, but it’s also very rough and doesn’t consider many of the important factors outlined above. It’s an excellent way to get a general idea of your needs. Still, if you’re after a truly accurate understanding, it’s probably best to use one of the other two methods before you commit to anything.

To estimate the amount of air conditioning you will need for your daytime living area, you will first need to determine its area. You will need to find the length and width of each room and multiply them. Then, you have to add the area of each room together for the total. This figure needs to be in square metres.

What you do next will depend on your ceiling height:

• If your ceiling is 2.4m high, you will need to multiply the daytime living area (m²) by 150 (watts)
• If your ceiling is 2.7m high, you will need to multiply the daytime living area (m²) by 160 (watts)
• If your ceiling is 3m high, you will need to multiply the daytime living area (m²) by 175 (watts)

These calculations will give you the number of watts you need, and you can then move the decimal point three points to the left to convert it to kilowatts.

As an example:

For a house with a daytime living area of 100m² and a height of 2.4m, the calculations would be:

• 100m² x 150 watts = 15,000 watts
• 15,000 watts = 15 kilowatts
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A 15kW unit is roughly the right size for this house.

Using our online calculator above will give you a more accurate estimate than the above method. Use the calculator above to help you figure out the number of kilowatts you will need. 

The most accurate way to find out the air conditioning capacity that you will need for your home is by getting a professional to come in and calculate it. They have years of experience, which they can use to get the most accurate estimate of your air conditioning needs. They will consider each factor and help ensure that you have the perfect sized air conditioner for your home. Contact us today for a FREE measure and quote!