Air Con Size Calculator

Our air conditioning size calculator gives you a quick estimate of the cooling and heating capacity your room requires. Enter your room dimensions and insulation level and you will get a recommended kilowatt range so you can choose the right system with confidence.

Disclaimer:
This is an estimated guide only based on Perth average conditions, heat loads and manufacturer ratings.

Our Air Con Size Calculator

Simply provide some details about your home below to determine your ideal split system size.

The Correct Air Con Size Matters

Selecting the right sized split system saves money, improves comfort and increases the lifespan of your unit.

Better comfort
A correctly sized system cools and heats the space evenly without temperature swings.

Lower running costs
Systems that match the room size do not waste energy. This keeps power bills manageable.

Longer system life
Oversized and undersized units work harder than they should. Correct sizing reduces strain on the compressor and other components.

Faster performance on extreme days
Perth summers can be harsh. The right sized system can reach and maintain temperature more efficiently.

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FAQs

How accurate is the split system size calculator?

The calculator provides a reliable estimate based on room size, ceiling height, insulation and window exposure. It is designed for everyday homes in Perth. For exact sizing, we recommend a quick in home assessment by our technicians.

Can I choose a larger system just to be safe?

Oversizing is not recommended. A system that is too powerful can short cycle which increases energy use and reduces comfort. It is always best to match the unit to the room size.

What information do I need to use the calculator?

You will need your room’s length, width, ceiling height and an idea of your insulation level. If you are unsure, choose the closest option and our team can confirm the details later.

What happens if I install a system that is too small?

An undersized unit may struggle on hot Perth days, run constantly and increase your power bills. It may also wear out sooner because it is always working at full capacity.

Is the calculator suitable for open plan areas?

Yes, but you should measure the full open space, not just the main sitting area. Large open plans often need higher capacity systems or multiple units.

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