Choosing the right split system air conditioner isn’t just about getting cool or warm air—it’s about finding the perfect fit for your room’s specific needs so you can be big on comfort and small on bills. An appropriately sized unit saves energy, maintains comfort, and keeps your bills down. Here’s our split system guide on how to determine the right capacity, factoring in room size, insulation, and climate
Match capacity with room size
The capacity of your split system, measured in kilowatts (kW), is a major factor in achieving the right indoor climate. For small bedrooms or studies (up to 20 square metres), a 2.5kW system usually does the job. For medium-sized rooms, like a home office or living room (20-40 square metres), a 3.5-5kW system is ideal. Larger areas, like open plan living or houses looking for a ducted alternative will require a 7.2kW system.
2. It’s good for the environment
Reducing energy consumption doesn’t just benefit your wallet; it’s a powerful way to help the environment. Energy-efficient systems use less power, which lowers your emissions and carbon footprint. By choosing these upgrades, you’re not only cutting costs but also helping to support state, national and global environmental goals.
Quick Guide:
Small rooms (up to 20 m²): 2.5kW
Medium rooms (20-40 m²): 3.5kW
Large rooms (40+ m²): 7.2kW
Energy efficiency and your budget
Choosing a split system with a good energy efficiency rating will help keep running costs down. Emerald’s split systems offer advanced energy-saving technology, reducing power usage without compromising performance. By selecting an energy-efficient model and the right size, you’ll save in the long run, both financially and environmentally.
Consider insulation and room features
A well-insulated room requires less energy to heat or cool. Insulation in walls, floors, and ceilings minimises heat exchange, helping the air conditioner work more efficiently. Other factors, like the presence of large windows or doors, can also affect performance. For example, rooms with extensive glass that are exposed to direct sunlight may need a larger unit than their size alone would suggest. For these scenarios, opting for a unit with a slightly higher kW rating can ensure consistent comfort – speak to an accredited installer for information tailored to your needs.
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