How does the Zone Energy Rating label (ZERL) Help you Select the Right Air Conditioner?
Picking the right air conditioner can make a big difference in keeping your home or office comfortable while managing energy costs effectively. With so many options available, it’s important to choose a reverse cycle model that not only delivers powerful performance but also operates efficiently. The Greenhouse and Energy Minimum Standards (GEMS) program provides a star rating system to help consumers compare different models based on their efficiency. The higher the star rating, the better the unit performs in terms of energy use, which can lead to long-term savings on electricity bills.
If you’re looking for an air conditioner that balances cutting-edge technology, energy efficiency, and convenience, look no further than the latest Mitsubishi Heavy Industries (MHI) Avanti Plus ®, Avanti® and Bronte® WF/1 Series. The Avanti® and Bronte® series are winners of the Productreview.com.au 2025 split system of the year awards. These new models are reverse cycle, meaning that can heat or cool your space, and come with built-in Wi-Fi, improved GEMS star ratings across select zones, and a range of advanced features designed to provide optimal comfort while ensuring efficient energy use.
Understanding the GEMS Star Rating & Zoned Energy Rating Label (ZERL)
The GEMS star rating is now integrated into the Zoned Energy Rating Label (ZERL), offering a detailed breakdown of an air conditioner’s performance across different climate zones:
- Hot Zone – For areas with consistently high temperatures
- Average Zone – Suitable for moderate climates
- Cold Zone – Designed for regions with cooler conditions
In 2020, the Australian government introduced significant updates to how energy labels are interpreted. For more details, refer to our previous blog article: Understanding New Zoned Energy Rating Labels for Air Conditioners. Since then, all new air conditioners feature the Zoned Energy Rating Label (ZERL) system.
This means instead of a single efficiency rating, you can now make informed decisions based on how well an air conditioner will perform in their specific location. Opting for a model with a higher rating tailored to your climate zone ensures optimal energy efficiency and reduced operational costs.

How to Choose the Right Air Conditioner
When selecting a reverse cycle air conditioner, consider the following key factors to ensure maximum efficiency and comfort:
- Choose a Unit with a High GEMS Star Rating – The new WF1 range of Avanti® and Bronte® WF1 series provide great energy efficiency compared to older models across selected climates, meaning lower electricity costs over time.
- Pick the Right Size – Selecting an air conditioner that matches the size of your room ensures optimal cooling or heating without wasting energy. MHI provides a wall mounted split system with a wide range of capacities from 1.5kW to 10kW to suit different spaces. Refer to our room sizing chart for more information.
- Opt for Inverter Technology – Inverter-driven models like the Avanti Plus®, Avanti® and Bronte®, adjust power usage based on demand, preventing energy waste and maintaining a stable room temperature.
- Consider Smart Features – Built-in Wi-Fi connectivity, as found in the new WF/1 series, enhances control and scheduling options, making it easier to manage energy use. Other functions like timers and the motion sensor in the Avanti Plus® series can also help.
- Ensure Proper Installation – Even the most efficient unit won’t perform well if it’s incorrectly installed. Always use a qualified professional to set up your air conditioner for the best results.
What advanced features do the new MHI WF/1 series offer? Mitsubishi Heavy Industries is known for its award-winning air conditioning solutions. Here’s why the new WF/WF1 range is the perfect choice for your home or office.

Built-in Wi-Fi for Seamless Control
The Avanti Plus®, Avanti® and Bronte® WF1 series now come with integrated Wi-Fi, allowing you to control your air conditioner from virtually anywhere using the Smart M-Air app. Adjust settings, set schedules, and monitor energy usage directly from your smartphone for enhanced convenience.
Advanced Inverter Technology
The DC PAM Inverter technology in the Avanti® and Bronte® WF1 series ensures precise temperature control while minimising energy use. Inverter models adjust compressor speed based on cooling or heating needs, resulting in more consistent comfort and lower electricity bills.
Optimised for Australian Climates
Thanks to the Zoned Energy Rating Label (ZERL), consumers can easily see how the Avanti Plus®, Avanti®, and Bronte® WF1 series perform in hot, average, and cold climates, making them suitable across different Australian conditions.
NOVAShield™ PM2.5 Air Filtration for Better Air Quality
The Avanti® and Bronte® WF1 series come equipped with NOVAShield™ PM2.5 filter, which effectively captures fine particles, allergens, and dust. This ensures cleaner, healthier air for your space, which is especially beneficial for those with allergies or respiratory concerns.
What Now?
Choose the energy-efficient reverse cycle air conditioner that’s right for you, bringing balance between performance, cost savings, and reliability. The GEMS star rating and Zoned Energy Rating Label (ZERL) provide an easy way to compare models and select the best unit for your specific climate.
With the latest MHI Avanti Plus®, Avanti® and Bronte® WF1 series, you get a powerful yet energy-efficient solution that not only keeps your home or office comfortable but also helps manage electricity costs. Thanks to built-in Wi-Fi, improved GEMS star cooling ratings, and Clean Air Technology, these models offer the perfect combination of efficiency, convenience, and reliability.
So, if you’re looking for a smarter, more efficient way to stay comfortable year-round, the new Avanti Plus®, Avanti®, and Bronte® WF/1 series are the ideal choice! Request a quote with the form below, and your local MHIAA dealer will reach out to you.






