multi-zone climate zones 4

https://aged-wiki.win/index.php/Achieving_Year-Round_Comfort_with_Energy-Efficient_Ducted_Cooling

Multi-zone climate zones let you set different temperatures in different parts of your home. For instance, the upstairs bedrooms can stay cooler at night while the living room stays warm for early risers. It's a practical way to balance comfort and energy use, especially if your house has rooms that heat up or cool down differently.