Is that much insulation and triple glazing really necessary in Australia?

This construction method doesn’t only protect you from cold in winter it also protects you from the heat in summer. It has proven itself to be extremely effective in Mediterranean climates.
The main aim is to keep a consistent temperature in every room of the house all year round regardless what the weather is like outside and what time of the day/night it is.

To achieve this goal a consistent insulation envelope and airtight barrier, passive house certified windows and an Energy recovery ventilation are necessary.