NatHERS star bands show the heating and cooling energy demand per unit area of a house. For instance, a 6 Star house in Melbourne has a maximum of 32 kWh per m2 of indoor areas.
- 0 star house means the building fabric does nothing to maintain comfort levels inside the house
- 5 star house is the comfort level you feel in a typical house in Victoria at 2000s.
- 6 star house is the minimum requirement for houses before October 2023 in Victoria (subject to NCC 2019 requirements).
- 7 star house is the minimum requirement for houses after October 2023 in Victoria (subject to NCC 2022 requirements).
- A green 10 star house essentially requires no artificial heating or cooling energy
Note that NatHERS star bands or values differ with the location to account for local climate variations.