NatHERS house ratings use computer simulations to determine the potential thermal comfort of Australian homes on a scale of zero to 10 stars. The more stars, the less likely the occupants will need cooling or heating to stay comfortable.
There are four software tools accredited under NatHERS, each with different user interfaces and functions. If you are completing energy ratings in accordance with NatHERS methods, you will need to decide which tool best meets your needs.
Obtaining a NatHERS rating at the required star level is specified in the National Construction Code (NCC) (link is external) as one of the ways of demonstrating compliance with the energy efficiency (thermal performance) requirements for new houses and apartments.