Can I use NatHERS Rating for any building?

NatHERS rating is an assessment method for small and medium-sized dwellings and apartments (Class 1a and Class 2 buildings). However, it is better to use Verification Method for big houses with complex geometries. This is largely due to the fact that the NatHERS floor area correction factor for large houses works against your benefit. This may increase the building’s construction costs (for example: the requirement of expensive windows).

Other building types, like board houses (Class 1a), hotel rooms or dormitories (Class 3) cannot use NatHERS star rating method.