Arrangements which govern critical aspects of Australia’s leading energy rating scheme for houses are far from optimal and need a significant overhaul, a key person within the nation’s building industry says.

Speaking on condition of anonymity, a source has called for substantial change in the way in which the National Housing Energy Rating Scheme (NatHERS) is being run across a number of areas. First, there is the appointment of managers. Under the current scheme, the national administrator who oversees the scheme…