All Australian States and Territories require new homes to meet minimum thermal performance standards. The overall regulation requiring Building Thermal Performance Assessment ratings is the Building Code of Australia (BCA), applicable in all states except NSW, where BASIX is the regulation in force.

These regulations have competency requirements for the practitioners that carry out Building Thermal Performance Assessments. The Building Code of Australia (BCA) requires that Local Building Approval Authorities obtain evidence that all mandatory minimum energy ratings are carried out by ‘suitably qualified persons’. In NSW the BASIX regulation requires ‘Thermal Comfort Simulation’ ratings to be carried out by ABSA Accredited Assessors.

To this end, ABSA has developed a National Accreditation Scheme to ensure ABSA accredited assessors meet all national BCA as well as BASIX requirements. The Nationwide House Energy Rating Scheme (NatHERS) website provides some further background.

HERS - State by State

Source:http://www.absa.net.au