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Assessor Information

Assessor Information

Once the application for accreditation as a TPA is approved, the applicant will receive from BDAV:

  • a letter confirming that they have been approved as an accredited thermal performance assessor;
  • an accreditation number for the sole use of the accredited TPA;
  • a certificate confirming the applicant’s status as an accredited thermal performance assessor;
  • a listing at the BDAV website in the Find a Thermal Performance Assessor section

BDAV also provides a Technical and Support Help Desk for use by accredited TPAs. To access this service, accredited TPAs should email their queries to, and can expect a response typically within 24 hours of the BDAV receiving the enquiry.

Industry Information

Current NatHERS Technical Notes for use with Chenath Engine v3.13:

NatHERS Technical Note 1 – Software Modelling Principles: CLICK HERE
Zoning Guide: CLICK HERE

For older version see the NatHERS website.

To view the Tasmanian Director of Building Control's bulletin on BCA2013 and 6-Star Energy Efficiency Requirements at 1 May 2013, CLICK HERE