Articles in this issue


Welcome to the seventh edition of the NatHERS Star!

This year's achievements

It has been another busy year for the NatHERS Administrator.

NatHERS Stats

Recent data on the NatHERS Certificate.

Fraudulant NatHERS Certificates

Recently the NatHERS Administrator has received, and been following up on, a number of NatHERS Certificates that have been suspected to be fraudulent.

NatHERS Assessor Handbook

The production of the NatHERS Assessor Handbook is well underway.

NatHERS at Sustainable House Day

Sustainable House Day was held on Sunday 16th September 2018.

Modelling obscure glass

It has been brought to the attention of the NatHERS Administrator that there is industry confusion as to how to correctly model obscured glass in NatHERS accredited software tools.

Update on Windows

The NatHERS Administrator continues to actively work on improvements to address concerns regarding windows.

Chenath updates for 2019

The Australian Building Codes Board (ABCB) have approved the following updates for the Chenath engine in line with the 2019 update to the NCC.

Trajectory for low energy homes

Australian governments are advancing the energy performance of residential and commercial buildings through the development of a Trajectory for Low Energy Buildings.

When to contact Who?

A quick guide on where to direct enquiries.

NatHERS myth buster: thermal mass

An insight into the thermal mass formulas used by the NatHERS calculation engine. 


  • Your Home
  • BDAV 2018 Design Awards

NatHERS Stats

The NatHERS certificate data captured by the CSIRO in conjunction with Sustainability Victoria from September 2017 – September 2018 shows:

Building Class             Number of Certificates
Class 1 146,911
CLass 2 69,945
Class 4 83
Total: 216,939







And did you know?


  • An average Class 1 dwelling for this period was 6 stars, 146.5m2 and predicted to use 27.43 MJ/m2 cooling and 86.31 MJ/m2 heating.

  • An average Class 2 dwelling for this period was 6.3 stars, 74.8m2 and predicted to use 22.92 MJ/m2 cooling and 40.27 MJ/m2 heating.

  • At the end of the 2017-18 financial year there were over 600 NatHERS Accredited Assessors nationally.