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

When to contact Who?

The NatHERS Administrator receives all kinds of queries in our mailbox. In the 2017-18 financial year around 200 email enquiries were received and responded to. However, the NatHERS Administrator is not always best placed to respond. To understand where to direct your enquiry, a quick reminder is provided below:

 1. Contact the NatHERS Administrator at for:

  • How to become a NatHERS Assessor.
  • Issues for the NatHERS Technical Advisory Committee or NatHERS Steering Committee.
  • Questions about how the Scheme works including accreditation of AAOs, software tool providers or updates to the Chenath Engine.
  • Questions about content on the website
  • Interpreting the NatHERS Technical Note.
  • Reporting of potential breaches of any NatHERS Policies.
  • Feedback or clarification on the content in the NatHERS Assessor Handbook.

2. Contact an Assessor Accrediting Organisation (AAO) for:

  • How to become a NatHERS Assessor.
  • Applying to become a NatHERS accredited assessor.
  • Finding a NatHERS accredited assessor.
  • Questions regarding Assessor Code of Practice and assessor continuing professional development (CPD) requirements/activities.

There are two AAOs currently operating in Australia:

3. Contact your state and territory building authority for:

  • Issues to do with compliance with the building code and/or NCC.
  • Advice on how NatHERS is used for regulatory purposes.
  • Questions about the reference building verification method.

The ABCB lists who the relevant State and Territory Building Administrations are in each jurisdiction here.