NatHERS Certificate

Upcoming changes to NatHERS Certificates

From September 2022, updated NatHERS Certificates will be phased in. The updated NatHERS Certificates will include additional information to support the proposed changes to residential energy efficiency for the National Construction Code (NCC) 2022.

The Certificates will continue to include a thermal performance star rating out of 10 to demonstrate compliance with the proposed NCC 2022 Performance Requirement 1. It will also include a new Whole of Home rating out of 100 to demonstrate compliance with the proposed NCC 2022 Performance Requirement 2. This Whole of Home rating combines the thermal performance with the energy performance of home appliances, energy generation and storage.

These changes will assist households to understand their home’s overall energy performance, and help them improve the comfort of their home and reduce their energy bills.

View the draft NatHERS Certificates for 2022

A guide to the NatHERS Certificates

In 2020, the NatHERS Administrator completed major updates to the NatHERS Certificates to improve their usability and structure. The certificate name has also changed from the ‘Universal Certificate’ to the ‘NatHERS Certificate’.

NatHERS Certificates provide a comprehensive and uniform approach to displaying important home energy rating assessment information. The certificates come in two formats:

  1. A certificate that displays the NatHERS logo and can be printed in colour - produced by NatHERS accredited assessors
  2. A certificate without the NatHERS logo and only available in black and white - produced by non-accredited assessors.

After 31 July 2020, only the NatHERS Certificate will be permitted for demonstrating compliance to the NCC NatHERS pathway and it is to be used in association with the new accredited software using the Chenath Engine version 3.21. The Universal Certificate will not be accepted from this date.

NatHERS New Certificate Download
NatHERS Certificate - Accredited 
Thumbnail Non-Accredited New Certificate
NatHERS Certificate - Non-Accredited

All certificates include information on the dwelling’s key design features, building materials and parameters used to generate its star rating. 

A NatHERS Certificate allows builders, certifiers and regulatory authorities to quickly confirm that the building has been built to the design on which the energy rating assessment is based. 

Ten features to look for on a Certificate

  1. Each certificate is unique. A watermark of the address and certificate number is visible on every page. 
  2. The NatHERS Logo is present on certificates completed by Accredited NatHERS assessors.

While it’s not compulsory to be accredited in all states and territories, the logo allows anyone to easily verify that the person rating a home is skilled in completing NatHERS ratings. Certificates without the logo were completed by a rater without NatHERS accreditation.

Ten features to look for on a Certificate

1. Each certificate is unique. A watermark of the address and certificate number is visible on every page. 

2. The NatHERS Logo is present on certificates completed by Accredited NatHERS assessors.

While it’s not compulsory to be accredited in all states and territories, the logo allows anyone to easily verify that the person rating a home is skilled in completing NatHERS ratings. Certificates without the logo were completed by a rater without NatHERS accreditation.

Nathers Star Rating Label

3. Embedded within this logo will be the ‘Star Rating’. This number is the dwelling’s rating shown as a score out of 10. The more stars the home has, the less heating or cooling will be required to keep the home comfortable.

Nathers Label Arch

 

4. The title of the Certificate will include a unique certificate number, date the Certificate was generated and the software and version used.

Header Nathers Certificate

5.    Property details give the basic information about the dwelling. Check these details match the stamped drawing documentation.

Property Nathers Certificate

 

6.    ‘Construction and environment’ provides information on the size of the dwelling assessed, the climate zone and the exposure category best describing the terrain surrounding the dwelling. Ensure these match the dwelling. For information on exposure categories, see the assessor handbook. 

Construction and environment Nathers Certificate

7.    The ‘Accredited assessor’ section indicates that the Assessor is a member of an Assessor Accrediting Organisation (AAO). An AAO provides quality assurance, on-going training and confirms professional indemnity insurance is held by the assessor. 

Non-accredited assessors do not necessarily have these industry safeguards. You will need to be comfortable the assessment was conducted by a sufficiently experienced person and meets the requirements of the state or territory. Note: states and territories have different requirements for accrediting assessors, so you will need to check what is appropriate within your jurisdiction.

Accredited Assessor Nathers Certificate

8.    The ‘Thermal performance’ figures indicate how much heating or cooling is expected to be required each year to keep a home within a comfortable range.

Check the NatHERS heating and cooling load limits to see what heating and cooling load regulations apply in each jurisdiction. States and territories have different requirements so you will need to check what is appropriate within your jurisdiction.

Thermal Performance Nathers Certificate

9.    Scan the QR code with your smart device to check the online certificate aligns with the one submitted. Each Certificate is stored on databases run by the software provider.

Verification Nathers Certificate

10.    The second page of the Certificate provides guidance on how to conduct a spot check of some important items impacting the dwelling’s rating.

Second Page Section of Nathers Certificate

Information for builders, certifiers, regulators and home owners

A Guide to the NatHERS Certificate

Non-Accredited Certificate Guide

New NatHERS Certificate samples

Preview of new NatHERS Certificate - NatHERS Accredited Assessor [PDF 809 KB]

NatHERS Accredited Certificate Sample - Class 1a

NatHERS Accredited Certificate Mini Stamp Sample - Class 1a

NatHERS Accredited Certificate Sample - Class 2

NatHERS Accredited Certificate Mini Stamp Sample - Class 2

NatHERS Non-accredited Certificate Sample - Class 1a

NatHERS Non-accredited Certificate Mini Stamp Sample - Class 1a

NatHERS Non-accredited Certificate Sample Class - Class 2

NatHERS Non-accredited Certificate Mini Stamp Sample Class - Class 2

Old Universal Certificate information

Is your rating accredited?*

A building certifier and surveyor's guide to the NatHERS certificate*

How does your home rate?*

Sample Universal Certificate - NatHERS Accredited Assessor [PDF 933 KB]

Sample Universal Certificate - assessor [PDF 486 KB]

Sample Universal Certificate Class 2 Summary - NatHERS Accredited Assessor [PDF 569 KB]

Sample Universal Certificate Class 2 Summary - assessor [PDF 311 KB]

* These fact sheets are based on the old ‘Universal Certificate’ format.