Benchmark tool

The benchmark tool (AccuRate) is supporting the expansion of NatHERS to include Whole of Home assessments and ratings.

The NatHERS Administrator uses the benchmark tool to measure the accuracy of software tools seeking NatHERS accreditation. This ensures outputs are consistent across all accredited tools.

CSIRO released the consultation version of the benchmark tool in March 2021. Since then, a range of updates and improvements have been made. These updates have been undertaken in partnership with industry and government experts. This includes enhancements identified through the National Construction Code (NCC) 2022 consultation process. Interested tool developers can access the calculations method used to develop the benchmark tool here.

The benchmark tool provides an assessment and rating of a home’s appliances and has been designed to align with the NCC 2022 energy efficiency performance requirements.

  • It includes the key regulatory appliance modules included in NCC 2022 (heating and cooling appliances, hot water systems, swimming pool and spa pumps, lighting, onsite solar photovoltaic (PV) and battery systems) as well as allowances for non-regulated loads (such as plug-in appliances and cooking loads). This allows NatHERS tools to be used for NCC 2022 as well as provide valuable information to users about energy use across the whole home.
  • Within each appliance module, the tool provides a larger range of appliance types than offered under the NCC 2022 elemental pathway.
  • It calculates the annual energy use of a home (by fuel type), solar PV generation and battery storage, electricity imports and exports.
  • It provides a breakdown of energy use by module so that users can see what is having the largest impact on energy use.
  • It provides a Whole of Home rating based on the energy value of the home (the metric used for NCC 2022).

A commercial version of AccuRate is available from Energy Inspection.

Watch the Whole of Home benchmark tool demonstration video


Currently endorse NatHERS Whole of Home tools

The NatHERS Administrator has endorsed Sustainability Victoria’s FirstRate5 Whole of Home Pilot Tool. For more information, visit Sustainability Victoria.

The expression of interest process for endorsement has closed. Software developers must now follow the NatHERS 2022 Software Accreditation Protocol process to be considered for accreditation under NatHERS.

NatHERS endorsed vs NatHERS accredited software

Endorsed tools demonstrate what is possible for accredited NatHERS tools, by providing an indication of the look, feel and usability. Unlike NatHERS accredited tools, endorsed tools will not be able to produce a NatHERS Certificate, or rating.

The process for formal accreditation is outlined in the NatHERS 2022 Software Accreditation Protocol.

Learn more