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Industry alert: Use of older NatHERS software versions

This industry alert is to clarify arrangements for use of Nationwide House Energy Rating Scheme (NatHERS) software during the transition period for National Construction Code (NCC) 2022 energy efficiency requirements.

In Victoria, this transition period commenced on 1 May 2023 and has been extended until 30 April 2024.

During the transition period, compliance with performance requirement P2.6.1 in NCC 2019 using the NatHERS Deemed to Satisfy (DtS) pathway can only be demonstrated using NatHERS software that uses version 3.21 of the Chenath engine.

Compliance with performance requirement H6P1 in NCC 2022 using the NatHERS DtS pathway can only be demonstrated using NatHERS software that uses version 3.22 or 3.23 of the Chenath engine.

Once the transition period for NCC 2022 energy efficiency requirements has concluded on 1 May 2024, use of NatHERS software that uses Chenath 3.21 will only be permitted if there has been a written request from the relevant building surveyor in accordance with the NatHERS Software Accreditation Protocol.

Please visit the NatHERS Administrator website for further information.