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AS/NZS 4234 transition period extended

The transition period for AS/NZS 4234: 2021 Heated Water Systems - Calculation of energy consumption has been extended.

The extension period for AS/NZS 4234 will now align with the transition period for new energy efficiency requirements proposed for the 2022 edition of the National Construction Code (NCC).

Previously, in 2021, VBA advised transition arrangements for AS/NZS 4234 so that it can continue to be used until 31 August 2022.

How long will the transition period be extended for?

As the new NCC 2022 energy efficiency requirements and transition period are yet to be finalised, we are unable to indicate an exact date for when the extension will end. As indicated above, this date will be the same as what will be applied for the NCC 2022 energy efficiency changes. The VBA will continue to keep practitioners updated throughout this process.

Which standard should I continue to use for now?

During the transition period, plumbing practitioners complying with energy efficiency requirements in NCC 2019 and associated standards in Plumbing Regulations 2018 should continue to use AS/NZS 4234: 2008. This affects the installation of solar water heaters installed to meet the 6 Star building standard.

We will be able to update plumbing practitioners on what the NCC 2022 requirements are once they have been finalised.

Why is the AS/NZS 4234 transition period being extended?

Extension of the AS/NZS 4234 transition period reflects the anticipated phase out of related requirements in the NCC:

  • Solar water heater requirements in Schedule 2 of the Plumbing Regulations 2018 are designed to support compliance with Victoria’s existing variation to residential energy efficiency requirements in NCC 2019, which requires either a solar water heater or a rainwater tank connected to all toilets be installed in all new Class 1 homes.
  • This existing variation will be removed from NCC 2022 to support the introduction of the proposed ‘whole of home’ energy usage requirement. This new approach will deliver better outcomes for energy use and greenhouse gas emissions, as well as providing greater flexibility and choice in the selection of fixed appliances.

Where can I find out more information?

The VBA is reviewing energy efficiency practice notes to reflect NCC 2022 and transitional arrangements - updates will be released in coming months.

If you have questions or require further information regarding the updated standards, please contact the VBA on 1300 815 127 or email.