The Greenhouse and Energy Minimum Standards (GEMS) Act 2012 contains a determination for gas water heaters which points to the joint Australian/New Zealand Standard AS/NZS 4552.2:2010—Gas fired water heaters for hot water supply and/or central heating—Part 2: Minimum energy performance standards for gas water heaters.

This standard specifies minimum energy performance standards (MEPS) for gas water heaters intended for use with natural gas, liquefied petroleum gas (LPG) and simulated natural gas (SNG) up to a nominal gas consumption of 50 MJ/h for storage water heaters and 250 MJ/h for instantaneous water heaters.

Gas fired water heaters sold in Australia or New Zealand, regardless of whether they are locally manufactured or imported, that fall within the scope of this Standard shall meet or exceed the MEPS as listed.

Appliances requiring registration are subject to transitional arrangements. Full details of the registration requirements can be found in the Standard.

Labels that appear on gas water heaters are not endorsed or overseen by the E3 Program. The gas labelling scheme is industry led. Please refer any questions to the Gas Appliance Manufacturers Association of Australia (GAMAA).


Compliance with MEPS Requirements

Evidence of MEPS compliance shall be provided by a report on a physical test to the relevant tests within AS 4552-2005.

The report, together with the registration data and documentation, shall demonstrate that each appliance submitted for registration meets or exceeds the MEPS.

NOTE: Regulators may test sample appliances from time to time to check that registered appliances are continuing to conform to the MEPS requirements of this Standard.

Refer to the Check Testing page for further details on Check Testing.