Electric hot water cylinders – scope and exclusions

Exclusions

The following products are excluded from MEPS:

• Water heaters that use electric resistive heating to provide less than 50% of the energy supplied in a typical year (eg heat pump and solar water heaters). These must be tested to AS 4234, under Climate Zone 3, with an energy delivery of 22.5 MJ/day for an electric boosting element, and energisation profile specified by the manufacturer.
• Water heaters that are not intended for electric power grid connection (eg for use in vehicles and boats) are exempt from MEPS.

If a solar water heater or heat pump water heater supplier does not wish to provide the test results for AS 4234 then they must register the cylinder for MEPS.

This extract from AS/NZS 4474.1:1997 is reproduced with permission from Standards New Zealand. The content of this extract is solely for information and provides an overview of the requirements in force in New Zealand at the time of writing. Regulatory changes and differing interpretations of the regulations mean that the information given here cannot necessarily be relied upon. The current version of the relevant Standard must be referred to for definitive information. A full copy of the Standard is available at Standards New Zealand.