Sets out a method of evaluating the annual energy performance of water heaters using a combination of test results for component performance and a mathematical model to determine the standardized annual purchased energy use. The procedure is applicable to electric, gas and solar water heaters with integral boosting or preheating into a conventional storage or instantaneous water heater and to heat pump water heaters. For solar and heat pump water heaters, displaced purchased energy relative to reference water heaters is also calculated.
AS/NZS 4234:2008 Referenced Document
AS 1056.1 General requirements for storage water heaters
AS 2984 Solar water heaters - Method of test for thermal performance - Outdoor test method
AS 3498 Safety and public health requirements for plumbing products — Water heaters and hot-water storage tanks*， 2020-03-06 Update
AS 4552 Gas fired water heaters for hot water supply and/or central heating
AS/NZS 2535.1 Test methods for solar collectors Part 1: Thermal performance of glazed liquid heating collectors including pressure drop
AS/NZS 2712 Solar and heat pump water heaters - Design and construction
AS/NZS 4692.1 Electric water heaters Part 1: Energy consumption, performance and general requirements (Incorporating Amendment No.1: 04/2011; Amendment No.2: 10/2015)*， 2015-10-06 Update
ISO 9806 Solar energy - Solar thermal collectors - Test methods*， 2017-08-31 Update
ISO 9806-3 Test methods for solar collectors - Part 3: Thermal performance of unglazed liquid heating collectors (sensible heat transfer only) including pressure drop
NZS 4602 LOW PRESSURE COPPER THERMAL STORAGE ELECTRIC WATER HEATERS (Includes Amendment 1: 03/1990)
NZS 4606.1 Storage Water Heaters Part 1: General Requirements (Includes Amendment 1: 1991, Amendment 2: 1991, and Amendment 3: 1993)
AS/NZS 4234:2008 history
2021AS/NZS 4234:2021 Heated water systems — Calculation of energy consumption
1970AS/NZS 4234 Sup 1:2021 Heated water systems - Calculation of energy consumption-Parameters and outcomes for software simulations (Supplement to AS/NZS 4234:2021)
2008AS/NZS 4234:2008 Heated water systems - Calculation of energy consumption