AS/NZS 4692.1 - tank heat loss
Testing required for energy efficiency.
Testing to AS/NZS 4692.1 is required for systems including water storage tanks up to 700L in volume. This standard specifies energy consumption, performance and general requirements for electric water heaters and is used to determine the tank heat loss value for a thermal storage tank.
For tanks with volume greater than 700L, AS/NZS 4234:2021 Appendix E provides a calculation methodology.