Average heat loss of electric storage water heaters sold in New Zealand
Year ended March 2002–2021, kilowatt hours per year
|Year ended March||
Kilowatt hours per year
Increase in heat loss over time is a result of an increase in the sales of products which do not meet NZ MEPS, but can be sold under the Trans-Tasman Mutal Recognition Agreement.
Heat loss: heat lost through the walls of the storage tank while water is being heated, given tank insulation.
Sales weighted: Average is weighted proportionally to the sales of units.
Annual energy consumption is based on assumed yearly usage.
The average is sales-weighted, which means it depends on the energy efficiency of units that were actually sold.
For more information
Data provided by
Energy Savings Under The E3 Programme: Electric storage water heaters 2021
How to find the data
At URL provided, select the '2021 Electric storage water heaters sales and efficiency data' Excel file.
This spreadsheet was reformatted for easier processing.
Import & extraction details
From the dataset Energy Savings Under The E3 Programme: Electric storage water heaters 2021, this data was extracted:
- Sheet: Energy savings
- Provided: 57 data points
This data forms the table Energy Efficiency - Electric storage water heaters sold by heat loss and nominal capacity 2002–2021.
Dataset originally released on:
October 01, 2021
About this dataset
Through the Equipment Energy Efficiency (E3) Programme, New Zealand and Australia develop common energy efficiency measures to regulate the energy performance of products in both countries.
Suppliers of products regulated under the E3 Programme provide Energy Efficiency and Conservation Authority with annual sales data for the period of 1 April to 31 March. This is used to help measure the shift in product efficiency over time and to calculate the energy savings to date from these improvements in energy efficiency.
Purpose of collection
The Equipment Energy Efficiency Programme is run by the Commonwealth state and territory and New Zealand governments working with industry to drive improvements in the energy efficiency of appliances and equipment to save households and businesses money on their energy bills reduce energy use and reduce emissions.
Method of collection/Data provider
The measures developed through the E3 Programme are minimum energy performance standards (MEPS) and the Energy Rating Label.