Description

In Aotearoa New Zealand homes, water heating accounts for around one-third of total energy use on average.

This bulletin considers the different aspects of system selection, such as client needs, purchase/installation and operational costs, energy efficiency and embodied and operational greenhouse gas emissions.

Scope

The bulletin covers:

• Introduction and Water rating label.
• Energy options
  • Electric resistance water heaters
  • Heat pump
  • Dedicated solar photovoltaic
  • Solar thermal
  • Wetback
  • Fossil gas
• Water storage location and size
  • Location
  • Storage cylinder size
• Smart appliances, smart homes and a smart grid
• Building Code and Standards requirements
  • Acceptable solutions and Verification methods
  • Energy efficiency requirements
  • Health and safety requirements
• Retrofitting water heating systems
• More information (resouces)