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The Nationwide House Energy Rating Scheme, or NatHERS, is being expanded to include Whole of Home assessments and ratings to support the proposed National Construction Code energy efficiency requirements for residential buildings in 2022; the changes will help households improve a home's energy efficiency and reduce energy use, which provides a range of benefits including lower energy bills, improved comfort and health for occupants, and reduced carbon emissions.

This handbook has been produced by Water Corporation to assist builders and plumbers to work with us and our regulators to deliver the best possible outcomes for our customers, by protecting public health as well as public and privately owned assets.