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.

NatHERS thermal assessments provide a rating (out of 10) and information about the thermal performance (heating and cooling needs) of a home's construction. The thermal assessment is based on information about the homeÕs design, construction materials and the climate where it is being built.

NatHERS is expanding from a thermal performance rating to also include information about the energy performance of common household appliances, such as heating, cooling, hot water, lighting, pool/spa pumps and on-site energy generation and storage (e.g. solar panels and batteries).

The NatHERS Whole of Home benchmark tool is supporting the expansion of NatHERS to Whole of Home assessments and ratings. These and other improvements to the tool are currently under development, to be ready in time to support NCC 2022 requirements.