Articles - Certified Energy

Introducing NatHERS For Existing Homes: Enhancing Energy Performance In Australia's Older Housing Stock

Written by Jamie Bonnefin | Jul 1, 2025 2:30:53 AM

Discover how NatHERS for Existing Homes is revolutionising energy efficiency in Australia's older houses.

Understanding NatHERS For Existing Homes

NatHERS for Existing Homes is an extension of the Nationwide House Energy Rating Scheme (NatHERS), designed specifically to evaluate and enhance the energy efficiency of Australia's older housing stock. Developed to meet the growing need for sustainable living, this initiative provides a standardised method for assessing the thermal performance of existing residences. By adapting the principles of NatHERS used for new homes, this scheme aims to bring older homes up to contemporary energy performance standards.

The Need For NatHERS In Older Housing Stock

Australia's residential sector is a significant contributor to the nation’s energy consumption and greenhouse gas emissions. Many older homes were built without the energy-efficient technologies and materials that are standard in new constructions today. As these homes age, their energy performance often declines, leading to increased energy costs and carbon footprints. The introduction of NatHERS for Existing Homes addresses this issue by providing a framework to evaluate and improve the energy efficiency of these older properties, thus contributing to national sustainability goals.

Key Differences Between NatHERS For Existing Homes And New Homes

While the core principles of NatHERS remain the same, the application to existing homes differs in several key aspects. New homes are typically designed with energy efficiency in mind from the outset, utilising modern materials and construction techniques. In contrast, existing homes require tailored assessments to account for their unique characteristics and potential limitations. NatHERS for Existing Homes incorporates factors such as historical building practices, existing materials, and possible retrofitting solutions to provide a comprehensive and realistic energy performance rating.

The Impact Of NatHERS On Australia's Energy Efficiency Goals

The implementation of NatHERS for Existing Homes is a critical step towards achieving Australia’s energy efficiency and carbon reduction targets. By systematically improving the thermal performance of older homes, the scheme helps reduce energy consumption and greenhouse gas emissions on a national scale. This not only supports environmental sustainability but also enhances the living conditions and financial savings of homeowners through reduced energy bills.

Future Prospects: Transforming Australia's Housing Landscape

Looking ahead, NatHERS for Existing Homes has the potential to transform Australia’s housing landscape. As more homeowners and industry professionals embrace the scheme, the cumulative effect will be a significant reduction in the environmental impact of residential buildings. Moreover, the increased demand for energy-efficient retrofits and upgrades will drive innovation and growth within the construction and engineering sectors. Ultimately, NatHERS for Existing Homes represents a pivotal move towards a more sustainable and energy-efficient future for Australia.