TWO RATINGS. ONE CLEAR PICTURE OF YOUR HOME.
What Is a Home Energy Rating Certificate?
A Home Energy Rating certificate is issued by an accredited assessor under the Nationwide House Energy Rating Scheme (NatHERS), which is recognised by all Australian governments. It gives your home two ratings that can be compared fairly with other homes across Australia.
Thermal Star Rating (0–10)
How well does your home stay comfortable?
The modelled heating and cooling demand needed to keep the home comfortable. Construction, insulation, windows, airtightness, orientation, shading and location all influence the result. Typical pre-2005 homes rate around 1.5–2.5 stars; new houses are built to 7 stars.
Home Energy Rating (0–100+)
How efficiently does your home use energy?
The modelled energy use for heating, cooling, hot water, lighting and cooking appliances, together with any solar and battery systems. A score of 100 means net-zero annual energy use, and scores above 100 are possible. New houses are built to 60.
Modelled Under Standardised Conditions
Every home is assessed with the same NatHERS assumptions for room use, heating and cooling settings, occupancy and local climate, so results are fair and comparable across Australia. Actual bills and comfort depend on how you use your home. A fair comparison, not an electricity bill prediction.
Your Certificate Also Shows
Estimated annual energy use and greenhouse gas emissions
Appliance performance and predicted energy use
How comfortable the home is without heating or cooling
The home’s solar and battery profile, if relevant
Upgrade guidance for our climate zone
New house benchmarks: NCC 2022 (7 stars; Home Energy Rating 60). NSW new homes are assessed under BASIX.