Answer a few questions about your home to get an indicative NatHERS energy star rating.
Step 1 of 5
Climate Zone
Your location determines the climate zone used in NatHERS modelling. Select the state or territory where your project is located.
Building Type
The type and size of your project affects thermal performance expectations.
Construction and Insulation
Wall construction and insulation levels have a significant impact on your energy rating.
Glazing and Orientation
Window performance and solar orientation are two of the biggest factors in a NatHERS assessment.
Ventilation and Shading
Passive design features like cross ventilation and external shading can make a meaningful difference.
Your Estimated NatHERS Rating
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Estimated Stars (out of 10)
This is a simplified estimate based on common design assumptions. Actual NatHERS star ratings depend on detailed thermal modelling using accredited software such as FirstRate5 or BERS Pro. Results may vary depending on floor plan, window-to-wall ratios, slab detailing, and many other factors not captured here.
Want an accurate assessment?
Our accredited NatHERS assessors can model your project using FirstRate5 or BERS Pro and identify specific improvements to lift your rating.