Green Certify provides NatHERS Certificates for residential buildings across NSW and QLD. We prepare reports for any size or type of home offer free quotes within one business day deliver results quickly and guarantee satisfaction.

About NatHERS Certificate

The Nationwide House Energy Rating Scheme (NatHERS) is a 10-star system that measures a home’s energy efficiency based on its Architectural design. Using accredited software it simulates how heat moves in and out of the house throughout the year, factoring in climate and occupant behaviour. Higher star ratings mean less heating or cooling is needed, helping residents save on energy bills while keeping homes comfortable—often with little or no extra construction cost.

Why NatHERS Matters

Imagine stepping into a home that feels cozy in winter and pleasantly cool in summer—without ever turning on a heater or air-conditioner. The secret isn’t magic; its smart design. Everything from the materials and layout to the placement of windows and shading plays a role in comfort, energy efficiency and running costs. In Australia, all new homes and major renovations must meet minimum energy efficiency standards set by the National Construction Code (NCC). The NatHERS star rating, from one to ten, shows how well a home performs—higher stars mean lower energy bills and a more comfortable living environment.

NatHERS Modelling Software

A zero-star home offers minimal thermal comfort, 7 stars indicate good performance and a 10-star home may need little or no mechanical heating or cooling. To accurately assess and achieve these ratings, NatHERS uses CSIRO-backed software to model a home’s heating and cooling performance. The software models each dwelling zone by zone, taking into account walls, roof, floor, windows, orientation, shading and local climate.

This detailed approach allows analysis of heating loads for every part of the home, with outputs presented in charts showing both per-zone and total annual heating consumption in MJ. By providing this level of detail, designers can optimise building elements precisely—avoiding unnecessary oversizing of windows or other components—and target improvements and corrections exactly where a zone underperforms.