Thermal Performance Modelling/Energy Efficiency Rating

To often, energy ratings are left until the end of the design process. They are seen as a tick the box item to gain approval. This often causes delays and price increases when designs, windows or insulation need to be changed because the minimum ratings have not been met. 

Engaging a NatHERS Accredited Assessor early within the design phase can provide you with the advice you need to have an impact on the performance of your design. Find the sweet spot between cost and performance.

We provide ratings for homeowners who

• want to discover what efficiency measures will deliver the best result for their current home.

• are working with other designers/architects and wish to optimise the thermal performance of their home during the design process.  

• are working with project home builders and wish to gain independent advice on how to optimise the thermal performance of their home.

Includes the modelling of your home based on provided drawings with NatHERS accredited software, FirstRate 5.

Basic rating:  $750*

Basic rating plus optimisation and/or modelling of alternatives: $990*

*Prices are indicative only, please contact us for a detailed quote for your project by sending an electronic copy of your house plans to hello@unmarkedearth.com.au

The Nationwide House Energy Rating Scheme (NatHERS) is a star rating system out of ten.

Currently all new homes must achieve a Minimum of 6 (Hopefully soon to be 7) out of a possible 10 stars.

By providing an estimate of a home’s potential heating and cooling energy use, NatHERS can help to make your home more comfortable and can also help to save on energy bills through smarter design choices. Often good design can reduce the amount of energy needed to keep a home comfortable with no or little additional construction cost.

If you engage a NatHERS Accredited Assessor during the design phase of your build, they can provide you with advice to improve the energy efficiency of your home with little or no additional construction cost, saving you considerable money year on year and ensuring you have a more healthy and sustainable home design.

Homes with a higher star rating are considered more thermally comfortable and cheaper to run than homes with a lower star rating.

• A 0-star rating means the building shell does practically nothing to reduce the discomfort of hot or cold weather.
• A 6-star rating is the minimum standard in most states and territories. It indicates good, but not outstanding, thermal performance.
• A 10-star rated home may not need any artificial cooling or heating to keep you comfortable.

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.