> For the complete documentation index, see [llms.txt](https://docs.betterbuilding.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.betterbuilding.io/user-guide/workflows/energy-efficiency/v2.6.2.2-verification-using-a-reference-building.md).
# V2.6.2.2 Verification using a reference building
### V2.6.2.2 Modelling on Speckel
Within NCC 2019 – Volume Two - Verification Method V2.6.2.2 can be used as a Performance Solution to meet the Performance Requirement P2.6.1 for a proposed design instead of using the optional energy rating or elemental approach in the DTS Provisions of Part 3.12.
While it is not mandatory to use a prescribed NCC Verification Method as an Assessment Method, it is generally recommended as it is clearer if a Performance Requirement has been met.
Our V2.6.2.2 modelling approach is unique, where the reference building model and reporting are automated. This approach saves significant time and effort, enabling design optimisation to be the focal point. A typical residential building is simulated in less than an hour, including simulations and result.
{% hint style="info" %}
Verification Method V2.6.2.2 is an alternative modelling process to NatHERS and can be adopted in some States and Territories as a viable compliance pathway. Speaking to an appropriate authority before seeking compliance via [Verification Method V2.6.2.2](https://ncc.abcb.gov.au/editions/2019-a1/ncc-2019-volume-two-amendment-1/section-2-performance-provisions/part-26-energy) is recommended.
{% endhint %}
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