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Category Archives: Energy Assessment Tools

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Class 2 Units: Building Average Calculation

Dr Anderson recently conducted some training Workshops for an AIBS Energy Efficiency Conference about calculating a Class 2 (Apartment units) Building Average. Since the workshop was well received with good positive feedback, we’ve decided to put the content on our […]

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What’s so great about our JV3 assessments?

A “Verification Method” JV3 assessment compares the proposed building’s Annual Energy Consumption, against a simulated Reference Building. This Reference Building complies with all the elemental NCC Section J Deemed-To-Satisfy (DTS) requirements (e.g. insulation and glazing). According to JV3 modelling conditions, […]

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QR Codes on Universal Certificates

You might have noticed that your Universal Certificate has a small QR Code, but what do these QR Codes do?
First off, if you’re not sure what a Universal Certificate is, we’ve written a great summary article explaining why a […]

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What is a Universal Certificate?

If you’ve ever looked around for a qualified Energy Assessor, you’ve probably run across the term “Universal Certificate”, especially in regards to Residential assessments. So what exactly is this fancy certificate & why is it so important to have one?
The […]

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Including NatHERS Universal Certificate in Residential Assessments

Sustainability House created the NatHERS Universal Certificate. It was introduced to provide a uniform method of reporting building design elements and assessment results. For more information on the development of the Universal Certificate see here.
This article begins with who can […]

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Roof Insulation Compression Calculator

When fibre roof insulation is compressed (to fit into a tight space, squished underneath purlins or even by a retaining mesh), its R-value decreases. This change isn’t a simple linear reduction, but a complex curve that’s different for each material.
To […]

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Explanation of terms used in the Energy Efficiency Industry

There’s so many terms specific to the Energy Efficiency industry that it can be hard to keep track of them all. Here’s a glossary list of some of the ones we use, plus what they mean.


α (greek alpha)
The Solar Absorptance […]

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Optimal Window Eaves Shading

Following from Window Design for House Efficiency the contribution of windows to the total building Energy Efficiency is considered. The BERS 3.2 thermal simulation was used to determine the optimum eaves width for glazing of different heights. The optimum was […]

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Confused by all the complicated words & jargon in the Energy Efficiency Industry? We've put together a brief explanation of common Energy Efficiency terms.

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