A sample of briquettes was submitted to HRL Technology for analysis by Purple1 Pty Ltd.
Results from this analysis are presented below.

The historical HRL analysis found 5.3% moisture, 16.5 MJ/kg of net energy, 1.8% ash and 0.03% sulphur in the sample tested. In practical terms, this indicates a dry, consistent fuel that can provide about 10–18% more usable heat per kilogram than typical seasoned firewood at 15–20% moisture, which often produces around 14–15 MJ/kg. Coal varies considerably, and higher-grade black coal can provide more heat per kilogram, but it is a fossil fuel and commonly produces more ash, sulphur pollution and carbon emissions. These briquettes therefore offer a convenient wood-based alternative to ordinary firewood, with consistent moisture, compact storage and relatively little ash. These figures apply only to the earlier sample analysed by HRL Technology and do not certify every current pack.