Add your own factor when a supplier publishes one for their product, or when your sector requires a factor Avarni does not ship.

You need admin access.

Custom factors live in your own factor set. Create one before you add factors.

Name them so you can tell later where the factors came from, for example the supplier's name and the year they published.

Enter factors in kilograms of each gas per unit entered, not tonnes. This is the mistake people make. A factor entered in tonnes produces emissions a thousand times too high.

If your source publishes a single CO2e figure rather than the three gases separately, enter it as the CO2 value and leave CH4 and N2O at zero. Record that you did, because the figure then does not respond to a change in global warming potential.

Select Upload Factors and use the spreadsheet template. The columns match the fields above.

A custom factor is used when a Method branch points at the factor set holding it.

Adding a factor does not make Avarni prefer it. You choose the set on the branch. See Build and edit a Method and How Avarni picks an emission factor.

To apply it to one row rather than everything, override the factor in the Emissions Hub. See Find and change a factor in Factor Explorer.

Your auditor will ask. For every custom factor, record the publisher, the document, the year and the page.

A supplier-specific factor with no source is the kind of thing an assurer removes.

Use one when the supplier has calculated their product's footprint and published it, and when the spend or volume with them is large enough to matter.

Do not build supplier-specific factors for everything. The effort is only repaid where the supplier is material and their factor differs meaningfully from the generic one.