---
title: "Equipment: unknown fuel information "
url: "https://knowledge.bigmile.eu/en/article/equipment-unknown-fuel-information"
language: "en"
last_updated: "2025-05-06T14:00:32.995Z"
---

# Equipment: unknown fuel information 

NOx emissions for equipment are calculated with use of the AUB methodology (adblue, operating hours and fuel usage). In case fuel information is unknown, a default calculation can be made using TNO average fuel consumption information. These averages are based on two equipment properties: manufacturing year and maximum power in kW. When these two variables are available, a calculation using average consumption is possible. 

BigMile will automatically calculate emissions when fuel information is set to 0 or left empty in the import file. The average fuel consumption is retrieved from the TNO table and used for both calculation of NOx emissions and CO2e emissions. 

When a file is imported you can select if theoretical fuel consumption should be used yes/no in case of missing fuel information.

![](https://cdn-assets.productfruits.com/63cb6dc0-0d92-4385-9d89-7dfb7ea2ceed)