Calculate your climate footprint in 10 minutes top time.
Take the testThese are kgCO2e/kWh PCS.
We use HCV (Higher Calorific Value) and not LCV (Lower Calorific Value), because HCV is used as a conversion coefficient in invoices to convert the volume of gas used into kWh: it is assumed that the gas boiler recovers the latent heat of condensation.
Footprint base: Natural gas - 2022/average mix/consumption (in kWh HCV) (no more recent figures 10/2025).
To find out more about this rule in our model, run the calculation by clicking on the button below.
