# Where does the term elevations come from?

Natural gas is a natural product, the energy content of which depends on several factors and, unlike electricity, is subject to fluctuations. The gas temperature and the gas pressure are further influences that must be taken into account in your gas billing using the state number.

Your gas meter does not show the kilowatt hours (kWh), but the cubic meters (m3) of gas used.

The consumed kilowatt hours (kWh) for your bill are then calculated as follows:

kWh = cubic meters of gas consumed (m3) times the calorific value times the number of states

The number of cubic meters multiplied by the calorific value of the gas and the condition number results in the kilowatt hours consumed.

consumption

As with any gaseous substance, the amount of natural gas consumed is given in units of volume. In the case of natural gas, this is usually cubic meters (m3).

Calorific value

The calorific value stands for the amount of heat or energy that is released during the combustion of the gas and the subsequent cooling of the exhaust gases (heat of condensation). For billing, the measured feed-in calorific values ​​for the billing period are used Average calorific value determined. The local network operator must publish the currently applicable calorific value for each month (on the 10th of the following month). You can therefore track your calorific value for each month.

The gas calorific value is given in Kilowatt hours per cubic meter (kWh per m3).

The calorific value depends on the exact gas composition. For example, butane and propane have a much higher calorific value than methane, which makes up the largest proportion of the volume of the natural gas mixture. The calorific value is lower if the gas mixture has a high proportion of inert gases such as carbon dioxide and nitrogen.

L-gas has a calorific value between 8.4 and approx. 11.2 kWh per m3, while the H-gas mainly supplied in Germany is around 10 to 13.1 kWh per m3 comes.

State number

The condition number describes the ratio of the gas volume in the standard condition (temperature: 0 degrees Celsius, air pressure: 1,013.25 mbar) to the operating condition (temperature at the tapping point and air pressure depending on the altitude).