The calculation instrument automatically takes the CED and KEV factors for the energy sources gas, fuel, coal and wood.

Example C: Falk Comprehensive School
The example school building is situated in Germany. In 2003 an amount of 200.000 kWh of natural gas was consumed for space heating. For the weather correction factor a value of 1,1 was calculated since the winter had been unusually warm. Therefore, the climate corrected energy consumption for space heating purposes came to 220.000 kWh. This is the overall weather corrected gas consumption of the building. In order to obtain the primary energy consumption this value was multiplied with the specific CED factor for natural gas amounting to 1,17 which results in 257.400 kWh.

If the building disposes of a solar thermal collector, its production of hot water will be converted into primary energy. In order to ensure the simplicity of the calculation instrument it is assumed that a flat-plate collector is used.

If there is a cogeneration unit in the building the calculation instrument in its current version assumes that either natural gas, fuel oil (diesel) or biogas is used.
Furthermore, having subtracted the amount of gas that the cogeneration unit consumed for producing electricity [1], the remaining amount of gas is taken into account for weather correction although it still includes a certain amount of gas that is used for providing hot water. If the gas used for the supply with hot water does not make up a substantial part of the overall gas consumption the variations can be neglected. However, in case of a significant demand for hot water, e.g. in school buildings containing a swimming pool or a gymnasium, this procedure is not appropriate and falsifies the classification of the building. This deficiency will be removed in the future.
Concerning district heating, the calculation instrument uses standard factors which are appropriate to the district heating network that you have specified the distribution of the energy sources. If you have entered individual factors the Display® team will check if these factors meet the requirements.