With an average running time of 7,500 hours with 3,000,000 kilowatt hours, the power unit produces approximately the annual electricity requirements of Wilkhahn, and, at the same time, the resulting waste heat is directly used as heating energy. The power unit thus has an efficiency level of 82%. However, the best part is that vegetable oil is used as fuel instead of oil or gas: during the combustion process not more CO2 is released than was previously absorbed by the plants. According to the internationally recognized calculation method used by the Öko-Institut Freiburg, Wilkhahn thus reduces its CO2 emissions at its main production site in Bad Münder, Germany, by at least 78%; in relation to all international production sites this still amounts to 69%. The CO2 emissions accruing to the production of vegetable oil have already been taken into consideration in this calculation.