The restaurant on the Berneuse offers catering possibilities for up to 500 guests on five storeys. Natural gas is used for the energy supply of the complex for heating as well as cooking purposes. For this a central boiler plant with a 420 kW cast iron boiler is located on the topmost storey. The boiler is fired with a gas blower burner. The total power of the cookers, ovens, steamers and microwave ovens installed in the kitchen amounts to approx. 100 kW. As the kilowatt hour rate of natural gas is lower than that of electric power the use of gas appliances result in considerable cost savings in addition to higher flexibility and efficiency, shorter readiness periods and heating-up times. (BWI).