Duisburg location
1925 August Fasel registers his trade regarding the installation of central heating systems and steam boiler repair work
1950 Production of horizontal flame tube boilers for coal firing;
    Patent registration for a three-pass flame tube-fire tube boiler for various fuels;
    Portakessel: Radiant boiler for higher output;
    CONDORKESSEL: fully automatic three-pass shell boiler with fuel oil firing system;
    becoming the leader on the German market in the field of industrial steam generators
2001 Merger of STANDARDKESSEL and VKK