A block of flats, Berlin, Deutschland


ELCO ensures more energy and cost efficiency

The property to be renovated was a block of flats in the Berlin district of Kreuzberg. The problem was an obsolete heating system with excessive energy consumption. Renovation of the heating system was urgently required, on one hand to save energy, and on the other hand to increase convenience. The housing administration decided on energy supply contracting. The contract was awarded to GASAG WärmeService (GWS) from Berlin. The GWS chose an advanced solution from ELCO: the RENDAMAX 3406 and RENDAMAX 3408. The system was put into operation at the end of the yea. Thanks to the renovation measures combined with a high-performance block-type thermal power station, it was possible to significantly improve the energy balance of the block of flats. This resulted in savings of 19 %.


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  • Reduction of operating costs
  • Quick amortisation through energy savings and reduced operating costs
  • Efficiency 96 %


  • Leading-edge technology
  • Compact construction, low space requirement
  • Extremely low emissions and quiet operation
  • Flexible adjustment of power through wide modulation range


  • Secure financing of the new heating solution through energy-supply contracting
  • Reliable operation over many years