Leitz-Park, Wetzlar

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Reference description

  • Surfaces:
    - GFA: 35.580 m²
    - BRI: 155.000 m²  
  • Energy indicators:
    - Energy standard: low energy house
    - Annual primary energy requirement: 40 kWh / m² a
    - Final energy requirement: 13,5 kWh / m² a
  • Energy standard: 54% over-fulfillment of the EnEV 2009
  • Useful energy: Gas, electricity, geothermal energy
  • Certificates:
    - European Union Greenbuilding Certificate
  • Investment: 60 million euros

Leitz-Park - 3rd BA building H

Wilhelm Theis GmbH implemented the heating and cooling supply for buildings H and W in Leitz Park. Specific producers and their services can be found in further explanations.

The special feature of the 3rd BA building H is the simultaneous generation of heat and electricity, which ensures the base load of the building. In addition, the hotel is supplied remotely with heating water and hot water.

  • Heat supply 
    - CHP 39kWth / 20 kWel
    - Condensing boiler 568 kW
    - Buffer storage 3.000 l
    - Heating distributor with 5 heating circuits
    - District heating supply of hotel with heating water and kitchen with drinking water
  • Cold supply:
    - Chiller 223 kW
    - Buffer storage 3.000 l
    - Supply of 2 cooling circuits

Leitz-Park - 3rd BA building W

In the 3rd building W, the special feature of the bivalent heating and cooling supply by two heat pumps is shown. Here, the environmental energy can be used in terms of control technology to cool and heat both with free cooling without the use of heat pumps and without free cooling using bivalent heat pumps . In heating mode, the heat pumps can again be operated as a base load with and without boiler support.

  • Heat supply 
    - Condensing boiler 100 kW
    - 2x bivalent heat pump with 147 kW heating output
    - Heating water buffer cylinder 3.000 l
    - Heating distributor with 6 heating circuits
  • Cold supply:
    - 2x bivalent heat pumps with 146 kW cooling capacity
    - 2x dry coolers with 172 kW each
    - Cold water buffer storage 3.000 l
    - Refrigeration distributor with 4 refrigeration circuits

Construction board

Client:
Leitz Park GmbH, Wetzlar

Location
Am Leitz Park 5, 35578 Wetzlar

Users
Leica Camera AG, Wetzlar

Architect:
Gruber + Kleine-Kraneburg Architects
buero@gruber-kleinekraneburg.de
www.gruber-kleinekraneburg.de

General planner
Gruber + Kleine-Kraneburg Architects

General contractor
ARGE new building Leica Camera Wetzlar

International competition
2007

construction time
2012 - 2014

Completion
03/2014