nZEB student dormitory in Varazdin
nZEB Example

Building structure is a seismic resistant reinforced concrete frame. It has seven (7) stories – underground garage, ground floor and five floors to accommodate students. Modern materials were used to shape the facade; reinforced concrete and a glass on the ground floor as a link with the previously built student restaurant, and on the upper floors – ventilated facade of fibre cement boards and aluminium hardware with wooden wings having triple glazing and low-e coating. Building has a centralised heating/cooling system with highly efficient heat pumps (water-water) as a source of heat. Building is also using passive cooling system (“natural cooling”) by using cold groundwater from the suction well with a temperature regime of 12/17 ° C in the primary circuit and by exchanging heat via a heat exchanger. The building is using stormwater for flushing toilets. There is a 120 kW solar power plant on the roof of the building which covers the electricity needs of the entire building. BEMS is used for building’s systems optimization and for smart monitoring of energy consumption.

Building owner

Zagreb University

Building type
Project type
Year of construction / major renovation

Construction: 2017
Major renovation: N/A

Total floor area
15923.63 m²
Construction U-value
nZEB Parameters

Primary energy consumption: 7 kWh/(m2a)
Energy needed for heating: 13 kWh/(m2a)
Building tightness: 0,30 W/(m2K) or 3.421,88 W/K
CO2 emissions: 1 kg/(m2a)
Renewable share of energy: more than 90 %

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