Costs based on NFA
© BINE-Informationsdienst

Selected 2005 measurement data (m² based on heated NFA)
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Energy balance

In 2005, the final energy consumption for heating, ventilation, cooling and lighting, including building cooling and the cafeteria (without refrigeration devices) was very low at 47.2 kWh/m² p.a., and well beneath the support initiative's required level. However, the heating consumption of 34.6 kWh/m² p.a. is still above the calculated requirement of 12 kWh/m² p.a. This is primarily due to the fact that only about half of the building was occupied, i.e. half of the internal heat gain is missing. Room temperature which is almost 3 K higher than planned for also plays a role. Simultaneously, solar yields are missing due to the fact that the unused rooms are permanently shaded – a rule which does not correspond to the planning.

Meanwhile, the cafeteria, which is also used to a great extent by persons from outside, has a heightened ventilation requirement, due to its full capacity utilisation. In 2005, the primary energy requirement was 81 kWh/m² p.a. If the energy fed from the PV system on the building's roof is taken into account, this is reduced by another 5 kWh/m² p.a. Both the contractor and the occupants are highly satisfied with the building and the workplace comfort. Even during the inaugural phase, when the ventilation was not yet fully functional, and the heating was controlled manually, the tenants experienced hardly any utilisation restrictions


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Construction physics, BTE & simulation
ebök Planung und Entwicklung Gesellschaft mbH

Construction management