C.F. Moller Architects
The CO2 concentration level is 500 ppm above outdoor CO2 concentration in most of the rooms. On the Active House radar, the result is equal to a satisfaction level of 1. The temperature level was identified as the worst-case to level 2 in the Active House radar, which means that it is in the range between 20 and 26 degrees Celsius during the year. The reason for the good results is due to decentralized ventilation systems, which were designed according to DS/EN 15251 Category II, providing a high air exchange. The lighting quality is also good based on a combination of LED lighting and access to daylight. The window coverage has an average ratio of around 32 % (windows are/floor area), which resulted in a strong daylight factor inside the rooms of 5.1%. There are also no emissions from heating and cooling systems since the school uses district heating and district cooling.
Total energy demand is 30.1 kWh/m2 based on a heating and electricity demand of 16.7 and 13.4 kWh/m2, respectively. The actual heating use is based on very good insulation of the building envelope, district heating as the heating supplier, MVHR with 82% efficiency, and mechanical cooling with an efficiency of 3.98%. Approximately 6000 m2 equal to 720 kWp Solar Lab PV modules with random inclination were installed covering all facades besides the ground floor, where the electricity production is 10.7 kWh/m2. About 50% of the Danish electricity energy from the net is supplied by renewable resources and 58% of the district heating. In total, 72% of the energy demand is supplied by renewable energy sources, which is equal to 21.7 kWh/m2. As a result, the primary energy use of the building according to BR2020 is only 15 kWh/m2 equal to a level 3 in the Active House radar, by a conservative calculation not taking the mentioned renewable energy source into account, besides the use of primary energy factors.
CIS is a good example of the Prosumer building of the future with BIPV on all facades and good architecture due to the special PV panels and architectural design. With about 39% of the total electricity use (inclusive el-apparatus) covered by the PV modules production, CIS is a good example of an almost zero energy building. The environmental quality of CIS was improved by reducing cold-water consumption by 28% via the implementation of water-saving fixtures compared to standard fixtures. The environmental impact caused by the building component production and energy used for building operation was at a good level. Moreover, 82% of the building construction materials are recyclable.