Brief portrait
The passive house office and administration building of Ruhlamat Automatisierungstechnik GmbH in Marksuhl was completed in September 2008. The majority of the heat requirement is covered by “passive” sources, such as solar radiation, waste heat from people and technical equipment. The building is equipped with a supply and exhaust air system with heat recovery. The supply air is preconditioned via a geothermal heat exchanger. A brine/water heat pump is used to heat the building (ventilation and transmission heat losses). 16 geothermal probes with a depth of 45 m were installed in the ground. The storey ceilings were designed as “active ceilings” (concrete core activation) and are used as heating and cooling surfaces. Rainwater is collected in a 14 m³ cistern and used for flushing toilets and urinals. The lighting in the individual offices is daylight-dependent, using wall lights and floor lamps with light sensors and presence detectors. Skylight window strips are provided in the shed roof area. The south-facing side is completely covered with photovoltaic modules consisting of blue polycrystalline photovoltaic cells. The structure of the skylight windows is as follows: 5 mm partially laminated glass (TVG), 2 mm resin and cells, 5 mm partially laminated glass - 12 mm space between the panes - 16 mm laminated safety glass. The entire system, consisting of 40 modules, has a total output of approx. 7.2 kWp. The electricity generated is fed into the public grid.
