Residential and commercial building (passive house) in Julbach

Certified passive house - heated & cooled by air-conditioned ceiling in combination with air-to-water heat pump, approx. 24kWp PV system with 10kW battery storage.

Solid ecological construction using mainly locally manufactured products.  

Extensive avoidance of petroleum-based building materials & construction chemicals, e.g. facade cladding made of natural larch, clay plaster, lime paints, natural anhydrite screed, interior fittings largely without paints, wooden suspended ceilings made of converted spruce multi-layer boards.


Kerstin Graml

Project Field

HOAI 1-9 - Energieebratung -Passivhaus - KfW




457m² living space and usable space

HWB kWh/m²a


Passivhaus mit Büro im Erdgeschoss und Wohnfläche im Obergeschoss
Stefan Graml

Certified passive house, which was built in massive, ecological and completely thermal bridge-free construction. The gable roof and the rear-ventilated facade cladding made of natural native larch lathing are intended to create a link between modern architectural style and traditional Bavarian construction! 
The architecture of the building was adapted to the energy-optimized operation. The shape of the building including the arrangement of the openings and windows was planned taking into account the seasonal solar radiation (summer max. shaded or with intentional solar radiation in winter). Even the planting was adjusted to the maximum shading in summer or the optimal solar gain in winter. The roof area with PV modules is planned with 30° in south orientation and without self-shading to ensure a max. electricity yield.
Heating and air conditioning are provided by the climate control ceiling in the form of Dennert-Holhkammer prefabricated ceilings with integrated heating pipes. Thanks to the high insulation standards and by means of an air-to-water heat pump from Kermi, the entire building can be heated with only 8kW of heating power and also passively cooled. In addition, a central ventilation system - also from the Kermi company - with around 90% heat recovery ensures an optimal supply of fresh air and a controlled air exchange in the building for each utilization unit (office & apartment).

A photovoltaic system of almost 24kWp with 10kW battery storage was installed to supply the building with its own electricity. Due to the bus-controlled connection of the building technology with the PV system and the battery storage, the running times of the heat pump are automatically adapted to the power generation and thus the solar power is optimally utilized.
The entire building was constructed according to a sustainable approach. The insulation of the building consists as far as possible entirely of oil-free products (glass foam ballast as insulation under the floor slab, soft wood fiber in the floor structure and roof, mineral fiber insulation in the facade...). As interior plaster, natural clay plaster was used, which was painted with lime paint without chemical additives. Natural wallpaper from the company Organoids was installed, as well as acoustic panels made of peat from the company Silent Fiber to improve acoustics. In the office, upgraded 3-layer spruce panels were installed as suspended ceilings instead of plasterboard acoustic ceilings. 90% of all floors are laid with low-emission and durable ceramic tiles on natural anhydrite screed without chemical additives. Wooden floors made of native ash were not glued down.  
The building materials were - as far as possible - produced or mixed close to home (bricks, concrete, timber, wooden facade, roof tiles, plant technology, clay plaster, paint ...) in order to avoid long transport routes during construction - for additional protection of the environment.

The garden is irrigated via its own cistern. In favor of biodiversity, a strip of semi-natural meadow was left, which is only used extensively, to balance out the gravel areas.


Hinterlüftete Fassadenbekleidung aus naturbelassene Lärchenlattung.
Stefan Graml