An external and internal installation. An external Bio-heater provides energy that is sourced from bacteria and fungi who decompose the organic matter and release, in this process, the heat. A pipe circuit circulates water from the outdoors to the inside space - there, hanging structures are host for the Oyster mushrooms and hanging terracotta vases are a home for fungi that are present in the local air. The yellow walls are naturally hand painted with turmeric and linseed gel.