A coating of dark paint reaching from the floor to the very tip of the roof decorates the exterior of this traditional wooden home in the upper Bergisches Land region. But this unusual external decor is not the only thing that sets this family home apart: It is also kitted out with intelligent building technology. Behind the sleek façade, a system of components works together to achieve KfW Efficiency House 55 standards. There are various standards for KfW Energy Houses, as indicated by the number in their name. The number 55 corresponds to the building's energy consumption in per cent compared to a similar new-build construction. The lower the number, the lower the energy consumption of the property and the higher the subsidy awarded by the KfW bank. Owner Alexandra Schmitz made a deliberate decision to opt for a wooden home with a black façade. The construction is supported by 24-centimetre-thick posts, the structure of which remains visible through the dark paint. The wooden house is designed to blend in with the typical architecture of the region, with its dark slate houses with white window frames.