One of the goals of eco-friendly construction is to create homes that not only use fewer resources than conventional homes, but actually produce more energy than they consume. The house, located in Kladnica, Bulgaria, is energy efficient while minimizing its impact on the picturesque mountainous surroundings.
The home was built on a solid concrete foundation with concrete supporting frames and garage roof, but the rest of the structure is lightweight steel and timber. Thanks to excellent insulation and sun protection, the home needs no cooling in the summer and uses very little heat in the winter. Solar panels on the roof and a biomass heating system contribute to the energy saving and production of the home.
A controlled mechanical ventilation system with heat recovery provides the home with fresh air in all seasons. Careful measures were taken to ensure the air-tightness of the home. This feature controls energy loss and qualifies the house as passive by keeping the energy consumption below minimum requirements.