Heliotrop, Energy-plus house in Freiburg, Germany.
The cylindrical Heliotrop building rotates 180 degrees during the day, following the sun's path to maximize solar energy collection through its glass facade.
Completed in 1994, this residential structure stands as the first energy-plus house worldwide, designed by architect Rolf Disch as his private residence.
The Heliotrop demonstrates German engineering excellence in sustainable architecture, introducing new standards for energy-efficient residential construction.
Tours of the exterior require advance reservations, and visitors can reach the site at Ziegelweg 28 using public transportation from Freiburg central station.
The structure generates four to six times more energy than it consumes through its dual-axis solar panels and specialized thermal insulation systems.
Location: Freiburg im Breisgau
Inception: 1994
Architects: Rolf Disch
Official opening: 1994
GPS coordinates: 47.97330,7.83322
Latest update: March 6, 2025 01:56
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