Villa Circuitus, Sweden's first round Passive House, round home in Sweden, round home with a circular solar balcony, SAJT Arkitekstudio, Simone Kreutzer, Tommy Wesslund, Kebony cladding, Kebony wood, weathered round house in Sweden

Clad in sustainable Kebony and orange panels, Villa Circuitus exudes a warm ambience that belies its smart design. Its round shape minimizes the surfaces exposed to the outside air, which, combined with high-performance custom windows that retain twice as much heat as standards windows, helps to minimize heat loss. As a result, less energy is required to keep the home warm in winter. Interior air temperatures are also kept stable with a heat exchanger that circulates air in a two-phase process – first through a ground-based water heater and then a post-heater.

Related: Amazing Passive House in freezing Wisconsin uses less energy than a hair dryer to stay warm

Villa Circuitus, Sweden's first round Passive House, round home in Sweden, round home with a circular solar balcony, SAJT Arkitekstudio, Simone Kreutzer, Tommy Wesslund, Kebony cladding, Kebony wood, weathered round house in Sweden

The 1,880 square foot home includes four bedrooms and an open plan kitchen and dining room – all with the kind of exceptional interior detailing for which the Swedes are so famous. It is bright and colorful, but clean, open and airy. The exterior Kebony cladding will weather over time, and – thanks to its unique composition – help protect the house from the elements.

Villa Circuitus, Sweden's first round Passive House, round home in Sweden, round home with a circular solar balcony, SAJT Arkitekstudio, Simone Kreutzer, Tommy Wesslund, Kebony cladding, Kebony wood, weathered round house in Sweden

“We have a passion for making sustainable homes and so we needed to ensure that every element of the house was responsibly sourced,” said Simone Kreutzer. “The solar-paneled railing, the recycled insulation and the striking Kebony cladding all help to realize our vision of a truly sustainable eco-home.”

+ SAJT Arkitekstudio