Architectural Festival “GORODA" (“Towns” or “Cities” in English), devoted to architectural installations and land-art, set this time for its participants a completely new challenge - to design and build a complete dwelling house. The task was not easy - among the basic principles of the project were efficiency and economy, and fast construction - in 24 hours. The project of Ivan Ovchinnikov - The black cube - won. Dimensions of the building - 6x6x6 meters - depended on the standard size of many of the materials (timber) to make no any waste. As the result - scrap from all over the construction was barely enough for it to cook the skewers Simple form of a cube with the minimum number of junctions is dictated by energy efficiency. Prefabrication of all the details at a furniture factory “Pioneer” took two weeks. Assemble the house tooks 24 hours, as it was planned. In the cold of minus 15-20 degrees a team of 15 people heroically built the house on place - screw up the details by their hands, assemble all the internal elements and fastened the facade panel and roofs. Starting installation on February 12, the next day in the evening the participants of the project were settled in the ready house, and in the morning on February 14 had already woken up in the space warmed up by the sun. For next two weeks architects held a several roundtable discussion on pre-fabricated housing and renewable energy, presentations and film screenings. The participants of the project all this time lived in the building, checking its operational quality, and in considering possible options for improving the design. The interior space of the Archshelter configured to the principle of residential cells with a large public area like a club for up to 40 people. The first floor is completely given to the public zone with the possibility of the dining room, kitchen and toilet. The upper tiers are for a working and a sleeping zone. There are a huge loft in half-floor size level under the roof and a compartment for 18 persons below. The building's design provides any transformation from house for a big family to a studio for one - two persons. Materials were used the most simple and cheap - pine logs and boards inside, and panel made ​​of hardboard, insulation ISOVER and plywood. For all materials, together with fasteners, spent less than 5000 euro (170000 rubles) for the building with capacity up to 40 people! Two transparent façade made ​​of polycarbonate panels of Carboglass company. Thanks to its multi-layer, all the interior space is heated during the day by sunlight and retain heat well into the night - so it was good experiment with energy efficiency. Arhshelter began a pilot project of the series of experimental buildings, whose construction is planned for the Architectural farm in Tula region (Russia, 100km from Moscow) in the summer of 2011.