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Architect: Tom Ebdon, Lee Halligan, Peter Grove

Cost: $1,750 (£998)

Thermalwing is the winner of an international design competition organised by Ecoshack for an environmentally sustainable camping shelter. The structure is situated just north of Joshua Tree National Park in the High Mojave Desert, 240km east of Los Angeles, in California, USA. The area is defined by extremely hot dry days and cool nights, with winds that whip up 'dust devils' across the desert. The design uses reflected heat to warm a thermal sleeping surface. During the day the shelter provides shade from the sun. When dusk approaches, the wing is lowered so that its metallic underside reflects heat and light to warm the beds. Prototypes of three Thermalwings were built, each aligned to a specific mountain view, and together they provide shelter for six people. Thermalwing was built by the designers in a 10-day hands-on process, that involved sourcing local materials and adapting the design to the area's climate.

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