SolTech Energy, a Swedish company, was awarded “Hottest New Material 2010” for their unique home heating system contained within roofing tiles made out of ordinary transparent glass. The tiles have about the same weight as those made of clay. The system doesn’t heat up water or vacuum pipes, but clean air. The tiles are installed on top of a black nylon canvas, under which air slots are mounted. The black color absorbs heat from the sun and the air starts to circulate.