When in 1947 the Red Cross commissioned a hot-air sterilizer to avoid the danger from infections and epidemics, Willi Memmert, an electrical engineer, proved his talent. In those times of economic hardship, he found the perfect material for his first temperature control chamber Aeolus: recycled aluminum from old aircraft parts. Willi Memmert turned the Aeolus into one of the typical success stories of the years of the Economic Miracle. In a very short time, he brought further models to the production line and distributed these beyond the borders of his home market.