In collaboration with AGC Green-Tech (Japan), the Bom Group has developed its own F-Clean® greenhouse. F-Clean® is a film material that looks like plastic film, but behaves like a membrane, which means it has to be tensioned. It is available in clear and diffuse versions and may be installed in both a single and a double layer. A greenhouse roof of double-layer F-Clean®, which has a diffuse inner layer, is continuously inflated into cushions by an inflation system. An energy saving of approx 30% is possible through use of two layers of F-Clean®. F-Clean® is already used on a large scale in cabriolet greenhouses. In these, the tensioning system is integrated into the roof construction.