With the development of fast acting insulation doors EFAFLEX is going in a completely new direction. Two door technologies have been combined in a single, innovative system solution : The SST is based on the original multiple patented rapid spiral door. Equipped with a high insulation door panel from thermally separated slats with a K-factor of at least 0.5 W/m2K, or extruded aluminium with higher strength. The seals employed prevent unwanted air or temperature exchanges. The result is constant, climatic conditions. The SST is therefore the ideal closure door for very frequently used openings, e.g. in carparks, prisons, controlled temperature logistics, in refrigerated areas, or in conventional industrial constructions, if a demanding use is required. A high travel speed of up to 2 m/s is achievable, and a practically wear free door panel qualify the SST as a professional single door solution. The construction is designed for at least 150,000 operations per year, the highest availability with the least maintenance expenditure is guaranteed.