Abstract: Suspension system for supporting an inflatable air duct includes at least one support bracket arranged to support the inflatable air duct, the at least one support bracket being suspendable, wherein the at least one support bracket includes a first bracket component arranged to support a first side of the inflatable air duct; and a second bracket component arranged to support a second opposite side of the inflatable air duct. A first end of each of the first and second bracket components has a plurality of bends so as to provide at least one holding point to prevent the first and second bracket components from rotating in opposite direction towards each other around an axis in parallel with a longitudinal direction of the inflatable air duct.