Abstract: A baffle blank for a baffle assembly and a method for deploying the baffle assembly in a storage container for manipulating air flow in the container is provided. The baffle blank is made of stiff planar sheet material and has fold lines, cut lines and sulcations arranged to form a base, a deflector extending from the base along a hinge line, and an angle selector formed as cut-out in the baffle blank. The baffle blank is operable between a collapsed condition in which the base, deflector and angle selector lie in a substantially planar configuration, into a deployed baffle assembly in which the deflector is secured at a selected angle relative to the base by the angle selector with the angle selector extending between the base and deflector.