Model Series DFF Rectangular Floor Standing Displacement Diffusers are designed to integrate into the aesthetic feel of a space while simultaneously providing a quiet, low velocity air pattern necessary for occupant comfort. These diffusers incorporate a steel rectangular perforated face, with an integral plenum and equalization baffle, producing either a 1-way or 3-way air pattern. They are typically mounted against a wall, pillar or in a corner of a room in applications where there are space constraints.